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OE-417 Electric Disturbance Events Database


Updated through March 2023.

OE-417 Database
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Utility companies and grid operators are required to submit reports on electric disturbance events to the Department of Energy (DOE) on a form known as an OE-417. The publicly available information from these reports is difficult to find, incomplete and confusing. For a detailed description of OE-417s and the reporting criteria, CLICK HERE.

I did an analysis of all the publicly available OE-417 data from January 1, 2010 through the present. (I started in 2010 because that is when the NERC CIP Coverup began.) First of all, there were 166 different “event types” reported many of which were either duplicates or related. For example, there were at least 24 different “event types” that denoted a physical attack. There were at least 50 “event types” that denoted a disturbance caused by weather. I grouped these 166 “event types” into 15 categories (actually “causes”) so that we could get a sense of what has actually threatened the electric grid in the past 10 years.

Unfortunately, the public OE-417 data is so bad that there were 752 electric disturbance events where I was unable to identify a cause. These are highlighted in yellow in the chart. I was able to identify a cause in 2459 electric disturbance events, or 80% of the OE-417 reports filed. Moreover, some data such as the number of “customers affected” does not appear accurate in some cases. Many OE-417’s do not appear to be updated. Reports from years ago show “unknown” under the number of customers affected, or show “0” when we know there were blackouts associated with those events.

Note: After the Texas Grid Collapse of 2021, I started breaking out separate charts for the TRE Region (Texas Reliability Entity a.k.a. Texas RE) in order to give the public better access to what has caused electric disturbances in Texas.

Here is another view of the data by year. Electric disturbance events where I was unable to identify a cause are highlighted in yellow in the chart:

OE-417 Database
Click for larger view

In the below OE-417 Quick Reference Database and CSV file, I added the column “Category” in order to consolidate “Event Types” for statistical purposes. All other data is from Department of Energy (DOE) OE-417 annual summaries.

To Download a CSV file with all columns, Click HERE.


DataDate Event BeganTime Event BeganDate of RestorationTime of RestorationArea AffectedNERC RegionAlert CriteriaEvent TypeDemand Loss (MW)Number of Customers AffectedCategory
2010-01-066:00 p.m.6:00 p.m. January 08Southwest LouisianaSERCMade Public AppealsN/AN/APublic Appeal
2010-01-113:45 a.m.9:57 a.m. January 11Northern and Central FloridaFRCC/SERCInterruptible Load Shed/Made Public AppealsN/AN/ALoad Shed
2010-01-1811:30 a.m.8:00 a.m. January 28Northern and Central CaliforniaWECCSevere Storm2901,700,000Weather
2010-01-197:30 a.m.12:24 p.m. January 19San FranciscoWECCSevere Storm30030,000Weather
2010-01-192:30 p.m.3:00 p.m. January 20San Diego and Orange CountiesWECCSevere Storm2,65050,000Weather
2010-01-201:00 p.m.6:10 p.m. January 24City of Los Angeles, CaliforniaWECCSevere StormN/A147,223Weather
2010-01-2812:00 p.m.12:00 p.m. February 02OklahomaSPPIce StormN/A68,705Weather
2010-02-012:32 p.m.5:00 p.m. February 01OklahomaSPPIce Storm/Electrical System Separation300Weather
2010-02-0510:30 p.m.12:00 p.m. February 12Southwestern PennsylvaniaRFCWinter StormN/A57,000Weather
2010-02-056:48 p.m.5:00 p.m. February 07North and South CarolinaSERCWinter Storm50074,000Weather
2010-02-057:00 p.m.3:46 p.m. February 12District of Columbia, Prince Georges and Montgomery Co. MDRFCWinter StormN/A97,651Weather
2010-02-0511:30 p.m.2:38 a.m. February 07Indiana, Ohio, W. Virginia and VirginiaRFCWinter StormN/A102,225Weather
2010-02-053:00 p.m.4:00 p.m. February 13Southern NJRFCWinter StormN/A221,000Weather
2010-02-068:00 a.m.9:00 a.m. February 06Delmarva PeninsulaRFCWinter StormN/A58,491Weather
2010-02-062:30 a.m.7:00 a.m. February 07Virginia, North CarolinaSERCWinter Storm600104,736Weather
2010-02-096:00 p.m.4:00 p.m. February 14Southeastern PennsylvaniaRFCWinter StormN/A223,000Weather
2010-02-1112:00 p.m.9:00 p.m. February 15Dallas/Fort Worth and East TexasTREWinter StormN/A500,000Weather
2010-02-125:00 a.m.5:00 p.m. February 12East Texas, Western Arkansas, Northern LousianiaSPPWinter StormN/A52,999Weather
2010-02-1410:00 a.m.12:00 p.m. February 14Western Pennsylvania nd Northeast Central WVRFCWinter Storm900190,000Weather
2010-02-198:30 p.m.4:01 a.m. February 20San Joaquin Field Division/Bakersfield, CAWECCFirm System Load Shed1,000N/ALoad Shed
2010-02-2310:00 p.m.4:00 p.m. February 25Upstate New YorkNPCCWinter StormN/A150,000Weather
2010-02-255:00 p.m.7:00 p.m. March 02New York CityNPCCWinter StormN/A55,000Weather
2010-02-2512:01 a.m.9:00 p.m. February 26Southeastern New York, Northern New JerseyNPCCWinter StormN/A65,000Weather
2010-02-2511:53 p.m.4:40 p.m. March 01Southern Maine and New HampshireNPCCWinter Storm510509,606Weather
2010-03-1312:00 p.m.8:05 p.m. March 15ConnecticutNPCCHigh Winds and Rain5050,246Weather
2010-03-133:00 p.m.4:00 p.m. March 17Long IslandNPCCHigh Winds and RainN/A153,000Weather
2010-03-136:00 p.m.9:00 a.m. March 20New York City and Westchester CountyNPCCHigh Winds and RainN/A173,000Weather
2010-03-131:00 a.m.6:40 p.m. March 16Southeasten PennsylvaniaRFCHigh Winds and rainN/A177,528Weather
2010-03-134:00 p.m.12:00 a.m. March 16Central New Jersey and Northern New JerseyRFCHigh Winds and FloodingN/A180,000Weather
2010-03-136:00 p.m.12:59 p.m. March 20Southern, Central and Northern New JerseyRFCHigh Winds and Rain100360,000Weather
2010-03-3111:59 p.m.12:55 a.m. April 01San Diego and Orange CountiesWECCShed Firm Load324290,000Load Shed
2010-03-3111:59 p.m.12:38 a.m. April 01San DiegoWECCShed Firm Load324N/ALoad Shed
2010-04-165:15 p.m.5:00 p.m. April 18Southwestern PennsylvaniaRFCSevere Thunderstorms15120,000Weather
2010-04-213:05 p.m.8:00 p.m. April 21Iberville, Parish, LouisianaSERCGenerator TrippedN/AN/AEquipment
2010-04-272:55 p.m.2:55 p.m. April 27Rocky Mount, NCSERCTransmission System InterruptionN/A29,376Transmission Interruption
2010-05-022:40 p.m.7:30 p.m. May 09Tennessee and MississippiSERCThunderstormsN/A50,500Weather
2010-05-188:15 a.m.10:46 p.m. May 18Central CaliforniaWECCBreakers Tripped318N/AEquipment
2010-05-2611:45 a.m.3:00 p.m. May 26Maryland, Pennsylvania, West Virginia, VirginiaRFC, SERC Made Public Appeal - System DrillN/AN/APublic Appeal
2010-06-0110:03 p.m.12:30 a.m. June 18Southwestern IndianaRFCFirm Load Shed5001Load Shed
2010-06-028:18 p.m.8:00 a.m. June 04San Antonio, TXTRESevere WeatherN/A126,000Weather
2010-06-064:45 a.m.5:35 a.m. June 06Northern CaliforniaWECCElectric System Separation32,650Islanding
2010-06-076:29 p.m.1:00 a.m. June 08Denver Metropolitan AreaWECCFirm Load Shed30031,000Load Shed
2010-06-0811:00 a.m.5:00 p.m. June 08Southeastern TexasTREThunderstormsN/A79,741Weather
2010-06-092:18 p.m.3:00 p.m. June 09Edenton, NCSERCTransmission System InterruptionN/A4,196Transmission Interruption
2010-06-1611:11 a.m.11:32 a.m. June 16New York (Rockland and Orange Counties)NPCCVoltage Reduction (System Test)N/AN/A?
2010-06-1710:49 a.m.11:02 a.m. June 17Eastern MontanaMROElectrical System SeparationN/AN/AIslanding
2010-06-178:30 a.m.5:47 p.m. June 17Morgan City, LASPPMade Public AppealN/AN/APublic Appeal
2010-06-179:30 a.m.5:17 p.m. June 17Southern LouisianaSERCMade Public AppealN/AN/APublic Appeal
2010-06-179:30 a.m.4:40 p.m. June 17Southern LouisianaSERCMade Public AppealN/AN/APublic Appeal
2010-06-179:30 a.m.4:40 p.m. June 17Southwestern LouisianaSPPMade Public AppealN/AN/APublic Appeal
2010-06-188:00 p.m.10:45 a.m. June 21Indiana, MichiganRFCSevere WeatherN/A79,000Weather
2010-06-183:30 p.m.12:30 a.m. June 20Northwest IndianaRFCThunderstormsN/A94,345Weather
2010-06-187:00 p.m.5:00 a.m. June 19Southern Portion of Lower MichiganRFCThunderstormsN/A100,000Weather
2010-06-188:00 p.m.7:30 p.m. June 22Detroit, MIRFCSevere WeatherN/A150,000Weather
2010-06-184:00 p.m.1:00 p.m. June 20Chicago, ILRFCSevere WeatherN/A400,000Weather
2010-06-211:48 p.m.8:31 p.m. June 22Cincinnati, OHRFCThunderstorms40050,636Weather
2010-06-223:34 p.m.7:00 p.m. June 22West/Central ArkansasSERCMade Public Appeal/Transmission Equipment Failure8425,159Transmission Interruption
2010-06-235:48 p.m.2:21 a.m. June 24Northwest IndianaRFCThunderstormsN/A53,000Weather
2010-06-235:00 p.m.1:40 p.m. June 25Chicago, ILRFCSevere WeatherN/A300,000Weather
2010-06-243:00 p.m.12:00 p.m. June 29Southwestern New JerseyRFCThunderstormsN/A150,000Weather
2010-06-243:30 p.m.11:59 p.m. June 29Southeastern PennsylvaniaRFCThunderstormsN/A355,000Weather
2010-06-2511:36 p.m.1:38 a.m. June 26Northern CaliforniaWECCElectrical System SeparationN/AN/AIslanding
2010-07-063:47 a.m.4:37 a.m. July 06Newark, DERFCTransformer Outage9518,400Equipment
2010-07-074:13 p.m.10:29 p.m. July 07York, South Central PennsylvaniaRFCLoss of Transmission EquipmentN/A43,903Transmission Interruption
2010-07-157:00 p.m.11:30 p.m. July 19Southeastern MichiganRFCSevere Weather540127,534Weather
2010-07-178:30 p.m.10:00 p.m. July 19MinnesotaMROStrong Winds, TornadoesN/A63,000Weather
2010-07-216:44 p.m.8:00 p.m. July 21ConnecticutNPCCThunderstormsN/A50,100Weather
2010-07-2310:00 a.m.11:55 p.m. July 24Northern UtahWECCMade Public Appeals8-JunN/APublic Appeal
2010-07-237:30 p.m.6:30 p.m. July 26Southeastern MichiganRFCSevere Weather40082,000Weather
2010-07-254:11 p.m.8:06 p.m. July 25Northern VirginiaSERCSevere Weather900-100081,000Weather
2010-07-253:20 p.m.6:00 p.m. July 27Central MarylandRFCSevere Weather480124,000Weather
2010-07-253:10 p.m.11:30 p.m. July 30Washington, DC RegionRFCSevere WeatherN/A297,700Weather
2010-07-295:43 p.m.8:07 p.m. July 29VirginiaSERCThunderstormsN/A55,000Weather
2010-07-296:39 p.m.7:26 p.m. July 29Southern CaliforniaWECCShed Interruptible Load, Wildfire522N/AWildfire
2010-07-296:39 p.m.7:26 p.m. July 29Southern CaliforniaWECCShed Interruptible Load, Wildfire522N/AWildfire
2010-08-0212:00 p.m.11:00 p.m. August 02Central CaliforniaWECCFuel Supply Deficiency (Hydro)N/AN/AFuel Supply Deficiency
2010-08-0212:45 p.m.11:00 a.m. August 04Southern LouisianaSERCMade Public AppealsN/AN/APublic Appeal
2010-08-0212:45 p.m.11:00 a.m. August 04Southern LouisianaSERCMade Public AppealsN/AN/APublic Appeal
2010-08-0212:45 p.m.11:00 a.m. August 04Southwestern LouisianaSERCMade Public AppealsN/AN/APublic Appeal
2010-08-0212:45 p.m.11:00 a.m. August 04Southern LouisianaSPPMade Public AppealsN/AN/APublic Appeal
2010-08-0412:00 p.m.10:00 p.m. August 04Northern Texas, Eastern New MexicoSPPMade Public AppealsN/AN/APublic Appeal
2010-08-044:45 p.m.12:00 a.m. August 07Western Pennsylvania, Northwestern and Central West VirginiaRFCThunderstorms6011,186Weather
2010-08-045:00 p.m.4:00 a.m. August 06Ohio, West Virginia, KentuckyRFCSevere WeatherN/A37,000Weather
2010-08-053:30 p.m.10:00 p.m. August 05District of Columbia, MarylandRFCThunderstormsN/A76,729Weather
2010-08-053:54 p.m.12:00 a.m. August 08Northern VirginiaRFCThunderstormsN/A145,157Weather
2010-08-0912:00 p.m.12:00 p.m. August 16Upstate New YorkRFCFuel Supply DefiencyN/AN/AFuel Supply Deficiency
2010-08-113:21 p.m.12:12 p.m. August 11OhioRFCSevere WeatherN/A57,000Weather
2010-08-123:42 p.m.10:10 p.m. August 12City of Oshkosh, WisconsinMROMade Public Appeals307,600Public Appeal
2010-08-128:21 a.m.11:00 a.m. August 12Central NebraskaSPPMade Public Appeals65N/APublic Appeal
2010-08-126:45 a.m.9:00 p.m. August 12District of Columbia, MarylandRFCSevere WeatherN/A101,003Weather
2010-08-196:00 p.m.3:30 p.m. August 23Southeastern MichiganRFCSevere Weather34080,000Weather
2010-08-235:50 p.m.9:30 a.m. August 24Houston, TexasTRESevere Weather74681,586Weather
2010-09-0110:20 a.m.12:44 p.m. September 01Pittsburg (Bay Area), CaliforniaWECCElectrical System Separation (Islanding)3115,000Islanding
2010-09-072:02 p.m.1:27 a.m. September 08San Antonio, TexasTRETropical StormN/A340,350Weather
2010-09-205:00 p.m.5:30 p.m. September 20King George County, VirginiaSERCLow Flying HelicopterN/AN/A?
2010-09-219:31 p.m.2:30 p.m. September 22Central and Southern MichiganRFCThunderstormsN/A138,000Weather
2010-09-226:12 a.m.11:00 p.m. September 22Bakersfield, CaliforniaWECCFirm Load Shed526N/ALoad Shed
2010-09-224:08 p.m.12:00 a.m. September 26City of Pittsburgh, PennsylvaniaRFCThunderstorms15652,000Weather
2010-09-225:38 p.m.11:30 p.m. September 24Western PennsylvaniaRFCThunderstorms38982,861Weather
2010-09-273:15 p.m.6:12 p.m. September 27Central and Southern CaliforniaWECCInterruptible Load Shed595N/ALoad Shed
2010-10-055:45 a.m.6:00a.m. October 07City of Los Angeles, CaliforniaWECCRain and High WindsN/A73,514Weather
2010-10-268:00 p.m.10:00 p.m. October 28MinnesotaMROHigh WindsN/A70,000Weather
2010-10-269:00 a.m.11:00 a.m. October 28Northern IllinoisRFCThunderstormsN/A192,106Weather
2010-10-275:16 p.m.5:27 p.m. October 27Northern CaliforniaWECCElectrical System Separation-Islanding162,674Islanding
2010-10-274:00 a.m.12:00 p.m. October 27Northeast and North Central WisconsinMROHigh WindsN/A63,000Weather
2010-10-275:00 p.m.4:00 a.m. October 29Northern IllinoisRFCHigh WindsN/A127,000Weather
2010-10-278:00 a.m.7:00 a.m. October 29Michigan's Northerly Lower PeninsulaRFCHigh Winds240285,000Weather
2010-10-3110:26 p.m.1:45 a.m. November 01Bakersfield, CaliforniaWECCFirm System Load Loss500N/ALoad Shed
2010-11-049:46 a.m.10:47 a.m. November 04Rock Springs, WyomingWECCTransmission Equipment Failure/Interruptible Load ShedN/AN/ATransmission Interruption
2010-11-063:53 p.m.6:08 p.m. November 06Northern CaliforniaWECCElectrical System Separation - Islanding204Islanding
2010-11-086:47 a.m.6:00 p.m. November 08MaineNPCCSnow and High WindsN/A60,863Weather
2010-11-133:00 p.m.10:00 p.m. November 14MinnesotaMROWinter StormN/A60,000Weather
2010-11-1511:00 p.m.2:14 a.m. November 16Puget Sound RegionWECCHigh Winds391149,256Weather
2010-11-211:39 a.m.4:46 p.m. November 24Northern and Central CaliforniaWECCWinter Storm7560,000Weather
2010-11-2211:00 p.m.8:00 p.m. November 24Puget Sound Region, WashingtonWECCWinter Storm420123,535Weather
2010-11-232:01 p.m.6:12 p.m. November 23Northern CaliforniaWECCElectrical System Separation - Islanding227,077Islanding
2010-12-039:32 p.m.2:00 a.m. December 04CaliforniaWECCElectrical System Separation - Islanding227,077Islanding
2010-12-124:30 p.m.2:00 p.m. December 15Southeastern MichiganRFCSevere Weather21060,175Weather
2010-12-147:20 a.m.7:25 a.m. December 14CaliforniaWECCElectrical System Separation - Islanding96,635Islanding
2010-12-147:36 a.m.9:00 a.m. December 15Southern CaliforniaWECCTransmission Equipment/Firm System Load464N/ALoad Shed
2010-12-185:00 a.m.10:00 p.m. December 19Redmond, WashingtonWECCSevere Weather18492,090Weather
2010-12-268:15 a.m.4:15 p.m. December 26CarolinaSERCSevere WeatherN/A42,000Weather
2010-12-302:00 p.m.6:00 a.m. January 12New YorkRFCFuel Supply Deficiency300N/AFuel Supply Deficiency
2011-01-126:00 AM1/12/20112:00 PMMassachusettsNPCCWinter StormN/A80,000Weather
2011-01-137:21 AM1/13/20118:13 AMNorth FloridaFRCCFirm System Load Shed15020,900Load Shed
2011-01-182:00 PM1/18/20112:00 PMWhitman, Auburn St Substation, MassachusettsNPCCVandalism00Physical Attack
2011-01-237:00 AM1/23/20111:00 PMFranklin County, IdahoWECCVandalism00Physical Attack
2011-01-241:20 PM1/24/20111:30 PMNewman Power Plant, TexasWECCSuspicious Activity00Physical Attack
2011-01-253:23 AM1/25/201111:00 AMNewark, DelawareRFCVandalism00Physical Attack
2011-01-269:25 AM1/27/20115:00 PMCarson City, NevadaWECCSuspected Telecommunications Attack00Cyber Attack
2011-01-269:33 AM1/27/20113:03 PMMichiganRFCVandalism00Physical Attack
2011-01-267:43 PM1/27/20116:18 PMNorthern VirginiaSERCWinter Storm600150,084Weather
2011-01-265:00 PM1/31/20118:00 AMMontgomery and Prince George's County, Maryland and District of ColumbiaRFCWinter StormN/A210,000Weather
2011-01-266:28 PM1/29/20115:00 PMMarylandRFCWinter StormN/A234,326Weather
2011-01-275:00 PM1/30/20115:00 AMCentral New YorkNPCCFuel Supply Deficiency (Coal)108N/AFuel Supply Deficiency
2011-01-279:30 AM1/27/20119:30 AMHockessin, DelawareRFCVandalism00Physical Attack
2011-01-3110:00 PM2/3/201112:00 PMSouthwestern Ohio and IndianaRFCIce Storm996272,880Weather
2011-02-013:00 PM2/3/201112:00 PMIndiana, OhioRFCWinter StormUNK158,013Weather
2011-02-025:00 PM2/3/201110:00 PMTexas Panhandle, Southeastern New MexicoSPPFuel Supply Deficiency (Natural Gas)UNKUNKFuel Supply Deficiency
2011-02-026:22 AM2/2/20119:57 AMCentral ArizonaWECCGeneration Inadequacy/Load Shed3,96369,000Generation Interruption
2011-02-027:24 AM2/2/201110:23 PMDona Ana and El Paso Counties, Texas and Hudspeth County, New MexicoWECCGeneration Inadequacy/Load Shed280178,000Generation Interruption
2011-02-025:43 AM2/3/201110:00 AMTexasTREGeneration Inadequacy/Load Shed4,0001,069,730Generation Interruption
2011-02-023:00 AM2/4/201111:59 PMPhiladelphia area, PennsylvaniaRFCWinter StormUNK213,000Weather
2011-02-032:30 PM2/3/20112:30 PMBowie, MarylandRFCSuspected Cyber AttackN/A0Cyber Attack
2011-02-033:00 PM2/4/201112:00 PMSan Diego area, CaliforniaWECCFuel Supply Deficiency (Natural Gas)N/AUNKFuel Supply Deficiency
2011-02-0310:04 PM2/4/201112:32 PMTexasTREGeneration Inadequacy/Load Shed40086,013Generation Interruption
2011-02-092:54 PM2/9/20115:00 PMUniversity Place, WashingtonWECCVandalism00Physical Attack
2011-02-093:45 AM2/9/20119:12 AMWestern Houston, TexasTREWinter Storm39960,000Weather
2011-02-094:30 PM2/10/201112:33 PMTexasTRECold Weather EventN/AN/AWeather
2011-02-101:00 PM2/10/20111:00 PMLaGrande, WashingtonWECCVandalism00Physical Attack
2011-02-171:00 PM2/23/20114:53 PMRoseville, CaliforniaWECCSuspected Cyber Attack00Cyber Attack
2011-02-171:25 AM2/19/201110:13 AMNorthern and Central CaliforniaWECCMajor Storm9180,000Weather
2011-02-194:34 PM2/19/20114:34 PMHarrington, DelawareRFCVandalism00Physical Attack
2011-02-1912:30 PM2/20/20114:00 AMPhiladelphia area, PennsylvaniaRFCMajor StormUNK118,000Weather
2011-02-204:00 PM2/23/20114:00 PMSouthern Lower Peninsula, MichiganRFCWinter Storm262160,000Weather
2011-02-244:51 PM2/24/20114:54 PMArkansasSPPElectrical System Separation (Islanding)4UNKIslanding
2011-02-2510:30 AM2/25/201110:45 AMSalt Lake City, UtahWECCVandalism00Physical Attack
2011-02-253:20 PM2/25/20116:00 PMVirginiaSERCSevere WeatherUNK50,000Weather
2011-02-258:00 AM2/28/20115:30 PMNorthern and Central CaliforniaWECCWinter Storm9180,000Weather
2011-02-253:23 PM2/27/20116:00 PMMarylandRFCSevere WeatherUNK93,000Weather
2011-03-018:00 AM3/5/20119:30 AMWestern New YorkNPCCFuel Supply Deficiency (Coal)675UNKFuel Supply Deficiency
2011-03-062:54 AM3/8/20118:00 AMSalt Lake City Region, UtahWECCVandalismUNK0Physical Attack
2011-03-1012:03 PM3/11/20116:00 AMTexasTRESuspected Physical AttackN/AN/APhysical Attack
2011-03-117:02 AM3/11/20119:15 AMHumboldt and Eureka, CaliforniaWECCGeneration Inadequacy/Load Shed156,800Generation Interruption
2011-03-132:20 PM3/14/20113:46 PMOregonWECCSevere WeatherUNK9,000Weather
2011-03-147:30 AM3/14/20114:55 PMBaltimore, MarylandRFCSuspected Cyber AttackN/AN/ACyber Attack
2011-03-156:00 PM3/15/20117:14 PMThe Woodlands, TexasTRESuspected Physical AttackN/AN/APhysical Attack
2011-03-177:40 AM3/17/201111:00 AMDeerfield, New HampshireNPCCVandalismN/AN/APhysical Attack
2011-03-189:54 AM3/18/20113:34 PMGreene County, OhioRFCVandalismN/AN/APhysical Attack
2011-03-1911:56 PM3/24/20117:10 PMNorthern and Central CaliforniaWECCMajor Storm91128,000Weather
2011-03-209:44 AM3/21/201110:00 AMLos Angeles, CaliforniaWECCMajor StormUNK79,000Weather
2011-03-2112:57 AM3/21/20112:29 AMDeerfield, New HampshireNPCCVandalismN/AN/APhysical Attack
2011-03-2112:35 PM3/21/20112:45 PMSouthern CaliforniaWECCMajor Storm15054,332Weather
2011-03-236:30 PM3/24/20114:55 AMIndiana. Kentucky, Michigan, Ohio, Tennessee, Virginia, West VirginiaRFCMajor StormUNK60,596Weather
2011-03-271:27 PM3/27/20115:00 PMSonoma and Central Valley, CaliforniaWECCTransmission Level Outage295165,000Transmission Interruption
2011-03-312:30 PM4/1/201111:59 PMCentral and Western FloridaFRCCSevere WeatherUNK50,000Weather
2011-03-3111:30 AM3/31/20118:30 PMGreater Tampa Bay, FloridaFRCCSevere Weather20687,000Weather
2011-04-038:23 PM4/5/20113:00 PMUnknownSERCSuspected Cyber Attack00Cyber Attack
2011-04-047:00 PM4/5/201112:00 PMKentucky, West VirginiaRFCSevere WeatherUNK52,920Weather
2011-04-0411:47 AM4/8/201112:01 AMMemphis, TennesseeSERCSevere Weather35963,000Weather
2011-04-041:00 PM4/5/201112:00 AMShelby County, TennesseeSERCSevere Weather30063,000Weather
2011-04-047:00 PM4/5/20118:00 PMSoutheast Arkansas, Southeast Louisiana, Western Mississippi, Eastern TexasSERCSevere WeatherUNK74,645Weather
2011-04-049:00 PM4/5/201111:30 PMAlabama, Florida, Georgia, MississippiSERCSevere Weather674303,434Weather
2011-04-052:00 AM4/7/201111:00 PMNorth Carolina, South CarolinaSERCSevere Weather1,200256,000Weather
2011-04-0610:50 AM4/6/201110:50 AMFelton, DelawareRFCVandalism00Physical Attack
2011-04-115:40 PM4/11/20115:51 PMSalt Lake City, UtahWECCSuspicious Activity00Physical Attack
2011-04-162:16 PM4/17/20114:30 PMCentral and Eastern North CarolinaSERCSevere WeatherUNK220,000Weather
2011-04-192:01 PM4/19/20114:04 PMGraham, WashingtonWECCVandalism00Physical Attack
2011-04-1910:44 PM4/20/20112:00 AMMemphis, TennesseeSERCSevere Weather10064,000Weather
2011-04-198:00 PM4/19/201110:00 PMIllinoisSERCSevere WeatherUNK80,000Weather
2011-04-1911:02 PM4/21/20115:32 PMMemphis, TennesseeSERCSevere Weather300105,000Weather
2011-04-1911:13 PM4/20/20117:14 PMOsceola, ArkansasSERCSevere Weather22UNKWeather
2011-04-208:07 AM4/20/20118:14 AMRuston, LouisianaSERCEquipment Malfunction3311,000Equipment
2011-04-202:00 AM4/21/201112:00 PMIndiana, Kentucky, OhioRFCSevere Weather - High WindsUNK165,711Weather
2011-04-217:15 AM4/21/20114:50 PMOquirrh Substation, Salt Lake City, UtahWECCVandalism00Physical Attack
2011-04-217:00 PM4/29/20117:05 PMTrenton, MichiganRFCSuspicious ActivityUNKUNKPhysical Attack
2011-04-229:00 PM4/22/201111:00 PMMetro St. Louis area, MissouriSERCSevere Weather055,000Weather
2011-04-254:33 PM4/25/20115:19 PMNortheast TennesseeSERCEquipment Malfunction140UNKEquipment
2011-04-255:30 PM4/27/20116:00 PMArkansas, Louisiana, MississippiSPPSevere WeatherUNK141,700Weather
2011-04-261:04 PM4/26/20112:00 PMSalt Lake City, UtahWECCVandalism00Physical Attack
2011-04-266:14 PM4/28/20115:00 PMEastern ArkansasSPPSevere Weather5013,000Weather
2011-04-269:51 AM4/28/20119:51 AMAlabama, Georgia, Mississippi, TennesseeSERCSevere WeatherUNK55,000Weather
2011-04-265:49 AM4/27/20119:59 AMSouthern LouisianaSPPSevere Weather120UNKWeather
2011-04-2710:00 PM4/28/201110:00 AMOhio, Tennessee, VirginiaSERCSevere Weather069,000Weather
2011-04-278:00 AM5/2/20114:03 PMAlabama, Florida, Georgia, MississippiSERCSevere Weather1,422426,640Weather
2011-04-2710:00 AM4/29/20114:29 PMAlabama, Georgia, Mississippi, TennesseeSERCSevere WeatherUNK612,000Weather
2011-04-284:09 PM4/28/20114:10 PMPhoenix, ArizonaWECCEquipment Malfunction960UNKEquipment
2011-04-285:00 AM4/30/20116:30 PMCleveland area, OhioRFCSevere WeatherUNK86,000Weather
2011-05-028:52 AM5/2/201110:46 AMN. Ogden Substation, Ogden, UtahWECCVandalism00Physical Attack
2011-05-022:00 PM5/2/20112:00 PMWest River Substation, New Haven, ConnecticutNPCCSuspected Physical Attack00Physical Attack
2011-05-025:06 PM5/2/20118:00 PMHawaiiN/ASevere Weather22062,000Weather
2011-05-0312:00 PM5/5/201112:00 PMSt. Lawrence Power Dam, New YorkNPCCSuspected Physical Attack00Physical Attack
2011-05-0412:20 PM5/4/20113:40 PMMichiganRFCSuspected Sabotage00Physical Attack
2011-05-059:15 AM5/5/20119:15 AMNew HampshireNPCCVandalism00Physical Attack
2011-05-066:56 AM5/6/201110:30 AMAlderwood Substation, Portland, OregonWECCVandalism00Physical Attack
2011-05-087:35 PM5/8/20117:35 PMNew YorkNPCCVandalismUNK0Physical Attack
2011-05-091:11 PM5/9/20111:11 PMMilton, New HampshireNPCCVandalism00Physical Attack
2011-05-094:08 AM5/9/20116:40 AMHoltwood, PennsylvaniaRFCSuspected Physical Attack630UNKPhysical Attack
2011-05-103:25 AM5/11/20112:10 PMUpper Peninsula, MichiganRFCGeneration Inadequacy; Load Shed; Electrical System Separation (Islanding)58578,213Islanding
2011-05-101:45 PM5/10/20113:00 PMNew HampshireNPCCVandalism00Physical Attack
2011-05-1010:21 PM5/11/20112:25 PMKentucky, West VirginiaRFCSevere WeatherUNK58,000Weather
2011-05-1111:00 AM5/11/201111:30 AMNorth Chelsea Substation, New YorkNPCCVandalism00Physical Attack
2011-05-111:35 PM5/11/20111:35 PMGreen River, WyomingWECCVandalism00Physical Attack
2011-05-113:55 PM5/12/20111:57 PMColbyville, Haines Road and Arrowhead Substations, MinnesotaMROVandalism00Physical Attack
2011-05-1112:15 AM5/11/20115:20 PMCharlotte, North CarolinaSERCSevere Weather30071,000Weather
2011-05-136:00 AM5/13/20116:00 AMSalt Lake, UtahWECCVandalism00Physical Attack
2011-05-215:00 PM5/22/20116:34 PMDixie Valley Area, NevadaWECCPhysical Attack56UNKPhysical Attack
2011-05-225:09 PM5/31/201112:01 PMJoplin, Sarcoxie, and Wentworth, MissouriSPPSevere Weather20020,000Weather
2011-05-2312:30 PM5/25/201112:30 PMSt. Louis County, MissouriSERCSevere WeatherUNK70,000Weather
2011-05-234:45 PM5/25/201111:59 PMCentral, IndianaRFCSevere Weather1,024215,387Weather
2011-05-249:00 AM5/25/20119:10 AMChicago, IllinoisRFCPhysical Attack00Physical Attack
2011-05-244:45 PM5/26/20115:00 PMCentral OklahomaSPPSevere WeatherUNK54,000Weather
2011-05-244:35 PM5/25/201112:40 PMEastern VirginiaSERCSevere Weather790175,000Weather
2011-05-2510:14 PM5/28/201111:00 AMCentral IndianaRFCSevere Weather200141,000Weather
2011-05-261:00 AM5/26/20116:00 AMGreenwood, MississippiSERCTransmission Level Interruption3010,000Transmission Interruption
2011-05-267:56 PM5/27/20116:00 PMCentral PennsylvaniaRFCSevere Weather150120,001Weather
2011-05-266:30 PM5/28/20114:44 AMSouthern Balancing Area, GeorgiaSERCSevere Weather729218,783Weather
2011-05-296:30 PM5/31/201110:00 PMMid and Southern Lower Peninsula, MichiganRFCSevere Weather250113,000Weather
2011-06-0211:45 PM6/4/20114:00 PMGreater Columbia, South CarolinaSERCSevere Weather050,465Weather
2011-06-041:17 AM6/4/20113:25 AMMidway, CaliforniaWECCVandalismUNK420Physical Attack
2011-06-058:02 PM6/5/20118:55 PMMelones, CaliforniaWECCElectrical System Separation (Islanding)105,314Islanding
2011-06-055:30 AM6/6/20111:30 AMHouston Metro-Area, TexasTRESevere Thunderstorms47378,000Weather
2011-06-0612:13 AM6/6/20113:15 AMEl Paso County, Texas; Dona Ana County, New MexicoSPPLoad Shed/ Automatic undervoltage relay action450162,000Load Shed
2011-06-072:00 PM6/8/20116:00 AMOhioRFCSevere WeatherUNK52,747Weather
2011-06-0812:58 PM6/8/201112:58 PMFredrickson Substation, WashingtonWECCVandalismN/AN/APhysical Attack
2011-06-092:15 PM6/9/20112:15 PMSan Antonio Dam Area, Los Angeles County, CaliforniaWECCSuspected Physical Attack00Physical Attack
2011-06-095:51 PM6/10/201112:00 PMWestern, Massachusetts; ConnecticutNPCCSevere Thunderstorms0100,000Weather
2011-06-094:30 AM6/9/201112:00 PMIllinoisRFCSevere ThunderstormsUNK169,000Weather
2011-06-127:00 PM6/12/20118:30 PMVirginiaRFCSevere Thunderstorms25056,000Weather
2011-06-154:00 PM6/16/20116:30 AMBingham County, IdahoWECCVandalismN/AN/APhysical Attack
2011-06-157:17 PM6/16/20111:45 AMPiedmont, North CarolinaSERCSevere Thunderstorms30070,135Weather
2011-06-157:15 PM6/16/20116:00 AMGeorgiaSERCSevere Thunderstorms563169,000Weather
2011-06-184:45 PM6/20/201111:59 PMEastern, ArkansasSPPPublic Appeal to Reduce Electricity UsageUNKUNKPublic Appeal
2011-06-185:00 PM6/18/20119:33 PMNorth Carolina; South CarolinaSERCSevere Thunderstorms30070,000Weather
2011-06-183:30 PM6/19/20113:42 PMNorthern, GeorgiaSERCSevere Thunderstorms31293,828Weather
2011-06-2010:36 AM6/20/201110:36 AMCollins Substation, WashingtonWECCVandalism00Physical Attack
2011-06-216:30 PM6/22/20117:00 AMAEP RegionRFCSevere WeatherUNK56,000Weather
2011-06-219:45 PM6/23/20112:00 AMIllinoisRFCSevere ThunderstormsUNK300,000Weather
2011-06-228:12 PM6/22/20118:12 PMKnoble Substation, Spanaway, WashingtonWECCVandalism00Physical Attack
2011-06-227:00 PM6/23/20111:00 AMAlabama; GeorgiaSERCSevere Thunderstorms31675,101Weather
2011-06-229:46 AM6/22/20119:46 AMKnoxville, TennesseeSERCSevere WeatherUNK106,300Weather
2011-06-238:10 AM6/23/20119:00 AMHighgate, VermontNPCCVandalism00Physical Attack
2011-06-246:30 PM6/25/20111:30 AMNorth/North Central Alabama; GeorgiaSERCSevere Thunderstorms340102,275Weather
2011-06-264:46 PM6/27/20117:59 AMSouthwest KansasSPPPublic Appeal to Reduce Electricity UsageUNKUNKPublic Appeal
2011-06-266:00 PM6/27/20111:00 PMAlabama; GeorgiaSERCSevere Thunderstorms30090,160Weather
2011-06-276:55 PM6/27/20116:55 PMOlympic Pipeline Substation, WashingtonWECCVandalismUNKUNKPhysical Attack
2011-06-273:00 PM6/27/20117:00 PMTexasTREPublic Appeal to Reduce Electricity Usage00Public Appeal
2011-06-2712:00 AM6/29/20111:00 AMIllinois; MissouriSERCSevere ThunderstormsUNK80,000Weather
2011-06-2911:30 AM6/29/20116:04 PMPanhandle and Muleshoe, TexasSPPPublic Appeal to Reduce Electricity Usage00Public Appeal
2011-06-302:11 PM6/30/201111:25 PMPhoenix, ArizonaWECCMajor System Interruption/Load Shed5,299160,000Load Shed
2011-06-3010:31 PM6/30/201110:31 PMOlympic Pipeline Substation, WashingtonWECCVandalism00Physical Attack
2011-06-3010:30 PM7/1/20115:00 PMIllinoisRFCSevere WeatherUNK121,000Weather
2011-07-018:00 AM7/1/20118:01 AMCONVEX Local Control Center, ConnecticutNPCCVandalism00Physical Attack
2011-07-014:38 PM7/1/201110:38 PMGreene County OhioRFCVandalismN/A0Physical Attack
2011-07-015:00 PM7/3/20118:00 PMSouthwest and South Central MinnesotaMROSevere WeatherUNK70,000Weather
2011-07-028:15 PM7/6/201110:00 PMSouth East, Lower Peninsula, MichiganRFCSevere WeatherUNK182,000Weather
2011-07-046:00 PM7/4/20119:00 PMVirginiaSERCSevere Weather15051,580Weather
2011-07-0510:40 AM7/5/201111:37 AMWest Valley Substation UtahWECCVandalism00Physical Attack
2011-07-069:51 AM7/6/20119:52 AMVermontNPCCVandalismN/AN/APhysical Attack
2011-07-0810:00 AM7/11/20119:00 AMPJM Corporate Office, PennsylvaniaRFCSuspected Cyber AttackUNKUNKCyber Attack
2011-07-0810:00 AM7/8/201110:00 AMSaginaw, MinnesotaMROVandalism00Physical Attack
2011-07-111:13 PM7/11/20111:13 PMSouthwest OhioRFCVandalism00Physical Attack
2011-07-111:30 PM7/11/20111:30 PMMaineNPCCVandalismN/A0Physical Attack
2011-07-1111:15 AM7/12/20118:15 AMWestern and Southern Lower Peninsula MichiganRFCSevere WeatherUNK85,000Weather
2011-07-119:00 AM7/11/201110:25 AMMichiganRFCSevere Weather254103,000Weather
2011-07-112:27 PM7/12/20113:50 PMIndiana, Michigan, OhioRFCSevere WeatherUNK120,000Weather
2011-07-119:00 AM7/11/20119:00 AMIllinoisRFCSevere WeatherUNK500,000Weather
2011-07-1212:00 PM7/12/201112:00 PMMaineNPCCVandalismN/A0Physical Attack
2011-07-128:20 PM7/12/20119:30 PMCaliforniaWECCSuspected Physical AttackUNKUNKPhysical Attack
2011-07-135:19 PM7/13/201110:03 PMPueblo, ColoradoWECCLoad Shed580N/ALoad Shed
2011-07-1411:00 AM7/14/20117:00 PMTexasTREPublic Appeal to Reduce Electricity Usage00Public Appeal
2011-07-185:00 PM7/24/20111:30 PMSoutheast MichiganRFCSevere WeatherN/A197,166Weather
2011-07-1911:45 AM7/19/20113:00 PMMaineNPCCVandalismN/AN/APhysical Attack
2011-07-209:10 AM7/20/20114:30 PMFrederickson Substation, WashingtonWECCVandalismN/AN/APhysical Attack
2011-07-2112:32 PM7/22/20116:30 AMLower Peninsula, MichiganRFCPublic Appeal to Reduce Electricity Usage8,881N/APublic Appeal
2011-07-211:00 PM7/21/20113:00 PMSpringfield, IllinoisSERCPublic Appeal to Reduce Electricity UsageN/AN/APublic Appeal
2011-07-2211:34 AM7/22/20115:26 PMOhioRFCLoad Shed20623,000Load Shed
2011-07-2211:00 AM7/22/20116:00 PMUpstate, New YorkNPCCPublic Appeal to Reduce Electricity UsageN/AN/APublic Appeal
2011-07-232:30 AM7/24/20119:00 AMIllinoisRFCSevere WeatherUNK169,000Weather
2011-07-242:34 PM7/24/20113:47 PMSouthern, New HampshireNPCCVandalism00Physical Attack
2011-07-2612:01 PM7/26/201112:01 PMBackup Control Center, OklahomaSPPVandalism00Physical Attack
2011-07-2712:07 PM7/27/201112:08 PMFife, WashingtonWECCVandalismN/AN/APhysical Attack
2011-07-287:26 AM7/29/20117:26 AMDaviess County, KentuckySERCFuel Supply Deficiency (Coal)N/AN/AFuel Supply Deficiency
2011-07-281:32 PM7/28/20111:32 PMIndianaRFCVandalismN/AN/APhysical Attack
2011-07-287:25 PM7/28/20117:25 PMSpanaway, WashingtonWECCVandalismN/AN/APhysical Attack
2011-07-2812:14 AM7/29/201112:00 PMEntire ComEd Territory, IndianaRFCSevere WeatherUNK201,000Weather
2011-07-2911:46 AM7/29/20115:00 PMFredrickson, WashingtonWECCVandalismN/AN/APhysical Attack
2011-07-298:45 PM8/1/20114:24 AMCentral New JerseyRFCSevere WeatherN/A67,900Weather
2011-08-012:18 PM8/1/20112:18 PMJefferson, OregonWECCVandalismN/AN/APhysical Attack
2011-08-013:00 PM8/5/20117:00 PMTexasTREPublic Appeal to Reduce Electricity Usage00Public Appeal
2011-08-0210:15 AM8/3/20119:16 AMOklahomaSPPPublic Appeal to Reduce Electricity UsageN/AN/APublic Appeal
2011-08-029:30 PM8/3/20117:00 PMNortheast, IllinoisRFCSevere WeatherUNK71,500Weather
2011-08-0310:00 AM8/19/201110:00 AMWestern New YorkNPCCFuel Supply Deficiency (Coal)675UNKFuel Supply Deficiency
2011-08-034:30 PM8/3/20119:00 PMCentral ArkansasSPPPublic Appeal to Reduce Electricity Usage00Public Appeal
2011-08-034:29 PM8/3/201111:40 PMNortheast OklahomaSPPPublic Appeal to Reduce Electricity Usage300N/APublic Appeal
2011-08-0410:30 AM8/4/20114:00 PMArkansas, Oklahoma, TexasSPPPublic Appeal to Reduce Electricity UsageN/AN/APublic Appeal
2011-08-087:36 PM8/9/201112:00 PMOklahomaSPPElectrical System Separation (Islanding)9214,500Islanding
2011-08-089:30 AM8/8/20119:30 AMGreene County, OhioRFCSuspected Physical Attack00Physical Attack
2011-08-089:35 AM8/8/20114:00 PMCollins Substation, WashingtonWECCVandalismN/AN/APhysical Attack
2011-08-088:58 PM8/10/20114:30 PMNorthern and Central OklahomaSPPSevere WeatherN/A54,000Weather
2011-08-0910:26 AM8/9/20115:00 PMPolk Substation, Tacoma, WashingtonWECCVandalismN/AN/APhysical Attack
2011-08-134:41 PM8/14/20117:00 PMKentuckySERCSevere WeatherUNK181,700Weather
2011-08-152:05 AM8/15/20113:40 AMUtahWECCVandalism00Physical Attack
2011-08-189:51 AM8/18/20114:00 PMCollins Substation, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2011-08-205:42 PM8/23/20118:00 PMSoutheastern MichiganRFCSevere Weather25465,000Weather
2011-08-2110:45 PM8/23/201110:45 PMPuerto RicoN/ASevere Weather2,200931,000Weather
2011-08-2210:05 AM8/22/20114:00 PMCollins Substation, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2011-08-231:51 PM8/23/20111:51 PMVirginiaRFCEarthquake00Natural Disaster
2011-08-2310:30 AM8/23/20114:54 PMSoutheastern New Mexico, Texas PanhandleSPPPublic Appeal to Reduce Electricity Usage00Public Appeal
2011-08-233:43 PM8/23/20117:00 PMTexasTREPublic Appeal to Reduce Electricity Usage00Public Appeal
2011-08-241:20 PM8/29/20117:00 PMTexasTREPublic Appeal to Reduce Electricity Usage00Public Appeal
2011-08-242:51 PM8/24/201110:00 PMArkansas, Louisiana, TexasSPPSevere WeatherN/A53,064Weather
2011-08-247:45 AM8/25/20116:00 AMHouston area, TexasTRESevere Weather48579,000Weather
2011-08-2512:01 AM8/25/201112:01 AMMaineNPCCSuspected Physical Attack00Cyber Attack
2011-08-2512:30 AM8/28/20118:00 PMCleveland area, OhioRFCSevere WeatherN/A107,833Weather
2011-08-2612:30 AM8/28/201112:30 AMPennsylvaniaRFCSevere WeatherN/A200,717Weather
2011-08-272:00 AM8/27/20115:15 AMWilson County North CarolinaSERCDistribution System Interruption21,200Distribution Interruption
2011-08-2711:00 PM8/29/20118:00 AMMarylandRFCSevere WeatherUNK108,000Weather
2011-08-277:00 PM8/29/20111:31 PMEastern North CarolinaSERCSevere Weather200136,000Weather
2011-08-2710:00 PM8/29/20114:00 PMSouthern New JerseyRFCSevere Weather320140,000Weather
2011-08-271:00 PM8/29/20111:00 PMDelaware; MarylandRFCSevere WeatherN/A165,000Weather
2011-08-2711:05 PM8/29/20773:30 PMDistrict of Columbia; MarylandRFCSevere WeatherN/A220,000Weather
2011-08-2710:00 PM8/29/201110:00 PMPennsylvaniaRFCSevere WeatherN/A264,000Weather
2011-08-272:57 AM8/29/201111:30 PMEastern North CarolinaSERCSevere WeatherUNK285,465Weather
2011-08-278:30 PM9/4/201111:30 PMMarylandRFCSevere Weather1,114760,113Weather
2011-08-2710:33 AM8/29/20112:00 PMNorth Carolina; VirginiaSERCSevere WeatherUNK1,000,000Weather
2011-08-288:55 PM8/28/201111:39 PMCalapooya Substation, OregonWECCSuspected Physical Attack00Physical Attack
2011-08-285:01 AM9/3/20115:01 AMBorough's and Westshester County New YorkNPCCSevere WeatherN/A50,000Weather
2011-08-2812:10 PM8/28/201112:11 PMEastern MassachusettsNPCCSevere WeatherN/A50,000Weather
2011-08-287:00 AM9/3/201112:01 AMNew YorkNPCCSevere WeatherUNK99,700Weather
2011-08-289:42 AM8/30/201112:01 AMEastern New YorkNPCCSevere WeatherN/A100,000Weather
2011-08-2812:30 PM8/28/201112:31 PMNew YorkNPCCSevere WeatherN/A116,000Weather
2011-08-285:00 AM8/30/20115:00 AMLong Island, New YorkNPCCSevere WeatherUNK152,261Weather
2011-08-287:40 AM8/29/20117:40 AMSouthwest ConnecticutNPCCSevere WeatherN/A158,000Weather
2011-08-2812:01 AM8/30/201112:01 AMMid-Hudson, New YorkNPCCSevere WeatherN/A180,000Weather
2011-08-282:58 AM8/30/20112:58 AMEastern and Northeastern PennsylvaniaRFCSevere Weather110284,000Weather
2011-08-2812:30 AM8/30/201112:30 AMNorthern and Central New JerseyRFCSevere WeatherN/A650,000Weather
2011-08-2812:23 AM8/30/201112:23 AMNew JerseyRFCSevere Weather500665,000Weather
2011-08-3112:52 PM8/31/201112:52 PMSouthwest OhioRFCSuspected Physical Attack00Physical Attack
2011-09-018:13 AM9/1/20114:00 PMGraham Substaion, WashingtonWECCVandalismN/AN/APhysical Attack
2011-09-032:00 PM9/8/20116:00 PMSoutheast Lower Peninsula, MichiganRFCSevere WeatherUNK105,000Weather
2011-09-054:30 PM9/7/20113:45 PMAlabama; GeorgiaSERCSevere Weather17753,295Weather
2011-09-0712:08 AM9/7/201110:50 AMWestern Connecticut; New YorkNPCCActual Physical Attack00Physical Attack
2011-09-083:28 PM9/10/20113:30 PMArizona; CaliforniaWECCTransmission/Distribution Interruption; Load Shed; Generation Inadequacy7,0002,000,000Generation Interruption
2011-09-087:53 PM9/9/20114:00 PMCollins Substation, Tacoma, WashingtonWECCVandalismN/AN/APhysical Attack
2011-09-129:15 AM9/12/20113:30 PMEnglish Creek, New JerseyRFCVandalism00Physical Attack
2011-09-132:03 PM9/13/20116:21 PMSaranac, New YorkNPCCVandalismN/A0Physical Attack
2011-09-1311:43 AM9/14/20114:00 PMLacamas Substation, Roy, WashingtonWECCVandalismN/AN/APhysical Attack
2011-09-149:00 AM9/14/20112:00 PMSalt Lake County, UtahWECCVandalism00Physical Attack
2011-09-2012:55 PM9/20/20115:00 PMLacamas Substaion, WashingtonWECCVandalismN/AN/APhysical Attack
2011-09-212:37 PM9/21/20113:47 PMPuerto RicoN/AGeneration Inadequacy; Load Shed600319,616Generation Interruption
2011-09-2110:30 AM9/21/201110:30 AMHockessin, DelawareRFCSuspected Physical Attack00Physical Attack
2011-09-222:50 PM9/22/20112:51 PMMontgomery County, OhioRFCVandalismN/A0Physical Attack
2011-09-239:04 AM9/23/20119:04 AMNorth Haven, ConnecticutNPCCVandalism00Physical Attack
2011-09-244:17 PM9/25/20114:00 PMCollins Substation, Tacoma, WashingtonWECCVandalismN/AN/APhysical Attack
2011-09-2610:15 AM9/26/201110:15 AMMcKee City, New JerseyRFCVandalism00Physical Attack
2011-09-282:59 PM9/28/20112:59 PMDorothy, New JerseyRFCVandalism00Physical Attack
2011-09-284:41 PM9/28/20114:41 PMBethany Beach, DelawareRFCSuspected Physical Attack00Physical Attack
2011-09-289:30 AM9/28/20111:00 PMWatertown, ConnecticutNPCCVandalismN/AN/APhysical Attack
2011-09-296:44 PM9/30/20114:00 PMCollins Substation, Tacoma, WashingtonWECCVandalismN/AN/APhysical Attack
2011-09-295:00 AM9/30/20116:00 AMHouston metro area, TexasTRESevere WeatherN/A65,000Weather
2011-09-308:22 AM9/30/20118:22 AMWilmington, DelawareRFCSuspected Physical Attack00Physical Attack
2011-10-0611:07 AM10/6/201111:07 AMOquirrh Substation, UtahWECCVandalism00Physical Attack
2011-10-078:04 AM10/7/20114:00 PMOlympic Pipeline, Spanaway, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2011-10-142:20 PM10/14/20112:20 PMEnglish Creek, New JerseyRFCVandalism00Physical Attack
2011-10-173:34 AM10/17/201110:42 AMSeat Pleasant, MarylandRFCVandalism00Physical Attack
2011-10-173:44 PM10/17/20113:44 PMSouthwest OhioRFCVandalism72,000Physical Attack
2011-10-183:45 AM10/18/20115:25 AMHolmesburg Substation, Philadelphia, PennsylvaniaRFCSuspected Physical Attack00Physical Attack
2011-10-207:15 AM10/20/20117:15 AMMcKee, New JerseyRFCVandalism00Physical Attack
2011-10-2411:37 PM10/26/201111:00 PMHolmesburg Substation, Philadelphia, PennsylvaniaRFCSuspected Physical Attack00Physical Attack
2011-10-265:00 AM10/27/20113:00 PMDenver; Ft. Collins, ColoradoWECCSevere WeatherUNK204,000Weather
2011-10-271:00 AM10/27/20112:36 AMMunster, IndianaRFCVandalismN/AN/APhysical Attack
2011-10-298:59 AM11/7/20113:00 PMPennsylvaniaRFCSevere WeatherUNK50,000Weather
2011-10-294:16 PM11/2/20119:30 PMNew York City areaNPCCSevere WeatherUNK50,000Weather
2011-10-298:00 PM10/31/20118:00 PMNew Jersey; New YorkNPCC, RFCSevere WeatherN/A74,000Weather
2011-10-292:00 PM10/31/201114:00Southeast PennsylvaniaRFCSevere WeatherUNK109,335Weather
2011-10-293:00 PM11/2/20118:15 AMMid-Hudson Valley Region, New YorkNPCCSevere WeatherN/A145,000Weather
2011-10-2912:57 PM11/3/201111:00 PMHarrisburg, Lehigh Valley, Lancaster Region PennsylvaniaRFCSevere WeatherUNK146,721Weather
2011-10-2911:18 AM11/4/201112:00 AMSoutheast New YorkNPCCSevere WeatherUNK161,151Weather
2011-10-292:30 PM11/6/201112:00 PMNew JerseyRFCSevere Weather125197,000Weather
2011-10-298:59 AM11/7/20117:58 PMPennsylvaniaRFCSevere WeatherUNK312,359Weather
2011-10-299:59 AM11/7/20111:00 PMNorthwest and Central New JerseyRFCSevere WeatherUNK379,000Weather
2011-10-294:14 PM11/7/20114:00 PMConnecticut; Maine; Massachusetts; New Hampshire; Rhode IslandNPCCSevere WeatherUNK1,418,100Weather
2011-11-0410:46 AM11/4/201110:46 AMSweetwater County, WyomingWECCVandalism00Physical Attack
2011-11-1311:30 AM11/13/201112:00 PMCate Road, Deerfield, New HampshireNPCCVandalism00Physical Attack
2011-11-142:24 PM11/14/20112:24 PMMcKee, New JerseyRFCVandalism00Physical Attack
2011-11-2211:16 PM11/22/201111:16 PMIndianaRFCSuspected Physical Attack00Physical Attack
2011-11-3010:00 AM11/30/201111:00 AMOrchard Substation, WashingtonWECCVandalism00Physical Attack
2011-11-304:56 PM12/2/201110:00 AMCity of Los Angeles, CaliforniaWECCSevere WeatherUNK150,000Weather
2011-12-0110:00 AM12/2/20111:11 PMWasatch Front Area UtahWECCSevere WeatherUNK60,000Weather
2011-12-0112:45 AM12/7/20119:00 PMSouthern CaliforniaWECCSevere WeatherUNK91,690Weather
2011-12-013:29 AM12/2/20111:05 PMNorthern CaliforniaWECCSevere Weather300100,000Weather
2011-12-024:15 PM12/2/20118:30 PMRusk County TexasTRESuspected Physical AttackN/AN/APhysical Attack
2011-12-052:00 PM12/6/20115:00 PMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2011-12-065:38 PM12/7/201111:04 AMMontague, MichiganRFCSuspected Physical Attack00Physical Attack
2011-12-068:00 AM12/6/20118:00 PMBismarck-Mandan, North DakotaMROPublic Appeal to Reduce Electricity Usage15534,500Public Appeal
2011-12-077:29 PM12/7/201110:57 PMCentral VirginiaSERCSevere Weather24060,000Weather
2011-12-088:45 AM12/8/20114:30 PMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2011-12-133:19 AM12/14/20113:19 AMClinton County OhioRFCSuspected Physical AttackN/A0Physical Attack
2011-12-198:48 AM12/19/20114:00 PMCroft Substation, Tacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2011-12-207:45 AM12/20/20118:45 AMSweet Home, OregonWECCSuspected Physical Attack122,500Physical Attack
2011-12-209:30 AM12/20/20119:31 AMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2011-12-2110:30 AM12/21/201110:30 AMBoise, IdahoWECCSuspected Cyber Attack00Cyber Attack
2011-12-319:26 PM12/31/20119:26 PMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-01-0412:14 PM1/4/201212:14 PMTacoma, WashingtonWECCSuspected physical attackN/AN/APhysical Attack
2012-01-0510:35 AM1/5/201212:25 PMCSWS/AEP West territory, OklahomaSPPSabotage00Physical Attack
2012-01-0510:28 AM1/5/201212:25 PMCreek County, OklahomaSPPSuspected physical attackN/AN/APhysical Attack
2012-01-091:36 PM1/11/20121:05 AMLouisianaSERCLoad Shed1501Load Shed
2012-01-092:30 PM1/9/20123:30 PMWatertown, ConnecticutNPCCVandalismN/AN/APhysical Attack
2012-01-109:30 PM1/10/20129:30 PMRusk County, TexasTREVandalismN/AN/APhysical Attack
2012-01-117:19 AM1/11/20129:07 AMNevadaWECCSuspected Physical Attack00Physical Attack
2012-01-128:26 AM1/12/20128:26 AMNewark, DelawareRFCPhysical Attack00Physical Attack
2012-01-139:20 AM1/13/20129:20 AMNewark, DelawareRFCPhysical Attack00Physical Attack
2012-01-159:35 AM1/15/20129:35 AMTacoma, WashingtonWECCVandalismN/AN/APhysical Attack
2012-01-1710:31 AM1/17/20125:21 PMAustin, TexasTRESuspected Cyber AttackN/A0Cyber Attack
2012-01-197:00 AM1/20/20123:00 PMKing, Pierce and Thurston Counties, WashingtonWECCSevere Weather - Winter Storm1,600426,000Weather
2012-01-2411:22 AM1/24/201211:22 AMTacoma, WashingtonWECCVandalismN/AN/APhysical Attack
2012-01-279:40 AM1/27/20129:40 AMFrederickson Substation, Spanaway, WashingtonWECCVandalismN/AN/APhysical Attack
2012-01-2912:45 PM1/29/201212:45 PMRoosevelt Substation, Tacoma, WashingtonWECCVandalismN/AN/APhysical Attack
2012-02-118:47 AM2/11/201210:30 AMLamar, ColoradoWECCSuspected Physical Attack00Physical Attack
2012-02-118:55 AM2/11/20128:55 AMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-02-137:02 AM2/13/20124:25 PMAsheville, North CarolinaSERCSuspected Physical AttackN/AN/APhysical Attack
2012-02-147:20 PM2/15/20124:00 PMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-02-155:33 AM2/15/20125:30 PMPort Orchard, WashingtonWECCSuspected Physical Attack00Physical Attack
2012-02-173:00 AM2/17/201211:33 AMLittle Rock, ArkansasSERCSuspected Cyber AttackUNKUNKCyber Attack
2012-02-195:00 PM2/21/20127:33 AMKentucky, Virginia, West VirginiaSERCSevere Weather - Winter StormUNK90,000Weather
2012-02-235:45 AM2/23/20123:02 PMSouth East College Station, TexasTRESuspected Physical Attack00Physical Attack
2012-02-2311:12 PM2/24/20121:00 AMLondonderry, New HampshireNPCCSuspected Physical Attack00Physical Attack
2012-02-2411:24 AM2/24/201211:49 AMSpanaway, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-02-282:59 AM2/28/20126:12 AMSacramento, CaliforniaWECCElectrical System Separation (Islanding)11Islanding
2012-02-287:00 AM2/28/20127:00 AMCoos County OregonWECCSuspected Physical AttackUNKUNKPhysical Attack
2012-03-021:45 PM3/2/20123:30 PMPiggott, ArkansasSERCOperational Failure/Equipment MalfunctionN/AN/AEquipment
2012-03-029:00 PM3/5/20124:30 PMSoutheastern, MichiganRFCSevere Weather - Winter Storm371130,000Weather
2012-03-029:00 PM3/4/20125:30 PMLower Peninsula, MichiganRFCSevere Weather - Winter Storm50140,000Weather
2012-03-0212:37 PM3/5/201212:01 PMNorthern Alabama; Southeast TennesseeSERCSevere Weather - Tornadoes500UNKWeather
2012-03-041:27 AM3/4/20126:58 AMPrince Georges County, MarylandRFCSuspected Physical AttackN/AN/APhysical Attack
2012-03-041:38 PM3/5/201211:00 AMTexasSERCSuspected Physical AttackUNKUNKPhysical Attack
2012-03-164:00 PM3/16/20124:00 PMNew Castle, DelawareRFCSuspected Physical Attack00Physical Attack
2012-03-208:00 AM3/20/20121:00 PMHouston, TexasTRESevere Weather - ThunderstormsN/A96,000Weather
2012-03-237:34 PM3/23/20127:34 PMNewark, DelawareRFCSuspected Physical Attack00Physical Attack
2012-03-261:24 PM3/26/20121:24 PMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-03-2810:17 AM3/28/201210:17 AMGraham, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-03-2912:01 PM3/29/201212:02 PMLansing, MichiganRFCElectrical System Separation (Islanding)UNK0Islanding
2012-03-3011:10 AM3/30/201211:30 AMVermontNPCCSuspected Physical AttackN/AN/APhysical Attack
2012-04-018:27 PM4/3/20128:28 AMCouncil Bluffs, IowaMROVandalism00Physical Attack
2012-04-0311:10 AM4/3/201211:25 AMWest Rutland, VermontNPCCVandalism00Physical Attack
2012-04-033:33 PM4/3/20128:25 PMSeattle, WashingtonWECCPhysical Attack00Physical Attack
2012-04-043:32 PM4/6/20123:30 PMWAPA-SNR Regional Office, CaliforniaWECCSuspected Physical AttackN/AN/APhysical Attack
2012-04-079:31 AM4/7/20129:32 AMNewark, DelawareRFCPhysical Attack00Physical Attack
2012-04-0712:25 PM4/7/201212:26 PMNewark, DelawareRFCPhysical Attack00Physical Attack
2012-04-072:35 PM4/7/20122:36 PMNewark, DelawareRFCPhysical Attack00Physical Attack
2012-04-119:00 AM4/11/20129:00 AMNorth Attleboro, Massachusetts NPCCVandalism00Physical Attack
2012-04-128:08 AM4/12/20124:30 PMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-04-157:38 PM4/15/20129:26 PMGeorgiaSERCSuspected Physical AttackUNKUNKPhysical Attack
2012-04-163:46 PM4/19/20122:00 AMSoutheast, MichiganRFCSevere Weather - High Winds218111,393Weather
2012-04-176:11 AM4/17/20125:48 PMSan Diego County, CaliforniaWECCSuspected Physical Attack00Physical Attack
2012-04-197:53 AM4/19/20124:00 PMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-04-202:27 PM4/21/20124:27 AMMetropolitan Houston, TexasTRESevere Weather - ThunderstormsN/A120,377Weather
2012-04-213:02 PM4/21/20128:09 PMEast Bridgewater, MassachusettsNPCCPhysical AttackN/AN/APhysical Attack
2012-04-218:55 PM4/23/20124:30 PMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-04-238:11 AM4/23/201212:47 PMNorthwest IndianaRFCSuspected Physical AttackN/AN/APhysical Attack
2012-04-2311:56 AM4/23/20123:35 PMSnohomish County, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-05-0712:50 PM5/7/20122:00 PMWilliston, VermontNPCCVandalism00Physical Attack
2012-05-075:45 PM5/7/20126:06 PMEastern OhioRFCLoad Shed/Severe Weather - Lightning Storm4201Weather
2012-05-1111:05 AM5/11/201211:20 AMLakewood, WashingtonWECCVandalismN/AN/APhysical Attack
2012-05-243:20 PM5/25/20125:29 PMTyngsborough, MassachusettsNPCCPhysical AttackUNKUNKPhysical Attack
2012-05-298:35 PM5/31/201210:00 AMOklahoma City Metro Area, OklahomaSPPSevere Weather - ThunderstormsUNK112,000Weather
2012-05-296:30 PM5/29/20127:40 PMAlder Dam, Pierce County, WashingtonWECCPhysical AttackN/AN/AWeather
2012-05-3111:45 PM6/1/20124:30 AMColumbus, OhioRFCPhysical Attack00Physical Attack
2012-06-027:30 AM6/2/201211:35 AMSan Francisco, CaliforniaWECCVandalismN/AN/APhysical Attack
2012-06-0612:37 PM6/6/201212:37 PMColumbia Heights, NW, Washington DCRFCVandalism00Physical Attack
2012-06-068:00 AM6/6/20128:00 AMDelhi, New YorkNPCCVandalismN/AN/APhysical Attack
2012-06-085:20 PM6/8/20125:25 PMDenver Metro Area, ColoradoWECCLoad Shed12030,379Load Shed
2012-06-117:50 PM6/12/20123:00 PMNorth/Central Alabama; North/Central GeorgiaSERCSevere Weather - Thunderstorms368110,591Weather
2012-06-123:57 PM6/14/20124:57 AMHouston, TexasTRESevere Weather - Thunderstorms920175,000Weather
2012-06-134:55 PM6/13/201210:09 PMSan Juan County, New MexicoWECCVandalism00Physical Attack
2012-06-195:30 AM6/21/20125:30 AMCAISO Territory CaliforniaWECCFuel Supply Deficiency (Water)UNKUNKFuel Supply Deficiency
2012-06-194:30 AM6/20/201211:00 PMMinneapolis/St. Paul, MinnesotaMROSevere Weather - ThunderstormsUNK68,200Weather
2012-06-236:57 PM6/23/20127:28 PMNorth Shore, MassachusettsNPCCLoad Shed5129,250Load Shed
2012-06-254:04 PM6/26/20121:45 PMCentral VirginiaSERCSevere Weather - Wind & Rain600190,000Weather
2012-06-2912:10 PM6/29/20125:02 PMPuerto RicoN/AEquipment Trip & Failure1,800900,000Equipment
2012-06-2910:45 AM6/29/201210:45 AMNew Castle, DelawareRFCPhysical Attack00Physical Attack
2012-06-294:00 PM6/29/20129:00 PMEastern, ArkansasSERCPublic Appeal to Reduce Electricity Usage457,935Public Appeal
2012-06-2911:30 PM6/30/20122:00 AMNortheast IllinoisRFCSevere Weather - ThunderstormsUNK109,000Weather
2012-06-297:00 PM7/7/20127:43 PMMaryland; West VirginiaRFCSevere Weather - ThunderstormsUNK145,000Weather
2012-06-292:10 PM7/4/20126:00 PMDayton, OhioRFCSevere Weather - Thunderstorms500175,000Weather
2012-06-296:24 PM7/6/201210:00 AMWest VirginiaRFCSevere Weather - Thunderstorms700265,000Weather
2012-06-2910:15 PM7/5/201212:52 PMMontgomery and Prince Georges Counties, Maryland; District of ColumbiaRFCSevere Weather - Thunderstorms3,000425,000Weather
2012-06-2910:43 PM7/5/201211:50 AMGreater Baltimore area, MarylandRFCSevere Weather - Thunderstorms1,465600,000Weather
2012-06-2910:29 PM7/4/20123:36 PMVirginiaSERCSevere Weather - Thunderstorms5,000880,000Weather
2012-06-294:00 PM7/2/20124:00 PMIndiana; Michigan; Ohio; West VirginiaRFCSevere Weather - ThunderstormsUNK1,355,919Weather
2012-06-295:15 PM7/2/201211:59 PMEastern Indiana; Northern Kentucky; Greater Cincinnati area OhioRFCSevere Weather - Thunderstorms2,9464,645,572Weather
2012-06-303:00 PM7/2/201212:00 PMNortheast TennesseeSERCPublic Appeal to Reduce Electricity UsageUNKUNKPublic Appeal
2012-06-3010:30 PM7/2/20128:11 AMCalvert, Charles, St. Mary's, Prince Georges Counties MarylandRFCSevere Weather - Thunderstorms35460,000Weather
2012-06-301:00 AM7/3/20121:00 AMDelaware; MarylandRFCSevere Weather - Thunderstorms086,390Weather
2012-06-301:15 AM7/7/20125:33 PMAtlantic City Electric Service Territory New JerseyRFCSevere Weather - ThunderstormsUNK205,000Weather
2012-07-011:00 PM7/3/20123:00 PMIllinoisRFCSevere Weather - ThunderstormsUnknown320,000Weather
2012-07-014:47 PM7/1/201211:00 PMTarboro, North CarolinaSERCOperational Failure; Storm Damage486,100Weather
2012-07-015:45 PM7/1/201210:15 PMNorthern, Central and Eastern North CarolinaSERCSevere WeatherUnknown69,106Weather
2012-07-0512:00 AM7/6/20128:30 PMLower Peninsula MichiganRFCSevere Weather - ThunderstormsUnknown111,000Weather
2012-07-057:00 PM7/6/20124:00 PMNortheast TennesseeSERCSevere Weather - Wind & StormsN/A50,001Weather
2012-07-063:05 PM7/6/20123:06 PMTacoma, WashingtonWECCVandalismN/AN/APhysical Attack
2012-07-074:00 AM7/10/20124:00 AMCAISO CaliforniaWECCFuel Supply Deficiency (Water)Unknown0Fuel Supply Deficiency
2012-07-076:06 AM7/9/201211:00 PMLower Valley, Central, Susquehanna Regions PennsylvaniaRFCSevere Weather - ThunderstormsN/A64,500Weather
2012-07-076:00 PM7/9/20127:01 PMCentral and Northern New JerseyRFCSevere Weather - ThunderstormsN/A95,400Weather
2012-07-0912:15 PM7/9/20124:14 PMAlberta, CanadaWECCEnergy Deficiency Alert9896UnknownFuel Supply Deficiency
2012-07-1611:27 AM7/16/201212:29 PMLittle Rock, ArkansasSPPPublic Appeal to Reduce Energy UsageN/AN/APublic Appeal
2012-07-182:16 PM7/19/201211:58 PMSoutheast Ohio, Northern Kentucky, Southern IndianaRFCSevere Weather - Thunderstorms480103,000Weather
2012-07-184:20 PM7/18/20127:05 PMEastern OhioRFCSevere Weather - ThunderstormsUnknown67,000Weather
2012-07-1811:00 PM7/19/20126:00 AMNorthern IllinoisRFCSevere Weather - ThunderstormsUnknown181,000Weather
2012-07-1910:30 AM7/31/201211:00 AMNiagara County, New YorkNPCCFuel Supply Deficiency (Coal)675UnknownFuel Supply Deficiency
2012-07-1912:32 PM7/19/201212:33 PMNewark, DelawareRFCVandalismN/AN/APhysical Attack
2012-07-212:19 AM7/21/20125:20 AMCity of Lubbock, TexasSPPSevere Weather; Equipment Failure22070,000Weather
2012-07-247:01 AM7/24/20124:30 PMNorthern IndianaRFCSevere Weather - ThunderstormsN/A82,621Weather
2012-07-247:30 AM7/24/201210:00 PMNorthern IllinoisRFCSevere Weather - ThunderstormsUnknown330,000Weather
2012-07-266:14 PM7/27/20126:14 PMWestern PennsylvaniaRFCSevere Weather - ThunderstormsN/A65,112Weather
2012-07-266:21 PM7/28/201211:30 PMNorth/Central PennsylvaniaRFCSevere Weather - ThunderstormsN/A65,000Weather
2012-07-266:30 PM7/27/20125:22 PMEastern OhioRFCSevere Weather - ThunderstormsUnknown57,054Weather
2012-07-275:19 PM7/28/20125:19 PMCentral IndianaRFCSevere Weather - ThunderstormsUnknown52,702Weather
2012-08-0112:00 PM8/1/201212:00 PMOklahoma, ArkansasSPPPublic Appeal to Reduce Electricity UsageUnknownUnknownPublic Appeal
2012-08-043:55 AM8/4/20124:21 AMTemblor Substation in McKittrick, CaliforniaWECCElectrical System Separation (Islanding)5127Islanding
2012-08-044:00 AM8/4/20127:20 AMNorthern IndianaRFCSevere Weather - ThunderstormsN/A61,413Weather
2012-08-045:30 PM8/5/201212:10 PMNortheast IllinoisRFCSevere Weather - ThunderstormsUnknown325,000Weather
2012-08-1112:45 PM8/11/20125:00 PMTacoma, WashingtonWECCSuspected Physical AttackN/AN/APhysical Attack
2012-08-131:15 PM8/13/20121:15 PMKnoxville, TennesseeSERCVandalismUnknownUnknownPhysical Attack
2012-08-133:52 PM8/13/20127:44 PMCFE (Mexico & U.S.)WECCSevere Weather - Dust Storm; Load Shed Event655UnknownWeather
2012-08-161:13 PM8/16/20121:13 PMNorthern IndianaRFCVandalism00Physical Attack
2012-08-198:42 AM8/19/201212:08 PMEl Paso, TexasWECCSuspected Physical Attack123,314Physical Attack
2012-08-2610:04 PM8/27/20122:04 AMFloridaFRCCSevere Weather - TS IsaacN/A440,000Weather
2012-08-286:00 AM9/4/20128:00 AMArkansas, Louisiana, MississippiSERCSevere Weather - Hurricane IsaacUnknown770,000Weather
2012-08-296:53 AM8/30/20122:00 PMLouisianaSERCSevere Weather - Hurricane Isaac15068,018Weather
2012-08-299:00 AM8/31/201212:00 PMLouisianaSERCSevere Weather - Hurricane Isaac30050,000Weather
2012-08-299:48 AM8/31/201212:55 PMLouisianaSPPSevere Weather - Hurricane IsaacUnknown95,000Weather
2012-09-0510:56 AM9/5/201211:27 AMAlberta, CanadaWECCElectrical System Separation (Islanding)00Islanding
2012-09-064:45 AMOngoingOngoingOroville, CaliforniaWECCFuel Supply Deficiency (Water)N/AN/AFuel Supply Deficiency
2012-09-079:30 PM9/8/20121:00 AMArkansasSERCSevere Weather - ThunderstormsUNK64,951Weather
2012-09-083:40 PM9/8/20126:45 PMPrince George's County, Montgomery County Maryland; D.C.RFCSevere Weather - ThunderstormsUNK65,000Weather
2012-09-083:53 PM9/9/20127:46 PMVirginiaSERCSevere Weather - Thunderstorms475119,000Weather
2012-09-111:00 PM9/11/20121:58 PMAlberta, CanadaWECCElectrical System Separation (Islanding)00Islanding
2012-09-2412:00 AM9/25/201212:00 AMBrighton, MarylandRFCSuspected Physical Attack00Physical Attack
2012-09-269:16 PM9/26/201210:18 PMPuerto RicoN/AVoltage Reduction600371,526?
2012-10-055:30 PM10/5/20125:50 PMGreater Sacramento, CaliforniaWECCSuspected Physical AttackN/AN/APhysical Attack
2012-10-0912:00 AM10/9/201212:01 AMSeat Pleasant, MarylandRFCVandalism00Physical Attack
2012-10-1112:00 AM10/11/201212:01 AMSeat Pleasant, MarylandRFCVandalism00Physical Attack
2012-10-1410:36 AM10/14/201210:50 AMNorthern CaliforniaWECCElectrical System Separation (Islanding)32,035Islanding
2012-10-152:15 PM10/15/20122:16 PMSoutheast VermontNPCCVandalism; Theft00Physical Attack
2012-10-2212:00 AM10/22/201212:01 AMNorbeck, MarylandRFCPhysical Attack; Vandalism00Physical Attack
2012-10-239:10 AM10/23/20129:16 AMCrawfordsville, IndianaRFCTransmission System Interruption499,800Transmission Interruption
2012-10-2412:00 AM10/24/201212:01 AMKingswood, MarylandRFCPhysical Attack; Vandalism00Physical Attack
2012-10-2412:00 AM10/24/201212:01 AMBrighton, MarylandRFCSuspected Physical Attack00Physical Attack
2012-10-243:15 PM10/24/20123:16 PMFrankford, DelawareRFCPhysical Attack; Vandalism00Physical Attack
2012-10-2512:00 AM10/25/201212:01 AMWest Lanham, MarylandRFCPhysical Attack; VandalismN/AN/APhysical Attack
2012-10-252:39 PM10/25/20126:00 PMPueblo, ColoradoWECCPhysical Attack; Vandalism00Physical Attack
2012-10-256:51 PM10/25/20127:30 PMNewark, DelawareRFCPhysical Attack; Vandalism00Physical Attack
2012-10-2912:00 AM11/9/201211:59 PMWest VirginiaRFCSevere Weather - Hurricane Sandy0208,000Weather
2012-10-298:00 AM11/4/201211:00 PMNew JerseyRFCSevere Weather - Hurricane SandyUnknownUnknownWeather
2012-10-299:00 AM10/29/20129:01 AMLaGrande, WashingtonWECCPhysical Attack; Vandalism00Physical Attack
2012-10-299:00 AM11/2/20126:00 PMDelaware, MarylandRFCSevere Weather - Hurricane SandyUnknown70,000Weather
2012-10-2912:00 PM11/4/201211:00 PMNew JerseyRFCSevere Weather - Hurricane SandyUnknown217,000Weather
2012-10-291:00 PM11/12/20122:00 PMLong Island, New YorkNPCCSevere Weather - Hurricane Sandy0632,816Weather
2012-10-292:40 PM10/30/20126:16 PMBoston, Southeast MassachusettsNPCCSevere Weather - Hurricane SandyUnknown50,000Weather
2012-10-292:45 PM11/1/20121:30 AMEastern MassachusettsNPCCSevere Weather - Hurricane SandyUnknown50,000Weather
2012-10-293:00 PM10/29/20123:01 PMLas Vegas, NevadaWECCSuspected Physical AttackN/AN/APhysical Attack
2012-10-293:15 PM11/4/20128:00 PMConnecticut, Western MassachusettsNPCCSevere Weather - Hurricane Sandy0649,075Weather
2012-10-294:00 PM11/8/20125:08 PMMaryland; West VirginiaRFCSevere Weather - Hurricane SandyUnknown150,000Weather
2012-10-294:00 PM11/7/201211:48 PMEastern PennsylvaniaRFCSevere Weather - Hurricane Sandy0270,000Weather
2012-10-294:00 PM11/5/201211:59 PMGreater Cleveland OhioRFCSevere Weather - Hurricane Sandy0346,000Weather
2012-10-294:01 PM11/8/20127:00 PMGreater New York City, New YorkNPCCSevere Weather - Hurricane Sandy0818,000Weather
2012-10-294:03 PM11/6/201212:00 PMNew JerseyNPCCSevere Weather - Hurricane SandyUnknown50,000Weather
2012-10-294:45 PM10/31/201211:00 AMNew HampshireNPCCSevere Weather - Hurricane SandyN/A50,000Weather
2012-10-295:13 PM10/31/201211:00 AMGreater Baltimore MarylandRFCSevere Weather - Hurricane Sandy0219,000Weather
2012-10-295:30 PM11/6/201212:00 AMGreater Philadelphia PennsylvaniaRFCSevere Weather - Hurricane SandyUnknown850,000Weather
2012-10-296:11 PM11/4/201210:50 PMCentral PennsylvaniaRFCSevere Weather - Hurricane SandyUnknown400,000Weather
2012-10-296:12 PM10/30/20127:35 PMVirginiaRFCSevere Weather - Hurricane Sandy520156,000Weather
2012-10-296:46 PM11/3/201210:45 AMSoutheast New York; New JerseyNPCC; RFCSevere Weather - Hurricane SandyUnknown200,000Weather
2012-10-296:48 PM11/4/201211:36 AMNew YorkNPSevere Weather - Hurricane SandyUnknown371,000Weather
2012-10-297:00 PM11/2/20125:00 AMIndiana; Kentucky; Michigan; OhioRFC; SERCSevere Weather - Nor'easterUnknown173,273Weather
2012-10-297:15 PM10/30/20123:02 PMSoutheast and Seacoast MaineNPCCSevere Weather - Hurricane SandyUnknown50,000Weather
2012-10-3012:00 AM10/30/201212:02 AMHyattsville, MarylandRFCPhysical Attack; Vandalism00Physical Attack
2012-10-302:00 AM11/1/201210:00 PMGreater Detroit MichiganRFCSevere Weather - Nor'easterUnknown133,777Weather
2012-10-301:20 PM10/30/20121:25 PMFitzwilliam, New HampshireNPCCVandalism00Physical Attack
2012-10-303:00 PM10/30/20123:01 PMPueblo, ColoradoWECCPhysical Attack; VandalismUnknownUnknownPhysical Attack
2012-11-029:30 AM11/2/201212:10 PMConcord, VermontNPCCPhysical Attack; Vandalism00Physical Attack
2012-11-072:21 PM11/7/20122:48 PMNew HampshireNPCCPhysical Attack; Vandalism00Physical Attack
2012-11-089:34 AM11/8/20129:35 AMBishopville, MarylandRFCPhysical Attack; Vandalism00Physical Attack
2012-11-159:09 PM11/15/20129:26 PMIowa; MichiganMROSuspected Cyber AttackUnknownUnknownCyber Attack
2012-11-155:38 AM11/15/20125:39 AMSoutheast MassachusettsNPCCPhysical Attack; Vandalism00Physical Attack
2012-11-1710:00 AM11/18/201210:00 AMComanche Peak, TexasTREFuel Supply Deficiency1,2310Fuel Supply Deficiency
2012-11-212:50 PM11/21/20122:51 PMBethany Beach, DelawareRFCPhysical Attack; VandalismN/AN/APhysical Attack
2012-11-2612:37 PM11/26/201212:38 PMFrankfort, DelawareRFCPhysical Attack; Vandalism00Physical Attack
2012-11-263:07 PM11/26/20123:08 PMGeorgetown, DelawareRFCPhysical Attack; VandalismN/AN/APhysical Attack
2012-11-271:07 PM11/27/20121:40 PMNew HampshireNPCCPhysical Attack; Vandalism00Physical Attack
2012-12-025:20 AM12/4/20129:00 AMNorthern CaliforniaWECCSevere Weather - Winter Storm250125,000Weather
2012-12-0312:02 PM12/3/201212:30 PMTacoma, WashingtonWECCSuspected Physical Attack00Physical Attack
2012-12-069:18 PM12/6/20129:31 PMGreater San Jose, CaliforniaWECCLoad Shed390UnknownLoad Shed
2012-12-176:55 AM12/17/20127:00 AMTacoma, WashingtonWECCSuspected Physical Attack00Physical Attack
2012-12-2512:45 AM12/28/20124:15 PMArkansas; Louisiana; Mississippi; TexasSPPSevere Weather - Winter StormUnknown242,509Weather
2012-12-259:28 AM12/26/20124:28 PMHouston, TexasTRESevere Weather - Cold Front, High Winds294262,000Weather
2012-12-262:50 PM12/26/20127:40 PMStantonsburg, North CarolinaSERCSevere Weather - Thunderstorm31,200Weather
2012-12-312:21 PM12/31/20124:30 PMNorth CarolinaSERCTransmission Interruption4012,000Transmission Interruption
2013-01-0710:43 AM1/7/201310:43 AMDenton, MarylandRFCPhyscial Attack; VandalismUnknownUnknownPhysical Attack
2013-01-164:45 PM1/16/20137:26 PMSan Juan County, New MexicoWECCSuspected Physical Attack00Physical Attack
2013-01-167:41 AM1/17/201310:58 AMWebster County, IowaMROPhysical AttackN/AN/APhysical Attack
2013-01-162:25 PM1/16/20132:25 PMDenton, MarylandRFCPhyscial Attack; VandalismUnknownUnknownPhysical Attack
2013-01-178:35 PM1/17/20139:20 PMElizabeth City, North CarolinaSERCDistribution Interruption4012,000Distribution Interruption
2013-01-177:02 PM1/19/20136:00 PMNortheast TennesseeSERCSevere Weather - Winter StormUnknown80,000Weather
2013-01-176:07 PM1/20/20137:30 PMSouthwest Virginia, Southern West VirginiaRFCSevere Weather - Winter StormUnknown127,000Weather
2013-01-203:30 AM1/23/20136:15 AMSoutheastern MichiganRFCSevere Weather - Wind StormUnknown146,500Weather
2013-01-284:46 PM1/28/20136:00 PMTacoma Narrows Crossing, WashingtonWECCPhysical AttackUnknownUnknownPhysical Attack
2013-01-316:30 AM1/31/201310:00 AMConnecticutNPCCSevere Weather - Wind Storm7575,000Weather
2013-01-313:05 AM1/31/20134:48 AMCentral and Eastern VirginiaSERCSevere Weather - Wind Storm188119,000Weather
2013-02-029:15 PM2/2/201310:15 PMEl Paso, New MexicoWECCVandalismN/AN/APhysical Attack
2013-02-078:32 AM2/7/20139:47 AMCincinnati, OhioRFCVandalismUnknown0Physical Attack
2013-02-0811:38 AM2/8/20132:17 PMDistrict of Columbia; Prince George's County MarylandRFCEquipment Trip & Failure14052,000Equipment
2013-02-088:00 PM2/11/20138:30 PMCentral and eastern Massachusetts; Rhode IslandNPCCSevere Weather - Winter Storm NemoN/A50,000Weather
2013-02-088:55 PM2/12/20134:00 AMBoston area and Southeast MassachusettsNPCCSevere Weather - Winter Storm NemoUnknown50,000Weather
2013-02-098:30 AM2/9/20133:00 PMEl Paso, New MexicoWECCVandalism; Equipment FaultUnknownUnknownPhysical Attack
2013-02-107:46 PM2/10/20138:15 PMPuerto RicoN/AGenerator Trip; Voltage Reduction350UnknownEquipment
2013-02-135:39 PM2/15/20135:50 PMEastern MassachusettsNPCCFuel Supply Emergency - Petroleum11Fuel Supply Deficiency
February2013-02-139:30 AM2/13/20139:30 AMFort Washington, MarylandRFCVandalism11Physical Attack
2013-02-1512:00 AM2/15/201312:01 AMTuxedo, MarylandRFCVandalismN/AN/APhysical Attack
February2013-02-167:54 AM2/16/20137:54 AMPrince George's County MarylandRFCVandalism11Physical Attack
2013-02-194:01 PM2/20/201312:55 PMStockton, CaliforniaWECCElectrical System Separation (Islanding)13,8506,810Islanding
2013-02-2111:00 AM2/21/201311:30 AMLas Cruces, New MexicoWECCVandalismUnknownUnknownPhysical Attack
2013-02-261:00 PM3/1/201310:00 AMNorthern MissouriSERCSevere Weather - Winter Storm NemoUnknown56,444Weather
2013-03-034:27 PM3/3/20136:20 PMTacoma Park, MarylandRFCVandalismUnknownUnknownPhysical Attack
2013-03-036:39 AM3/3/201310:29 AMMerced County, CaliforniaWECCTransmission System Interruption30058,850Transmission Interruption
2013-03-049:49 AM3/4/201310:00 PMMetropolitan area Puerto RicoN/AEquipment Failure; Transmission System InterruptionUnknownUnknownTransmission Interruption
2013-03-068:22 AM3/7/201310:27 AMNorthwest VirginiaSERCSevere Weather - Winter Storm400233,000Weather
2013-03-185:21 AM3/18/20135:41 AMSystemwide Puerto RicoN/AGenerator Trip; Load Shed350262,937Equipment
2013-03-185:50 PM3/18/20136:07 PMNortheast FloridaFRCCSuspected Physical Attack00Physical Attack
2013-03-187:30 PM3/20/20132:30 PMNorth/Central Alabama; GeorgiaSERCSevere Weather - Thunderstorms800240,000Weather
2013-03-237:00 AM3/23/20139:00 AMConnecticutNPCCVandalismUnknownUnknownPhysical Attack
2013-03-2710:25 AM3/27/201312:19 PMWestern MassachusettsNPCCPhysical Attack; VandalismUnknownUnknownPhysical Attack
2013-03-281:01 PM3/28/20131:02 PMWilmington, DelawareRFCVandalismUnknownUnknownPhysical Attack
2013-03-2910:16 AM3/29/201310:17 AMMarylandRFCSuspected Physical AttackUnknownUnknownPhysical Attack
2013-04-018:40 AM4/1/20138:41 AMConnecticutNPCCVandalism - Copper Wire TheftUnknownUnknownPhysical Attack
2013-04-0311:05 AM4/3/20132:00 PMColorado Springs, ColoradoWECCSabotage; Vandalism00Physical Attack
2013-04-0911:30 AM4/9/201311:31 AMDelaware City, DelawareRFCVandalismN/AN/APhysical Attack
2013-04-161:47 AM4/18/20133:25 PMCaliforniaWECCLoss of Part of a High Voltage Substation, Physical AttackN/A0Physical Attack
2013-04-173:36 PM4/17/20134:53 PMColbert Steam Plant in Cherokee, AlabamaSERCSuspected Physical AttackUnknownUnknownPhysical Attack
2013-04-183:00 PM4/21/20133:30 AMSoutheast Michigan, MichiganRFCSevere Weather - Storms and WindUnknown99,188Weather
2013-04-212:11 AM4/21/201312:30 PMEast TennesseeSERCSuspected Physical AttackN/AN/APhysical Attack
2013-04-2312:49 AM4/23/20134:04 AMSouth of Humboldt, CaliforniaWECCElectrical System Separation (Islanding)801Islanding
2013-04-2311:00 AM4/23/201311:01 AMNewark, DelawareRFCVandalismUnknownUnknownPhysical Attack
2013-04-254:00 PM4/26/201310:55 AMSunol, CaliforniaWECCVandalism00Physical Attack
2013-05-019:22 AM5/1/20139:24 AMNortheast ColoradoWECCElectrical System Separation (Islanding)12335,230Islanding
2013-05-026:52 AM5/2/201310:07 AMUnknownWECCElectrical System Separation (Islanding)UnknownUnknownIslanding
2013-05-091:21 PM5/9/20134:21 PMAlberta, Canada; Washington StateWECCElectrical System Separation (Islanding)UnknownUnknownIslanding
2013-05-1312:52 PMOngoingOngoingCentral CaliforniaWECCFuel Supply Emergency - Hydro176UnknownFuel Supply Deficiency
2013-05-1412:01 AM5/14/20131:59 PMPortland, OregonWECCVandalism/TheftN/AN/APhysical Attack
2013-05-1410:25 AM5/14/201311:42 AMNew HampshireNPCCVandalismN/AN/APhysical Attack
2013-05-152:11 PM5/15/20132:12 PMWilmington, DelawareRFCVandalismUnknownUnknownPhysical Attack
2013-05-178:35 AM5/17/20138:36 AMNewcastle, DelawareRFCVandalismUnknownUnknownPhysical Attack
2013-05-205:22 PM5/20/20139:09 PMGonzales Area LouisianaSERCGenerator Trip; Load Shed 100+ MW10321,800Equipment
2013-05-203:00 PM5/22/20135:00 PMMoore, OklahomaSPPSevere Weather - TornadoesUnknown41,306Weather
2013-05-2210:51 AM5/22/201310:57 AMSystem wide Puerto RicoN/ASystem Wide Voltage Reduction280197,287?
2013-05-281:00 PM5/28/20136:00 PMMaineNPCCVandalism/TheftNoneNonePhysical Attack
2013-05-299:52 AM5/29/20139:53 AMWilmington, DelawareRFCVandalism/TheftN/AN/APhysical Attack
2013-05-2912:00 AM5/29/201312:02 AMHenrico County, VirginiaSERCPhysical AttackUnknownUnknownPhysical Attack
2013-05-298:58 PM5/31/20132:53 PMCentral and Eastern New YorkNPCCSevere Weather - ThunderstormsUnknown61,795Weather
2013-05-3010:15 AM5/30/201310:16 AMSaranac, New YorkNPCCVandalismN/AN/APhysical Attack
2013-05-317:07 PM6/1/20132:15 PMSoutheast Kansas, Northeast OklahomaMROTransmission System Interruption1026,300Transmission Interruption
2013-05-317:30 PM6/1/20138:00 PMSt. Louis Metro Area MissouriSERCSevere Weather - ThunderstormsUnknown100,000Weather
2013-05-316:00 PM6/4/201310:30 AMEl Reno, S. Oklahoma City, OklahomaSPPSevere Weather - TornadoesUnknown127,000Weather
2013-05-311:00 AM5/31/20131:30 AMMaumelle, ArkansasSPPSevere Weather - LightningN/AN/AWeather
2013-06-0312:50 PM6/3/20131:36 PMAlberta, CanadaWECCElectrical System Separation (Islanding)UnknownUnknownIslanding
2013-06-133:30 PM6/13/20134:00 PMDistrict of Columbia; MarylandRFCLoss of 300+ MW Load; Severe Weather - Thunderstorms70040,000Weather
2013-06-135:45 PM6/14/20136:30 PMCentral and Eastern North CarolinaSERCSevere Weather - ThunderstormsUnknown53,000Weather
2013-06-133:20 PM6/14/20139:10 PMOhio; Virginia; West VirginiaRFC; SERCSevere Weather - ThunderstormsUnknown90,247Weather
2013-06-138:47 PM6/14/201310:47 PMSouthern Company TerritorySERCSevere Weather - Thunderstorms550165,798Weather
2013-06-131:17 PM6/14/20135:35 PMWestern Piedmont North CarolinaSERCSevere Weather - Thunderstorms1,000175,000Weather
2013-06-134:08 PM6/14/20135:16 PMRichmond Metro area, VirginiaSERCSevere Weather - Thunderstorms900283,000Weather
2013-06-174:17 PM6/17/20136:49 PMHillsborough County FloridaFRCCLoad Shed of 100+ MW Under Emergency Operational Policy18037Load Shed
2013-06-183:51 PM6/18/20134:23 PMWyomingWECCElectrical System Separation (Islanding)6UnknownIslanding
2013-06-197:57 PM6/19/20138:09 PMAlberta, CanadaWECCElectrical System Separation (Islanding)UnknownUnknownIslanding
2013-06-206:00 PM6/21/201310:00 AMRichie Station (No. 123), MarylandRFCPhyscial Attack; VandalismUnknownUnknownPhysical Attack
2013-06-218:31 AM10/30/20132:09 PMMichigan, IowaMROSuspected Cyber AttackUnknownUnknownCyber Attack
2013-06-217:40 AM6/21/201312:14 PMPahrump NevadaWECCPhysical Attack; Vandalism & SabotageUnknown1,100Physical Attack
2013-06-2111:14 PM6/21/201311:15 PMNew Castle DelawareRFCPhysical Attack; VandalismUnknownUnknownPhysical Attack
2013-06-213:00 AM6/26/201312:00 PMMinnesotaMROSevere Weather - HailstormUnknown193,000Weather
2013-06-215:39 PM6/24/20136:00 AMMinneapolis/St. Paul area MinnesotaMROSevere Weather - HailstormUnknown400,000Weather
2013-06-224:59 AM6/22/20139:28 PMMedford OregonWECCPhysical Attack; VandalismN/AN/APhysical Attack
2013-06-224:12 PM6/22/20135:45 PMEastern MontanaWECCSuspected Physical AttackUnknownUnknownPhysical Attack
2013-06-239:20 PM6/24/20131:35 AMCentral Coast CaliforniaWECCSevere Weather - FogUnknown148,000Weather
2013-06-247:30 PM6/26/20135:00 PMIndianaRFCSevere Weather - ThunderstormsUnknown86,615Weather
2013-06-247:30 PM6/25/20135:46 PMIllinoisRFCSevere Weather - ThunderstormsUnknown283,451Weather
2013-06-271:10 AM6/27/20132:45 AMRichie Substation,Seat Pleasant, MarylandRFCPhysical Attack; VandalismUnknownUnknownPhysical Attack
2013-06-275:00 PM6/28/201312:00 AMSouth Eastern MichiganRFCSevere Weather - ThunderstormsUnknown138,000Weather
2013-06-286:02 PM6/28/20138:46 PMLos Angeles and Orange Counties, CaliforniaWECCEquipment Failure24065,255Equipment
2013-06-281:00 PM6/28/20131:01 PMVermontNPCCPhysical Attack; VandalismUnknownUnknownPhysical Attack
2013-06-285:14 PM6/28/20135:15 PMNew Castle DelawareRFCPhysical Attack; VandalismUnknownUnknownPhysical Attack
2013-07-022:20 PM7/5/20133:30 PMAlberta, CanadaWECCLoad Shed 100+MW200UnknownLoad Shed
2013-07-0312:04 PM7/3/201312:48 PMSystem-wide Puerto RicoN/AVoltage Reduction; Line and Generator Trip480393,000Equipment
2013-07-039:34 AM7/3/201310:52 AMSacramento CaliforniaWECCSuspected Physical Attack00Physical Attack
2013-07-0512:05 AM7/5/20131:51 AMCaliforniaWECCPhysical Attack; VandalismUnknown2,500Physical Attack
2013-07-102:30 PM7/10/20132:45 PMBoston, MassachusettsNPCCPhysical Attack; Copper Theft00Physical Attack
2013-07-105:30 PM7/11/20138:00 PMAEP Ohio Power FootprintRFCSevere Weather - ThunderstormsN/A122,314Weather
2013-07-1111:20 PM7/14/20133:22 PMArizonaWECCPhysical Attack; Vandalism455UnknownPhysical Attack
2013-07-1210:00 AM7/12/201310:01 AMWashingtonWECCPhysical Attack; VandalismUnknownUnknownPhysical Attack
2013-07-173:30 PM7/19/20136:45 AMHoltsville, New YorkNPCCFuel Supply Emergency (Natural Gas)417UnknownFuel Supply Deficiency
2013-07-1811:45 PM7/19/201310:05 AMSouthern Orange County CaliforniaWECCEquipment Failure200123,000Equipment
2013-07-183:15 AM7/18/20133:59 AMUtahWECCPhysical Attack; VandalismN/AN/APhysical Attack
2013-07-1811:30 AM7/19/20135:30 PMUpstate New YorkNPCCPublic Appeal - HeatwaveUnknownUnknownWeather
2013-07-1910:30 PM7/21/20138:00 PMNew YorkNPCCSevere Weather - ThunderstormsUnknown74,300Weather
2013-07-196:00 PM7/20/20139:00 AMMichiganRFCSevere Weather - ThunderstormsUnknown156,627Weather
2013-07-227:00 AM7/22/20133:00 PMCaliforniaWECCPhysical Attack; VandalismUnknownUnknownPhysical Attack
2013-07-2311:38 PM7/25/20134:30 AMTulsa, OklahomaSPPSevere Weather - Thunderstorms50092,748Weather
2013-07-251:10 PM7/25/20131:15 PMPolk Substation, Tacoma WashingtonWECCPhysical Attack; VandalismN/AN/APhysical Attack
2013-08-0111:19 PM8/2/201312:49 AMDaytona Beach FloridaFRCCLoss of 300+ MW Load297104,498?
2013-08-016:54 PM8/1/20137:37 PMWestern British ColumbiaWECCElectrical System Separation (Islanding420UnknownIslanding
2013-08-0111:00 AM8/1/20134:00 PMNewburgh, New YorkNPCCPhysical Attack; Copper TheftN/AN/APhysical Attack
2013-08-043:00 AM8/4/20134:00 AMUtahWECCPhysical Attack; VandalismN/AN/APhysical Attack
2013-08-056:35 PM8/5/20136:45 PMVancouver, British ColumbiaWECCElectrical System Separation (Islanding); Severe WeatherUnknownUnknownIslanding
2013-08-064:00 PM8/6/20135:32 PMHolloman Air Force Base, New MexicoWECCPhyscial Attack; VandalismUnknownUnknownPhysical Attack
2013-08-077:30 AM8/7/20139:14 AMGreen Bay, WisconsinMROFuel Supply Emergency (Natural Gas & Fuel Oil)UnknownUnknownFuel Supply Deficiency
2013-08-072:30 PM8/8/20131:00 PMArlington, OregonWECCPhyscial Attack; VandalismUnknownUnknownPhysical Attack
2013-08-0712:15 AM8/7/20139:27 PMEastern Central WisconsinMROSevere Weather - Thunderstorms22051,160Weather
2013-08-1211:55 AM8/12/201311:59 AMPortland, OregonWECCSuspicious ActivityUnknownUnknownPhysical Attack
2013-08-164:58 PM8/17/201311:58 PMHouston Service Area TexasTRESevere Weather - ThunderstormsUnknown219,681Weather
2013-08-197:06 PM8/20/20136:02 AMCentral CaliforniaWECCSevere Weather - Lightning Strike685124,000Weather
2013-08-212:00 PM8/21/20132:01 PMCabot, ArkansasSERCPhyscial Attack; SabotageN/AN/APhysical Attack
2013-08-228:40 AM8/22/201311:49 AMGila River, ArizonaWECCPhyscial Attack; SabotageN/AN/APhysical Attack
2013-08-2212:55 PM8/22/20132:45 PMNew Castle, DelawareRFCPhyscial Attack; VandalismUnknownUnknownPhysical Attack
2013-08-237:30 AM8/23/20137:31 AMNew Castle, DelawareRFCPhyscial Attack; VandalismUnknownN/APhysical Attack
2013-08-268:15 PM8/26/20138:16 PMTacoma WashingtonWECCPhyscial Attack; VandalismUnknownUnknownPhysical Attack
2013-08-289:30 AM8/28/20139:31 AMSweetwater County WyomingWECCPhyscial Attack; VandalismN/AN/APhysical Attack
2013-08-292:57 PM8/29/20133:29 PMAshland, WisconsinMROElectrical System Separation (Islanding); Severe Weather157,000Islanding
2013-08-299:50 AM8/29/20139:50 AMJoplin, MissouriN/APhyscial Attack; VandalismUnknownUnknownPhysical Attack
2013-08-307:30 PM8/31/20131:30 AMEntire ComEd territory IllinoisRFCSevere Weather - ThunderstormsUnknown157,000Weather
2013-09-105:42 PM9/11/201312:02 AMErie, PennsylvaniaRFCLoad Shed of 100+ MW105UnknownLoad Shed
2013-09-114:00 PM9/15/20134:00 PMSoutheastern MichiganRFCSevere Weather - Thunderstorms40075,000Weather
2013-09-2912:00 AM9/29/20131:00 AMCabot ArkansasSERCPhyscial Attack; SabotageUnknownUnknownPhysical Attack
2013-10-067:25 AM10/6/20139:15 AMJacksonville, ArkansasSPPPhysical AttackUnknown9,200Physical Attack
2013-10-112:30 PM10/11/20136:30 PMKeo, ArkansasSERCPhysical AttackUnknownUnknownPhysical Attack
2013-10-1611:15 AM10/16/20136:00 PMRoxboro Plant, North CarolinaSERCCyber Event with Potential to Cause Impact00Cyber Attack
2013-10-192:32 PM10/19/201310:00 PMCaliforniaWECCPhysical AttackUnknownUnknownPhysical Attack
2013-10-215:18 AM10/21/20135:33 AMLocation UnknownWECCElectrical System Separation (Islanding)115433Islanding
2013-10-267:13 AM10/26/20137:14 AMArizonaWECCSuspected Physical AttackUnknownUnknownPhysical Attack
2013-10-274:27 AM10/27/201310:27 PMHouston, TexasTRESevere Weather - HailstormUnknown171,117Weather
2013-11-011:26 PM11/1/20131:27 PMWilmington, DelawareRFCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2013-11-028:25 AM11/2/20138:26 AMSalt Lake City, UtahWECCPhysical Attack - VandalismN/AN/APhysical Attack
2013-11-0212:00 AM11/4/20136:00 AMKing, Whatcom, and Skagit, WashingtonWECCSevere Weather - Heavy WindsUnknown105,000Weather
2013-11-049:04 AM11/4/20139:05 AMConnecicutNPCCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2013-11-0510:10 AM11/7/201310:10 AMIndianaRFCPhysical AttackUnknownUnknownPhysical Attack
2013-11-129:14 AM11/12/201310:30 AMEastern Central New MexicoSPPLoss of Power from Wholesale Provider; Major Distribution DisruptionUnknownUnknownDistribution Interruption
2013-11-122:04 PM11/12/20132:05 PMValle, CaliforniaWECCElectrical System Separation (Islanding)5548,400Islanding
2013-11-163:15 PM11/16/20133:16 PMSalt Lake County, UtahWECCPhysical Attack - VandalismN/AN/APhysical Attack
2013-11-1712:35 PM11/17/20131:40 PMRochelle, IndianaRFCSystem-wide voltage reductions of 3 percent or more387,500?
2013-11-174:45 PM11/21/20134:45 PMEntire Lower Peninsula MichiganRFCSevere Weather - ThunderstormsUnknown50,000Weather
2013-11-174:47 PM11/20/20134:47 PMCentral IndianaRFCSevere Weather - ThunderstormsUnknown61,705Weather
2013-11-174:47 PM11/20/201311:59 AMCentral IndianaRFCSevere Weather - Tornadoes53561,705Weather
2013-11-171:06 PM11/20/20131:06 PMNorth Central IndianaRFCSevere Weather - ThunderstormsUnknown75,065Weather
2013-11-174:19 PM11/18/20136:00 PMIndiana, MichiganRFCSevere Weather - ThunderstormsUnknown77,346Weather
2013-11-172:31 PM11/17/201310:30 PMEntire ComEd Territory IllinoisRFCSevere Weather - ThunderstormsUnknown190,000Weather
2013-11-1712:35 PM11/20/201311:00 AMCentral Missouri, Central IllinoisSERCSevere Weather - TornadoesUnknown200,000Weather
2013-11-177:00 AM11/20/20136:54 PMMichiganRFCSevere Weather - Ice and Snow StormUnknown325,325Weather
2013-11-203:08 AM11/20/20133:09 AMSalt Lake County UtahWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2013-11-217:45 PM11/22/20133:20 AMNorthern CaliforniaWECCSevere Weather - Wind Storm15089,500Weather
2013-11-247:38 AM11/24/20137:39 AMSalt Lake County UtahWECCPhysical Attack - VandalismN/AN/APhysical Attack
2013-12-045:00 AM12/4/20134:17 PMIdaho Falls Area Idaho, Utah-Idaho Border UtahWECCLoad Shed 100+ MW150UnknownLoad Shed
2013-12-068:47 AM12/6/20138:49 AMSaratoga, UtahWECCPhysical Attack - Vandalism, TheftN/AN/APhysical Attack
2013-12-061:51 AM12/11/201312:00 PMGreater Houston, TexasTRESevere Weather - Ice/SnowUnknown881,000Weather
2013-12-096:54 AM12/9/20132:22 PMVirginia Service TerritorySERCSevere Weather - Ice/Snow29388,000Weather
2013-12-101:01 AM12/11/20131:01 AMArizonaWECCSuspected Physical AttackUnknownUnknownPhysical Attack
2013-12-1311:00 AM12/27/201311:00 AMTexasTREFuel Supply Emergencies (Coal)UnknownUnknownFuel Supply Deficiency
2013-12-1311:00 AM12/27/201311:00 AMTexasTEFuel Supply Emergencies (Coal)UnknownUnknownFuel Supply Deficiency
2013-12-223:28 AM12/28/201311:45 PMSouthern Lower Penninsula, MichiganRFCSevere Weather - Ice/SnowUnknown50,000Weather
2013-12-226:16 AM12/24/201311:59 PMFrontier/Genesee/Northern New YorkNPCCSevere Weather - Ice/SnowUnknown59,000Weather
2013-12-226:30 AM12/25/20135:12 AMMichiganRFCSevere Weather - Ice/Snow350140,735Weather
2013-12-233:20 PM12/25/201311:32 AMCentral Maine MaineNPCCSevere Weather - Ice/SnowUnknown52,500Weather
2013-12-279:43 AM12/27/201312:43 PMGilabend ArizonaWECCPhysical AttackN/AN/APhysical Attack
2013-12-3011:00 AM12/30/201311:01 AMSalt Lake County UtahWECCPhysical AttackN/AN/APhysical Attack
2013-12-3011:00 AM1/1/20148:00 AMNorth of Roosevelt lake ArizonaWECCPhysical AttackN/AN/APhysical Attack
2014-01-062:37 PM1/6/20142:38 PMUtahRFCVandalismN/AN/APhysical Attack
2014-01-067:01 AM1/7/20149:00 AMTexasTREPublic Appeal due to Severe Weather - ColdN/AN/APublic Appeal
2014-01-068:45 PM1/7/20149:00 PMUnknownRFCPublic Appeal due to Severe Weather - ColdUnknownUnknownPublic Appeal
2014-01-0610:00 PM1/6/201410:01 PMKentuckyRFCPublic Appeal due to Severe Weather - ColdUnknownUnknownPublic Appeal
2014-01-067:50 PM1/6/20148:49 PMPennsylvaniaRFCVoltage Reduction due to Severe Weather - Cold20062,000Weather
2014-01-067:50 PM1/6/20148:44 PMDistrict of ColumbiaRFCVoltage Reduction due to Severe Weather - ColdUnknownUnknownWeather
2014-01-067:50 PM1/6/20148:44 PMUnknownRFCVoltage Reduction due to Severe Weather - ColdUnknownUnknownWeather
2014-01-067:50 PM1/6/20148:44 PMPennsylvaniaRFCVoltage Reduction due to Severe Weather - ColdUnknownUnknownWeather
2014-01-067:52 PM1/6/20148:45 PMDelawareRFCVoltage Reduction due to Severe Weather - ColdUnknownUnknownWeather
2014-01-0710:59 AM1/9/20149:00 AMIllinoisRFCFuel Supply Emergency - Natural GasN/AN/AFuel Supply Deficiency
2014-01-079:30 AM1/8/20149:30 AMPiedmont North Carolina, Piedmont South CarolinaSERCFuel Supply Emergency due to Severe Weather - ColdUnknownUnknownFuel Supply Deficiency
2014-01-076:00 PM1/7/201411:00 PMSouth CarolinaSERCVoltage Reduction; Public Appeal; Load Shed 100+MW due to Severe Weather - Cold4,853677,858Weather
2014-01-076:00 AM1/7/20148:30 AMNortheast TennesseeSERCPublic Appeal due to Severe Weather - ColdUnknownUnknownWeather
2014-01-076:00 AM1/7/20148:30 AMTennesseeSERCPublic Appeal due to Severe Weather - ColdUnknownUnknownWeather
2014-01-076:18 AM1/7/20146:19 AMPennsylvaniaRFCSevere Weather - ColdUnknownUnknownWeather
2014-01-077:58 AM1/7/201411:00 AMNorth CarolinaSERCVoltage Reduction; Public Appeal due to Severe Weather - Cold14,435UnknownWeather
2014-01-074:15 PM1/8/20141:20 PMNorth CarolinaSERCPublic Appeal due to Severe Weather - ColdUnknownUnknownWeather
2014-01-079:00 PM1/8/20149:00 AMUnknownRFCPublic Appeal due to Severe Weather - ColdUnknownUnknownWeather
2014-01-086:00 AM1/8/20149:00 AMSouth CarolinaSERCVoltage Reduction; Public Appeal; Load Shed 100+MW due to Severe Weather - Cold4,545677,858Weather
2014-01-085:00 AM1/8/20146:30 AMUnknownRFCVoltage Reduction due to Severe Weather - Cold576UnknownWeather
2014-01-134:44 PM1/13/20144:45 PMArizonaWECCPhysical Attack - VandalismN/AN/APhysical Attack
2014-01-152:32 PM1/15/20142:45 PMUtahWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-01-1612:30 PM1/16/20141:57 PMArizonaWECCPhysical Attack - VandalismN/AN/APhysical Attack
2014-01-1710:30 AM1/28/20149:00 AMIllinoisRFCFuel Supply Emergency - Natural GasUnknownUnknownFuel Supply Deficiency
2014-01-1712:20 PM1/17/201412:20 PMOhioRFCSuspected Physical AttackUnknownUnknownPhysical Attack
2014-01-185:39 PMUnknownUnknownUnknownRFCElectrical System IslandingUnknownUnknownIslanding
2014-01-189:00 AM1/18/20149:45 AMTexasTREPublic Appeal to Reduce Electricity UsageUnknownUnknownPublic Appeal
2014-01-2112:14 PM1/21/201412:39 PMMissouriSERCPhysical Attack - Vandalism10UnknownPhysical Attack
2014-01-215:00 PMUnknownUnknownNew JerseyRFCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-01-2212:30 AM1/22/20142:45 AMWisconsinMROPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-01-229:45 AM1/22/20148:19 PMOhioRFCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-01-221:55 PM1/22/20142:55 PMWisconsinMROPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-01-229:15 PM1/23/20143:08 AMBurlington County, New JerseyRFCSuspected Physical AttackUnknownUnknownPhysical Attack
2014-01-239:17 PM1/24/20145:00 PMWynoochee, WashingtonWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-01-234:00 AM1/24/201412:00 PMTennesseeSERCPublic Appeal due to Severe Weather - ColdUnknownUnknownWeather
2014-01-231:04 PM1/24/20149:00 AMMarylandRFCPublic Appeal due to Severe Weather - ColdUnknownUnknownWeather
2014-01-234:00 PM1/24/201412:00 PMTennesseeSERCPublic Appeal due to Severe Weather - ColdUnknownUnknownWeather
2014-01-2412:00 AM4/9/201411:53 AMWisconsinRFCFuel Supply Emergency - CoalUnknownUnknownFuel Supply Deficiency
2014-01-243:30 PM1/24/20145:00 PMWisconsinMROPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-01-2510:00 AM1/25/201411:00 AMMadison, WisconsinMROPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-01-269:00 PM1/27/201411:00 AMOregonWECCPhysical Attack - VandalismN/AN/APhysical Attack
2014-01-2611:00 PMUnknownUnknownNew JerseyRFCPhysical AttackUnknownUnknownPhysical Attack
2014-01-272:20 PM1/28/20149:00 PMMarylandRFCPublic Appeal due to Severe Weather - ColdUnknownUnknownWeather
2014-01-294:00 PM1/29/20144:44 PMUnknownMROPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-01-303:00 PMUnknownUnknownArizonaWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-02-057:00 AM2/23/20147:00 AMNew YorkNPCCFuel Supply Emergency - Coal300UnknownFuel Supply Deficiency
2014-02-057:35 AM2/7/20144:03 AMLancaster Region, PennsylvaniaRFCSevere Weather - Snow/IceUnknown62,159Weather
2014-02-0512:00 AM2/9/20146:00 PMMaryland, West VirginiaRFCSevere Weather - Snow/IceUnknown101,580Weather
2014-02-051:00 AM2/9/20148:40 PMPennsylvaniaRFCSevere Weather - Snow/IceUnknown144,000Weather
2014-02-058:05 AM2/5/20148:06 AMBaltimore, MarylandRFCSevere Weather - Ice800181,000Weather
2014-02-055:00 AM2/5/20145:01 AMPennsylvaniaRFCSevere Weather - Snow/IceUnknown715,000Weather
2014-02-061:00 PM2/6/201410:00 PMCaliforniaWECCFuel Supply Emergency - Natural Gas4,000UnknownFuel Supply Deficiency
2014-02-061:05 PM2/6/20147:15 PMNorthern CaliforniaWECCFuel Supply Emergency - Natural Gas160UnknownFuel Supply Deficiency
2014-02-062:15 PM2/6/20147:39 PMCaliforniaWECCFuel Supply Emergency - Natural Gas611UnknownFuel Supply Deficiency
2014-02-061:58 PM2/6/20148:40 PMRio Grande Valley TexasTREPublic Appeal to Reduce Electricity UsageUnknownUnknownPublic Appeal
2014-02-063:35 PM2/7/201411:30 AMERCOT Region TexasTREPublic Appeal to Reduce Electricity UsageUnknownUnknownPublic Appeal
2014-02-077:00 AM3/21/20148:00 AMNiagara County New YorkNPCCFuel Supply Emergency - Coal675UnknownFuel Supply Deficiency
2014-02-074:30 PM2/8/20149:00 AMERCOT Region TexasTREPublic Appeal to Reduce Electricity UsageUnknownUnknownPublic Appeal
2014-02-074:50 PM2/7/20148:30 PMTexasTREPublic Appeal to Reduce Electricity UsageUnknownUnknownPublic Appeal
2014-02-122:15 PM2/12/20142:16 PMVermontNPCCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-02-1211:03 AM2/15/20148:40 AMSouth CarolinaSERCSevere Weather - Snow/Ice700120,124Weather
2014-02-1212:10 PM2/15/20143:20 PMNorth CarolinaSERCSevere Weather - Snow/IceUnknown200,000Weather
2014-02-127:48 AM2/15/20144:30 AMNorthern/Northeastern GeorgiaSERCSevere Weather - Snow/Ice1,246373,835Weather
2014-02-141:00 PM2/14/20143:00 PMPortland, OregonWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-02-186:43 PM2/18/20146:44 PMBend, OregonWECCPhysical Attack - VandalismN/AN/APhysical Attack
2014-02-204:40 PM2/21/201411:59 PMMissouri, IllinoisSERCSevere Weather - Snow/IceUnknown66,000Weather
2014-02-212:53 AM2/21/20149:00 PMNorthern/Northeastern GeorgiaSERCSevere Weather - Thunderstorms/High Winds22166,445Weather
2014-03-027:00 PM3/4/20149:00 AMERCOT Region TexasTREPublic Appeal due to Severe Weather - ColdN/AN/AIslanding
2014-03-031:48 AM3/3/20141:49 AMMid-Columbia River Generation, WashingtonWECCFuel Supply Emergency - Hydro630UnknownFuel Supply Deficiency
2014-03-035:25 PM3/3/20145:25 PMNew YorkNPCCSuspected Physical AttackUnknownUnknownPhysical Attack
2014-03-036:40 AM3/3/20143:28 PMTennesseeSERCSevere Weather - Winter StormUnknown65,904Weather
2014-03-049:06 AM3/17/20149:06 AMWeston, WisconsinMROFuel Supply Emergency - CoalUnknownUnknownFuel Supply Deficiency
2014-03-055:06 PM3/5/20145:07 PMSalt Lake City, UtahWECCPhysical AttackUnknownUnknownphysical Attack
2014-03-073:30 AM3/7/20149:00 PMTriad, North CarolinaSERCSevere Weather - Winter Storm1500370,900Weather
2014-03-1112:00 AM3/13/201412:00 AMBoone County, IowaMROSuspected Physical AttackUnknownUnknownPhysical Attack
2014-03-127:35 PM3/13/201412:00 PMNorth CarolinaSERCSevere Weather - High Winds25061,377Weather
2014-03-1412:34 PM3/14/20144:45 PMBoone County, IowaMROPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-03-175:25 PM3/18/201412:56 AMGlendale, ArizonaWECCPhysical Attack - SabatogeN/AN/APhysical Attack
2014-03-2012:00 AM3/20/201412:01 AMNew YorkNPCCSuspected Cyber AttackUnknownUnknownCyber Attack
2014-03-2411:07 AM3/24/201411:08 AMSalt Lake City, UtahWECCPhysical Attack - VandalismN/AN/APhysical Attack
2014-03-261:37 PM3/26/20142:33 PMMontanaWECCElectrical System Separation (Islanding)UnknownUnknownIslanding
2014-03-264:00 PM4/10/201412:00 PMIowaMROPhysical AttackN/AN/APhysical Attack
2014-03-313:41 PM3/31/20148:08 PMPuerto RicoN/ASystem Wide Voltage ReductionUnknownUnknown?
2014-04-0312:00 AMUnknownUnknownTexasTREFuel Supply Emergency - CoalUnknownUnknownFuel Supply Deficiency
2014-04-032:45 PM4/9/201411:53 AMWisconsinMROFuel Supply Emergency - CoalUnknownUnknownFuel Supply Deficiency
2014-04-043:30 AM4/4/20148:15 AMCentral ArkansasSERCSevere Weather - WindUnknown57,200Weather
2014-04-0811:09 AM4/8/201411:20 AMPuerto RicoN/AVoltage ReductionUnknownUnknown?
2014-04-081:00 PM4/8/20141:01 PMDavis, CaliforniaWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-04-126:15 PM4/14/20149:00 AMWestern and Central MichiganRFCSevere Weather - ThunderstormsUnknown50,000Weather
2014-04-128:00 PM4/15/20147:30 PMMichiganRFCSevere WeatherUnknown164,000Weather
2014-04-237:45 PM4/23/20148:37 PMBaton Rouge, LouisianaSERCLoad shedding of 100 Megawatts16328,000Load Shed
2014-04-243:02 PM4/24/20145:13 PMAlberta, CanadaWECCElectrical System Separation (Islanding)UnknownUnknownIslanding
2014-04-257:00 AM4/25/20147:30 AMDelawareRFCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-04-279:15 AMUnknownUnknownAlberta, CanadaWECCElectrical System Separation (Islanding)97504,000,000Islanding
2014-04-2712:07 PM4/27/201412:09 PMAlbany, OregonWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-04-299:37 AM5/1/20149:00 AMNortheastern Mississippi, Northern AlabamaSERCSevere Weather - ThunderstormsUnknown57,000Weather
2014-04-2911:30 PM4/29/201412:30 PMMississippi, AlabamaSERCSevere Weather - Thunderstorms355106,648Weather
2014-04-303:50 AM4/30/20142:00 PMAlabama, Florida, GeorgiaSERCSevere Weather - Thunderstorms29689,000Weather
2014-05-081:00 AM5/8/20141:01 AMMississippiSERCPhysical AttackUnknownUnknownPhysical Attack
2014-05-088:39 AM5/8/20148:40 AMImperial Valley, CaliforniaWECCPhysical AttackUnknownUnknownPhysical Attack
2014-05-096:00 PM5/11/20141:00 PMIndianaRFCSevere Weather - Heavy WindsUnknown56,000Weather
2014-05-116:38 PM5/11/20146:39 PMMISO North, MinnesotaMROPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-05-121:14 PM5/12/20141:15 PMLayton, UtahWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-05-143:34 PMUnknownUnknownSan Diego & Orange Counties, CaliforniaWECCPublic Appeal to Reduce Electricity Usage - Wild FiresN/A426Wildfire
2014-05-1512:10 PM5/15/201412:13 PMWhiting, IndianaRFCSuspected Physical AttackN/AN/APhysical Attack
2014-05-1510:43 AMUnknownUnknownSan Diego & Orange Counties, CaliforniaWECCPublic Appeal to Reduce Electricity Usage - Wild Fires3,3001,400,000Wildfire
2014-05-1610:43 AM5/16/20149:00 PMSan Diego & Orange Counties, CaliforniaWECCPublic Appeal to Reduce Electricity Usage - Wild Fires3,9001,400,000Wildfire
2014-05-207:01 AM5/20/20147:02 AMDuchesne County, UtahWECCPhysical Attack - VandalismN/AN/APhysical Attack
2014-05-233:00 PM5/25/20147:00 PMNorth CarolinaSERCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-05-2612:31 PM5/26/20141:18 PMBritish Columbia & Alberta, CanadaWECCElectrical System Separation (Islanding)UnknownUnknownIslanding
2014-05-2711:00 AM5/27/20144:53 PMPhoenix, ArizonaWECCPhysical Attack - VandalismN/AN/APhysical Attack
2014-06-033:32 PM6/3/20143:59 PMAlberta, CanadaWECCElectrical System Islanding338N/AIslanding
2014-06-031:38 AM6/3/20141:43 AMTexasERCOTPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-06-053:00 AM6/7/201411:45 PMShelby County, TennesseeSERCSevere Weather - Thunderstorms49438,500Weather
2014-06-051:06 PM6/5/20141:07 PMWest TennesseeSERCSevere Weather - ThunderstormsUnknown56,475Weather
2014-06-061:00 PMUnknownUnknownTexasERCOTFuel Supply Emergency - CoalUnknownUnknownFuel Supply Deficiency
2014-06-0711:00 PM6/8/20145:30 AMNorth and Central , AlabamaSERCSevere Weather - Thunderstorms21765,000Weather
2014-06-0911:07 AM6/9/201411:30 AMAlberta, CanadaWECCElectrical System IslandingUnknownUnknownIslanding
2014-06-109:50 PM6/11/20142:30 PMWest VirginiaRFCSevere Weather - ThunderstormsUnknown66,383Weather
2014-06-119:30 AM6/11/20149:31 AMNogales, ArizonaWECCSuspected Physical AttackN/AN/APhysical Attack
2014-06-114:00 PM6/11/20144:30 PMSouthern MississippiSERCPhysical Attack - VandalismN/AN/APhysical Attack
2014-06-129:10 AM6/12/20149:11 AMSomervell County, TexasERCOTSuspected Physical AttackUnknownUnknownphysical Attack
2014-06-1512:00 AM6/15/20141:00 AMCentral MinnesotaMROSevere Weather - ThunderstormsUnknown55,951Weather
2014-06-189:52 AM6/18/20147:00 PMWashingtonWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-06-185:00 PM6/20/20143:00 PMSoutheast MichiganRFCSevere Weather - ThunderstormsUnknown138,802Weather
2014-06-198:47 AM6/19/20148:48 AMNashville, TennesseeSERCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-06-242:54 PM6/24/20142:55 PMNashville, TennesseeSERCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-06-271:21 PMUnknownUnknownWisconsinMROFuel Supply Emergency - CoalUnknownUnknownFuel Supply Deficiency
2014-06-305:55 PM7/1/20142:53 AMSoutheast WisconsinMROSevere Weather - Thunderstorms424120,000Weather
2014-06-3011:20 PM7/1/20145:00 PMNorth Central IndianaRFCSevere Weather - ThunderstormsUnknown127,000Weather
2014-06-308:00 PM7/2/20146:30 PMIllinoisRFCSevere Weather - ThunderstormsUnknown420,000Weather
2014-07-013:30 AMUnknownUnknownSouthwest MichiganRFCSevere Weather - ThunderstormsUnknown51,000Weather
2014-07-015:00 AM7/2/20142:00 AMIndiana, MichiganRFCSevere Weather - ThunderstormsUnknown57,237Weather
2014-07-014:00 AM7/3/201411:30 PMSoutheast MichiganRFCSevere Weather - ThunderstormsUnknown140,000Weather
2014-07-028:39 AM7/28/20143:13 PMWisconsinMROFuel Supply Emergency - CoalUnknownUnknownFuel Supply Deficiency
2014-07-0310:55 PM7/4/20141:50 AMVermont, New Hampshire, Maine, Rhode Island, Massachusetts, ConnecticutNPCCSevere Weather - ThunderstormsUnknown64,000Weather
2014-07-036:00 PM7/6/201412:00 PMPennsylvaniaRFCSevere Weather - ThunderstormsUnknown298,165Weather
2014-07-089:31 PMUnknownUnknownMarylandRFCSevere Weather - ThunderstormsUnknown56,600Weather
2014-07-087:21 PM7/11/20147:00 AMUpstate New YorkNPCCSevere Weather - ThunderstormsUnknown65,000Weather
2014-07-085:30 PM7/10/20143:00 PMCentral and Northeastern PennsylvaniaRFCSevere Weather - ThunderstormsUnknown66,000Weather
2014-07-086:00 PM7/11/20145:53 PMEastern PennsylvaniaRFCSevere Weather - ThunderstormsUnknown69,000Weather
2014-07-085:30 PM7/12/201411:30 PMWest VirginiaRFCSevere Weather - ThunderstormsUnknown71,000Weather
2014-07-085:30 PM7/12/201411:20 PMMaryland, West VirginiaRFCSevere Weather - ThunderstormsUnknown96,000Weather
2014-07-088:30 PM7/11/201411:00 PMPennsylvaniaRFCSevere Weather - ThunderstormsUnknown260,000Weather
2014-07-144:00 PM7/14/20144:15 PMWashingtonWECCSuspected Physical AttackUnknownUnknownPhysical Attack
2014-07-237:14 PM7/24/201412:23 AMArkansas, LouisianaSERCSevere Weather - ThunderstormsUnknown57,299Weather
2014-07-244:29 PM7/24/201411:32 PMCaliforniaWECCLoad shedding of 100 Megawatts12626,856Load Shed
2014-07-2711:00 PM7/28/20144:00 AMCentral CaliforniaWECCUncontrolled Loss of 300 Megawatts4801?
2014-07-275:00 PM7/28/201411:00 PMSoutheast MichiganRFCSevere Weather - ThunderstormsUnknown156,611Weather
2014-08-013:03 PM8/1/20143:04 PMUtahWECCPhysical AttackUnknownUnknownPhysical Attack
2014-08-136:08 AM8/13/20146:34 AMAlberta, CanadaWECCElectrical System Separation (Islanding)370UnknownIslanding
2014-08-201:21 AM8/20/20141:41 AMAlberta, CanadaWECCElectrical System Separation (Islanding)UnknownUnknownIslanding
2014-08-234:39 PM8/24/20141:46 AMCity of Highland, IllinoisRFCOperational Failure of Electrical System316,549Operations
2014-08-243:20 AM8/25/20147:05 AMNorth of San Francisco, CaliforniaWECCEarthquake9570,000Natural Disaster
2014-08-263:30 PMUnknownUnknownSoutheast MichiganRFCSevere Weather - ThunderstormsUnknownUnknownWeather
2014-08-2712:49 PM8/27/20141:30 PMDelawareRFCSuspected Physical AttackUnknownUnknownPhysical Attack
2014-08-303:30 PM9/1/20142:30 PMLuzerne County, PennsylvaniaRFCSuspected Physical AttackUnknownUnknownPhysical Attack
2014-09-057:14 PM9/6/20141:00 PMLower Peninsula of MichiganRFCSevere Weather - Thunderstorms5060,000Weather
2014-09-054:30 PM9/6/20142:00 PMIllinoisRFCSevere Weather - ThunderstormsUnknown180,400Weather
2014-09-058:00 PMUnknownUnknownMichiganRFCSevere Weather - ThunderstormsUnknown324,000Weather
2014-09-098:18 AM9/9/201411:59 PMAlberta, CanadaWECCElectrical System Separation (Islanding)UnknownUnknownIslanding
2014-09-114:56 AM9/11/20145:37 AMAlberta, CanadaWECCElectrical System Separation (Islanding)UnknownUnknownIslanding
2014-09-149:50 PM9/17/20143:08 PMOregonWECCElectrical System Separation (Islanding)1123Islanding
2014-09-1611:56 AM9/16/201411:57 AMCaliforniaWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-09-171:30 PM9/17/20142:00 PMMichiganRFCSuspected Physical Attack - Suspcious ActivityUnknownUnknownPhysical Attack
2014-09-192:20 PM9/23/20141:10 PMEstacada, OregonWECCElectrical System Separation (Islanding)1123Islanding
2014-09-211:30 PMUnknownUnknownNew YorkNPCCPhysical Attack - Suspcious ActivityUnknownUnknownPhysical Attack
2014-09-2211:00 AM9/22/201411:01 AMNortheast MinnesotaMROFuel Supply Emergency - Coal1,000140,000Fuel Supply Deficiency
2014-09-231:13 AM9/23/20143:00 AMNew YorkNPCCPhysical Attack - Suspcious ActivityN/AN/APhysical Attack
2014-09-2411:30 AM9/24/20143:43 PMWashingtonWECCPhysical Attack - VandalismUnknownUnknownPhysical Attack
2014-10-023:00 PM10/2/20143:01 PMCave Junction, OregonWECCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-10-0210:15 PMUnknownUnknownArkansasSERCSevere Weather - ThunderstormsUnknown67,300Weather
2014-10-024:00 PM10/7/201410:00 AMTexasTRESevere Weather - ThunderstormsUnknown500,000Weather
2014-10-0610:52 AM10/7/201412:52 AMHouston, TexasTRESevere Weather - Thunderstorms292129,237Weather
2014-10-0712:00 PM10/7/201412:01 PMMarylandRFCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-10-084:49 PM10/8/20146:23 PMRio Grande Valley TexasTREPublic Appeal to Reduce Electricity Usage; Load Shed of 100 MW585120,000Public Appeal
2014-10-084:47 PM10/8/20146:29 PMRio Grande Valley TexasTREPublic Appeal to Reduce Electricity Usage; Load Shed of 100 MWUnknownUnknownPublic Appeal
2014-10-099:27 AMUnknownUnknownRio Grande Valley TexasTREPublic Appeal to Reduce Electricity UsageUnknown2,800Public Appeal
2014-10-1312:45 PM10/13/20144:15 PMLouisianaSERCSevere Weather - ThunderstormsUnknown68,600Weather
2014-10-146:20 PM10/14/20146:28 PMPuerto RicoN/AVoltage ReductionUnknownUnknown?
2014-10-147:33 AM10/14/20147:34 AMOregonWECCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-10-145:44 AM10/14/20145:50 PMAlabama, Florida, GeorgiaSERCSevere Weather - Thunderstorms19157,475Weather
2014-10-157:46 AM10/15/20147:47 AMOregonWECCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-10-169:12 AM10/17/20143:00 PMGarden City, KansasMROSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-10-161:25 PM10/16/20145:26 PMManitobaMROSuspected Physical Attack129UnknownPhysical Attack
2014-10-2012:00 AMUnknownUnknownHoward County, TexasMROSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-10-218:25 AM10/21/201410:08 AMCarmel, IndianaMROSuspected Cyber AttackUnknownUnknownCyber Attack
2014-10-2210:46 PM10/22/201410:47 PMNew Hampshire, Maine, Massachusetts, Rhode Island, Connecticut, VermontNPCCSevere WeatherUnknown66,650Weather
2014-10-244:00 PM10/24/20145:50 PMHoward County, TexasMROSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-10-246:16 PM10/25/20141:51 PMEnfield, Connecticut NPCCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-10-254:00 PM10/25/201410:00 PMGreater Portland and Salem, OregonWECCSevere Weather - Wind21678,000Weather
2014-10-256:00 PMUnknownUnknownKing County, Thurston County and Kitsap County, WashingtonWECCSevere Weather - Wind15496,000Weather
2014-11-011:00 AM11/1/20141:01 AMPortland, OregonWECCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-11-021:46 PMUnknownUnknownMassachusetts, Maine, Vermont, New Hampshire, Rhode Island, ConnecticutNPCCSevere Weather - Winter StormUnknown63,719Weather
2014-11-116:00 PM11/14/20143:00 PMWashingtonWECCSevere Weather - Wind13268,000Weather
2014-11-122:59 AM11/12/20143:00 AMUnknownSERCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-11-137:07 AM11/13/20147:08 AMHoward County,TexasMROSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-11-149:50 AM11/14/20141:18 PMEstacada, OregonWECCElectrical System Islanding1123Islanding
2014-11-192:44 PM11/19/20142:45 PMVictorville, CaliforniaWECCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-11-2111:26 AM11/23/20145:20 PMSand Springs - Fort Rock, OregonWECCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-11-218:29 PM11/23/201412:16 AMTwin Falls, IdahoWECCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-11-2412:00 AMUnknownUnknownNebraska, Kansas, Texas, Arkansas, Louisiana, New MexicoSPPFuel Supply Emergency - CoalUnknownUnknownFuel Supply Deficiency
2014-11-2412:00 PM11/27/20141:00 PMMichiganRFCSevere Weather - WindUnknown186,154Weather
2014-11-265:50 PM11/28/20147:00 AMNew Hampshire, Massachusetts, Maine, Rhode Island, Connecticut, VermontNPCCSevere Weather - Winter StormUnknown79,530Weather
2014-12-0110:44 AM12/1/201410:45 AMFayetteville, North CarolinaSERCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-12-0312:15 PM12/3/201412:16 PMMaineNPCCSuspected Physical Attack - VandalismUnknownUnknownPhysical Attack
2014-12-117:21 AM12/11/20149:53 PMSan Francisco, CaliforniaWECCDistribution Interruption - Unknown Cause22575,000Distribution Interruption
2014-12-114:05 PM12/11/20149:00 PMPortland, OregonWECCSevere Weather- High Winds25085,470Weather
2014-12-115:00 PM12/12/201410:00 AMKitsap, Thurston, Whatcom counties WashingtonWECCSevere Weather- High Winds116264,000Weather
2014-12-116:40 AMUnknownUnknownNorthern CaliforniaWECCSevere Weather- High WindsUnknownUnknownWeather
2014-12-1111:15 PMUnknownUnknownNorthern CaliforniaWECCSevere Weather- High WindsUnknownUnknownWeather
2014-12-1711:00 AM12/17/201412:15 PMWashingtonWECCSuspected Physical AttackUnknownUnknownPhysical Attack
2014-12-303:50 PM12/31/201411:00 AMNew Hampshire, Massachusetts, Maine, Rhode Island, Connecticut, VermontNPCCSuspected Cyber AttackUnknownUnknownCyber Attack
2014-12-301:08 PM1/1/20154:50 PMNorthern CaliforniaWECCSevere Weather- High Winds12784,500Weather
January2015-01-075:00 PM1/8/20158:35 AMTennesseeSERCPublic appeal to reduce the use of electricitySevere Weather - WinterUnknownUnknownWeather
January2015-01-075:00 PM1/8/20158:35 AMTennessee, Kentucky, Virginia, North Carolina, Georgia, Alabama, MissouriSERCPublic appeal to reduce the use of electricitySevere Weather - WinterUnknownUnknownWeather
January2015-01-224:24 AM1/22/20155:55 AMPortland, OregonWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
January2015-01-262:39 PM1/26/20152:40 PMCave Junction, OregonWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
January2015-01-2710:30 AM1/27/201510:31 AMKountze, TexasSERCSuspected Physical AttackSabotage00Physical Attack
February2015-02-0111:24 AM2/1/201511:44 AMWeber County, UtahWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
February2015-02-029:40 AM2/2/20159:41 AMConroe, TexasTRESuspected Physical AttackSabotageUnknownUnknownPhysical Attack
February2015-02-0411:55 AM2/4/201511:56 AMVollmers, CaliforniaWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
February2015-02-058:15 AM2/5/20158:17 AMCameron, ArizonaWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
February2015-02-0511:20 AM2/5/201511:21 AMDunismuir, CaliforniaWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
February2015-02-068:58 PMUnknownUnknownNorthern CaliforniaWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather - WindUnknown65,000Weather
February2015-02-0911:30 AM2/9/20151:15 PMColorado Springs, ColoradoWECCSuspected Physical AttackSabotageUnknownUnknownPhysical Attack
February2015-02-169:00 PM2/18/20152:00 PMTennessee, Kentucky, Virginia, North Carolina, Georgia, Alabama, MissouriSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather - WinterUnknown67,189Weather
February2015-02-169:41 PM2/18/20157:00 AMNorthern/North Eastern, GeorgiaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather - Winter620186,035Weather
February2015-02-176:20 AM2/17/20157:30 AMPrescott Valley, ArizonaWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
February2015-02-179:00 AM2/18/201511:00 PMNorth Carolina, South CarolinaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather - WinterUnknown52,000Weather
February2015-02-172:12 AM2/18/20154:00 PMNorth Carolina, South CarolinaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather - WinterUnknown68,000Weather
February2015-02-183:00 PM2/20/20159:00 AMTennessee, Kentucky, Virginia, North Carolina, Georgia, Alabama, MissouriSERCPublic appeal to reduce the use of electricitySevere Weather - WinterUnknownUnknownWeather
February2015-02-192:30 PM2/19/20153:20 PMWinslow, ArizonaWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
February2015-02-206:00 AM2/20/201510:00 AMNorth Carolina, South CarolinaSERCSystem-wide voltage reductions of 3 percent or moreSevere Weather - WinterUnknownUnknownWeather
February2015-02-218:34 AM2/21/201512:45 PMFentress County, TennesseeSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather - WinterUnknown50,000Weather
February2015-02-263:30 AM2/27/201512:00 PMNorth CarolinaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather - Winter400103,776Weather
February2015-02-263:12 AM2/26/20158:00 PMNorth Carolina, South CarolinaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather - WinterUnknown124,000Weather
March2015-03-049:05 AM3/4/20152:15 PMJohnson City , TennesseeSERCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
March2015-03-0911:50 PM3/10/201510:53 AMWashingtonWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
March2015-03-153:30 PM3/15/20157:00 PMGreater Portland & Salem , OregonWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather - Wind21071,000Weather
March2015-03-167:31 AM3/16/201510:06 AMWinona , MinnesotaMROSuspected Physical AttackSabotage205,941Physical Attack
March2015-03-196:30 PM3/19/20159:37 PMSouthwest KansasSPPSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
March2015-03-224:25 PM3/22/20154:26 PMWest VirginiaRFCSuspected Physical AttackVandalism240Physical Attack
March2015-03-263:21 PM3/26/20154:59 PMContra Costa County, CaliforniaWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSystem Operations15UnknownIslanding
March2015-03-294:26 AM3/29/20159:21 AMCaliforniaWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
April2015-04-016:25 PM4/1/20156:26 PMSan Juan County, UtahWECCSuspected Physical AttackVandalismUnknown37Physical Attack
April2015-04-027:04 AM4/2/20158:57 AMSan Juan County, UtahWECCSuspected Physical AttackVandalism65,763Physical Attack
April2015-04-032:00 AM4/3/20157:48 AMHarvey, Reno, and Sedgwick Counties, KansasSPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather - ThunderstormsUnknown70,000Weather
April2015-04-068:12 AM4/6/201512:08 PMButte County, CaliforniaWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSystem OperationsUnknown80,000Operations
April2015-04-073:34 PM4/7/20153:46 PMCaliforniaWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSystem Operations00Islanding
April2015-04-0712:30 PM4/7/20155:34 PMUnknownRFCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSystem OperationsUnknownUnknownOperations
April2015-04-179:16 AM4/17/201511:00 AMCanadaWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSystem Operations9,300UnknownIslanding
April2015-04-179:30 PM4/19/201511:50 PMHouston, TexasTRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown280,982Weather
April2015-04-189:00 PM4/21/20154:00 AMDallas, Fort Worth, TexasTRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown89,000Weather
April2015-04-247:10 PM4/26/20154:00 PMDallas, Fort Worth, TexasTRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown57,000Weather
April2015-04-2710:30 AM4/28/20156:45 PMLouisiana and TexasSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown199,000Weather
May2015-05-0210:51 PM5/3/201512:26 AMFranklin County, TennesseeSERCSuspected Physical AttackVandalism1215Physical Attack
May2015-05-043:25 PM5/4/20153:26 PMSalt Lake County, UtahWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
May2015-05-118:32 AM5/11/20158:33 AMShasta County, CaliforniaWECCSuspected Physical AttackSabotage00Physical Attack
May2015-05-1212:40 AM5/12/201512:45 AMCoahoma County, MississippiSERCSuspected Physical AttackSabotage00Physical Attack
May2015-05-183:28 PM5/18/20153:47 PMWashingtonWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSevere Weather2750Weather
May2015-05-258:30 PMUnknownUnknownTexas, Louisiana, ArkansasSPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown57,351Weather
May2015-05-258:30 PM5/26/20156:30 PMTexasSPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown57,531Weather
May2015-05-2510:45 PM5/28/20151:25 AMFort Bend County, & Harris County ,TexasTRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown61,000Weather
May2015-05-256:00 PM5/29/20157:15 AMNorth TexasTRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown454,000Weather
May2015-05-265:30 AM5/27/20157:00 PMTexas, Louisiana, Arkansas, MississippiSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown78,515Weather
June2015-06-017:19 PM6/2/20158:36 AMCaliforniaWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSystem Operations5484Islanding
June2015-06-0112:27 AM6/1/20152:15 AMDaviess County, KentuckySERCSuspected Physical AttackVandalism2110Physical Attack
June2015-06-026:58 PM6/2/20157:24 PMCaliforniaWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSystem Operations5727Islanding
June2015-06-033:00 PM6/5/20155:00 PMTexasTREPublic appeal to reduce the use of electricitySystem OperationsUnknownUnknownPublic Appeal
June2015-06-071:52 PM6/7/20152:13 PMTennesseeSERCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSystem OperationsUnknownUnknownOperations
June2015-06-071:54 PM6/7/20152:13 PMShelby County, TennesseeSERCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incident

System-wide voltage reductions of 3 percent or more
System Operations926UnknownOperations
June2015-06-0812:00 AMUnknownUnknownMerced County, CaliforniaWECCFuel supply emergencies that could impact electric power system adequacy or reliabilitySystem Operations176UnknownFuel Supply Deficiency
June2015-06-201:52 PM6/20/20153:30 PMSolano County, CaliforniaWECCSuspected Physical AttackVandalismUnknown0Physical Attack
June2015-06-236:18 PM6/23/20158:30 PMNew JerseyRFCLoad shedding of 100 Megawatts or more implemented under emergency operational policy

Loss of electric service to more than 50,000 customers for 1 hour or more
System Operations198156,338Load Shed
June2015-06-236:30 PM6/24/20155:00 AMConnecticut, Maine, Massachusetts, New Hampshire, Rhode Island, VermontNPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown62,442Weather
June2015-06-235:06 PM6/26/20154:00 PMNew Castle County, DelawareRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown65,000Weather
June2015-06-236:26 PMUnknownUnknownNew JerseyNPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather9073,000Weather
June2015-06-235:30 PM6/23/20157:00 PMDelaware County, PA; Chester County, PARFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown200,000Weather
June2015-06-236:00 PM6/30/20156:00 PMGloucester County, Burlington County, Atlantic County, Cape May County, New JerseyRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown263,000Weather
June2015-06-262:00 AMUnknownUnknownKansasSPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown110,000Weather
June2015-06-275:00 PM6/30/20155:18 PMWayne County, MichiganRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown68,000Weather
June2015-06-297:21 PM6/29/20157:42 PMWashingtonWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSevere Weather00Weather
June2015-06-3010:50 AM7/1/20159:00 PMCaliforniaWECCPublic appeal to reduce the use of electricitySevere WeatherUnknownUnknownWeather
June2015-06-302:00 PM6/30/20159:00 PMCaliforniaWECCPublic appeal to reduce the use of electricitySevere WeatherUnknownUnknownWeather
July2015-07-035:17 PM7/3/201511:30 PMTexasTREUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSystem Operations35030,000Operations
July2015-07-038:30 AM7/3/20152:30 PMButte County, CaliforniaWECCSuspected Physical AttackSuspicious Activity00physical Attack
July2015-07-137:40 PM7/15/201512:15 PMVirginiaRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown52,739Weather
July2015-07-132:14 PM7/16/20156:00 AMOhio, KentuckyRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather48068,339Weather
July2015-07-148:00 PM7/15/20159:23 AMAlabamaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather366111,644Weather
July2015-07-143:29 PM7/15/201511:55 AMArkansasSPPUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSevere WeatherUnknownUnknownWeather
July2015-07-152:00 AM7/15/20152:55 AMCaliforniaWECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSystem Operations3600Operations
July2015-07-164:45 PM7/16/20155:48 PMTexasSPPLoad shedding of 100 Megawatts or more implemented under emergency operational policySystem Operations11717,311Load Shed
July2015-07-186:26 PM7/18/20159:03 PMCaliforniaWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSystem Operations3070Islanding
July2015-07-187:59 PM7/18/201510:45 PMCaliforniaWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather16078,164Weather
July2015-07-182:00 AM7/19/20157:00 AMHenepin and Ramsey County, MinnesotaMROLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather250250,000Weather
July2015-07-2112:47 PM7/21/20151:12 PMWashingtonWECCLoad shedding of 100 Megawatts or more implemented under emergency operational policySystem Operations200UnknownLoad Shed
July2015-07-273:52 AM7/27/20154:36 AMCaliforniaWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSystem OperationsUnknown484Islanding
July2015-07-2812:05 PM7/28/201512:26 PMPuerto RicoN/ASystem-wide voltage reductions of 3 percent or moreSystem Operations150UnknownOperations
July2015-07-294:45 PM7/29/20159:00 PMNew YorkNPCCFuel supply emergencies that could impact electric power system adequacy or reliabilitySystem Operations5000Fuel Supply Deficiency
July2015-07-301:00 PMUnknownUnknownTennesseeSERCSuspected Physical AttackVandalism00Physical Attack
July2015-07-309:50 AM7/30/20157:00 PMTexasTREPublic appeal to reduce the use of electricitySystem OperationsUnknownUnknownPublic Appeal
July2015-07-3110:55 AMUnknownUnknownWashingtonWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSystem Operations90Islanding
August2015-08-025:45 PM8/4/20153:00 AMMichigan: Emmet County; Grand Traverse County; Leelanau County; Kalkaska County; Benzie County; Manistee County; Wexford County; Missaukee County; Mecosta County;RFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown162,000Weather
August2015-08-038:27 AM8/4/20151:18 AMArizona: New MexicoWECCSuspected Physical AttackSabotage0UnknownPhysical Attack
August2015-08-031:00 AM8/5/201512:00 AMMichiganRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown72,520Weather
August2015-08-0312:30 AM8/3/20152:00 AMIllinoisRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown115,000Weather
August2015-08-047:17 AM8/5/201512:52 PMMassachusetts: Rhode Island:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown132,000Weather
August2015-08-117:30 PM8/13/20154:05 AMTexas: Houston;TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown100,000Weather
August2015-08-133:15 PM8/13/20157:00 PMTexas: Williamson County;TREPublic appeal to reduce the use of electricityOtherUnknownUnknownPublic Appeal
August2015-08-279:51 PM8/28/20156:00 PMPuerto RicoWECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incident / Loss of electric service to more than 50,000 customers for 1 hour or moreSystem Operations360UnknownOperations
August2015-08-291:00 PM8/31/20157:00 AMWashington: King County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather1,20064,000Weather
August2015-08-2911:00 AM9/4/20153:00 PMKing County, Skagit County, Whatcom County, Kitsap County, Pierce County, Thurston County, Island County, WashingtonWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather250250,000Weather
August2015-08-2910:00 AMUnknownUnknownWashingtonWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown500,000Weather
September2015-09-032:33 AM9/3/20156:25 AMMichiganRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown50,114Weather
September2015-09-135:56 PM9/13/20158:37 PMNew York: Dutchess County;NPCCSuspected Physical AttackVandalism00Physical Attack
September2015-09-201:12 PM9/20/20151:44 PMCaliforniaWECCLoad shedding of 100 Megawatts or more implemented under emergency operational policySystem Operations150UnknownLoad Shed
September2015-09-293:40 PM9/29/20153:41 PMOregonWECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
October2015-10-136:30 AM10/13/20158:30 AMUtah: Emery County;WECCSuspected Physical AttackVandalism00Physical Attack
October2015-10-1310:25 AM10/13/20156:00 PMTexasTREPublic appeal to reduce the use of electricityOtherUnknownUnknownPublic Appeal
October2015-10-134:32 PM10/13/20158:39 PMCaliforniaWECCPublic appeal to reduce the use of electricityOther41,788UnknownPublic Appeal
October2015-10-1612:25 PM10/16/201512:56 PMUtahWECCSuspected Physical AttackVandalism00Physical Attack
October2015-10-187:00 AM10/18/201511:29 PMCalifornia: Central Coast area;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather8855,677Weather
October2015-10-239:42 AM10/23/20151:26 PMPuerto RicoN/AElectrical System Separation (Islanding) where part or parts of power grid remain(s) operational / Load shedding of 100 Megawatts or more implemented under emergency operational policy / System-wide voltage reductions of 3 percent of more / Loss of electric service to more than 50,000 customers for 1 hour or moreSystem Operations500300,000Islanding
October2015-10-281:38 PM10/29/20155:00 PMPennsylvania: Columbia County; Montour County; Northumberland County;RFCSuspected Physical AttackOtherUnknown35,000physical Attack
October2015-10-303:00 PM10/30/20154:00 PMOregon: Josephine County;WECCSuspected Physical AttackOther00physical Attack
October2015-10-3112:45 AM11/1/20154:05 PMTexas: Harris County;TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown130,252Weather
November2015-11-0111:53 AM11/1/201512:00 PMOhio: Hamilton County;RFCSuspected Physical AttackVandalism00physical Attack
November2015-11-025:37 PM11/4/20159:00 AMArkansas: Hot Spring County;SERCSuspected Physical AttackSabotage40physical Attack
November2015-11-1012:00 PM11/10/20152:00 PMIndiana: Dearborn County;RFCSuspected Physical AttackSabotage00physical Attack
November2015-11-1311:30 AM11/13/201511:35 AMNew YorkNPCCSuspected Physical AttackSuspicious ActivityUnknownUnknownphysical Attack
November2015-11-179:00 AMUnknownUnknownWashington: Snohomish County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather90089,000Weather
November2015-11-171:30 PMUnknownUnknownWashington: Stevens County, Lincoln County, Adams County, Whitman County, Spokane County; Idaho: Bonner County, Kootenai County, Shoshone County, Benewah County, Idaho County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown182,000Weather
November2015-11-1710:00 AMUnknownUnknownWashingtonWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown300,000Weather
November2015-11-218:30 PM11/23/20151:00 AMMichiganRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown60,000Weather
November2015-11-286:00 AMUnknownUnknownOklahomaSPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown35,000Weather
November2015-11-286:00 AM11/30/20151:00 PMOklahomaSPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown55,609Weather
November2015-11-294:48 PM11/29/20156:20 PMPuerto RicoN/ASystem-wide voltage reductions of 3 percent or moreSystem Operations00Operations
November2015-11-306:18 AM11/30/20159:18 PMPuerto RicoN/ASystem-wide voltage reductions of 3 percent or moreSystem Operations10086,559Operations
December2015-12-021:03 PM12/3/201512:29 PMKansas: Thomas County;SPPSuspected Physical AttackVandalism00Physical Attack
December2015-12-057:22 PM12/6/20155:27 AMNew York: Orange County, Sullivan County; Pennsylvania: Pike County;NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreOther11052,476Operations
December2015-12-059:00 PM12/5/201510:30 PMKansasSPPSuspected Physical AttackVandalism00Physical Attack
December2015-12-082:00 PM12/8/20152:01 PMNevada: Clark County;WECCSuspected Physical AttackSabotage00Physical Attack
December2015-12-096:06 PM12/9/20159:52 PMPuerto RicoSystem-wide voltage reductions of 3 percent or moreSystem Operations00Operations
December2015-12-094:00 AM12/9/201511:00 AMWashingtonWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather11576,300Weather
December2015-12-103:53 AM12/10/20154:08 AMCalifornia: Plumas CountyWECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSevere Weather249,956Islanding
December2015-12-109:25 PM12/10/201510:30 PMMissouri: New Madrid County;SERCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSystem Operations4001Operations
December2015-12-105:55 PM12/10/20155:56 PMCalifornia: Stanislaus County;WECCSuspected Physical AttackVandalismUnknownUnknownPhysical Attack
December2015-12-106:01 AM12/10/20157:13 AMCalifornia: Northern;WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operationalSevere Weather299,956Weather
December2015-12-243:00 AM12/26/201512:00 AMMichigan: Antrim County, Charlevoix County, Manistee County, Mecosta County, Kalkaska County, Grand Traverse County, Osceola County, Lake County, Newaygo County, Clare County, Isabella County;RFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown168,000Weather
December2015-12-267:30 PMUnknownUnknownTexasTRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown70,000Weather
December2015-12-266:00 PM12/30/20156:00 AMTexas: Oklahoma:SPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown116,800Weather
December2015-12-275:00 PMUnknownUnknownOklahomaSPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown50,500Weather
December2015-12-2711:38 PM12/28/20155:00 PMOklahomaSPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown54,476Weather
December2015-12-298:30 AM12/29/20158:31 AMMaineNPCCSuspected Physical AttackSabotage00Physical Attack
December2015-12-3111:00 AMUnknownUnknownMissouriSERCSuspected Physical AttackSabotage00Physical Attack
December2015-12-315:00 PM12/31/20159:40 PMOklahoma: Blaine County;SPPPublic appeal to reduce the use of electricitySevere Weather81,500Weather
January2016-01-045:15 AM1/5/20168:00 AMWisconsin: Milwaukee County;MROSuspected Physical AttackSabotage00Physical Attack
January2016-01-108:46 PM1/11/20165:25 AMMaine: Connecticut: Massachusetts: Vermont: New Hampshire: Rhode Island:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown59,859Weather
January2016-01-118:16 PM1/11/201611:00 PMPennsylvania: Chester County;RFCSuspected Physical AttackVandalism00Physical Attack
January2016-01-148:27 AM1/14/201612:00 PMDelaware:RFCSuspected Physical AttackVandalism00Physical Attack
January2016-01-1712:00 PM1/17/20161:00 PMUtah: Salt Lake County;WECCSuspected Physical AttackSabotage00Physical Attack
January2016-01-223:52 PM1/24/201612:30 PMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown150,000Weather
January2016-01-237:49 AM1/23/20169:05 AMNew Jersey:RFCLoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown50,900Weather
February2016-02-0511:21 AM2/6/20163:48 PMConnecticut: Massachusetts: Rhode Island:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown115,057Weather
February2016-02-0711:30 AMUnknownUnknownNew York: Orange CountyNPCCSuspected Cyber AttackCyber AttackUnknownUnknownCyber Attack
February2016-02-071:21 PM2/7/20161:42 PMUtah: Salt Lake CountyWECCSuspected Physical AttackVandalism00Physical Attack
February2016-02-072:58 PMUnknownUnknownOregon: Klamath CountyWECCSuspected Physical AttackSabotageUnknownUnknownPhysical Attack
February2016-02-1312:44 PM2/13/20164:27 PMCaliforniaSERCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemIslanding74,300Islanding
February2016-02-168:35 AM2/16/20165:28 PMVirginia: Roanoke County, Montgomery County; West Virginia: Kanawha County, Cabell County; Tennessee: Sullivan County;RFCLoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown52,640Weather
February2016-02-1910:00 PM2/20/201611:13 PMMichiganRFCLoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown145,314Weather
February2016-02-213:54 PM2/21/20165:07 PMOregon: Klamath CountyWECCSuspected Physical AttackSabotage00Physical Attack
February2016-02-249:10 AM2/24/201610:15 AMDelawareRFCSuspected Physical AttackVandalism00physical Attack
February2016-02-242:45 PM2/25/20165:00 AMNorth Carolina: South CarolinaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreWeather400284,610Weather
February2016-02-251:44 AM2/25/20162:45 PMConnecticut: Maine: Massachusetts: Rhode Island: Vermont:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown114,190Weather
February2016-02-2612:01 AMUnknownUnknownCalifornia: San Bernardino CountyWECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
February2016-02-264:35 PM2/26/20168:22 PMArizona: Maricopa CountyWECCSuspected Physical AttackSabotage - Operator Action(s)22,713physical Attack
March2016-03-011:35 PMUnknownUnknownIdaho: Ada County;WECCSuspected Physical AttackVandalism00physical Attack
March2016-03-013:00 PMUnknownUnknownWashington: King County, Whatcom County, Kitsap County, Skagit County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown56,000Weather
March2016-03-0311:00 AM4/6/20167:47 PMCalifornia: San Bernardino County;WECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
March2016-03-0812:00 AM3/8/201612:00 AMIdaho: Bannock County;WECCSuspected Physical AttackSabotage00physical Attack
March2016-03-104:00 AM3/11/201611:59 AMWashington: Kitsap County, King County, Whatcom County, Island County, Skagit County;WECCSuspected Physical AttackSabotage00Physical Attack
March2016-03-132:00 PMUnknownUnknownWashington: Island County, Skagit County, Whatcom County, King County, Kitsap County, Pierce County, Thurston County;WECCSuspected Physical AttackSabotage00Physical Attack
March2016-03-134:55 PMUnknownUnknownWashington:WECCSuspected Physical AttackVandalism00Physical Attack
March2016-03-235:00 AM3/25/201611:59 PMColorado: Denver, City and County of[12];WECCLoss of electric service to more than 50,000 customers for 1 hour or moreWeather00Weather
March2016-03-2712:00 PM3/27/20161:00 PMNevada: Clark County;WECCSuspected Physical AttackSabotageUnknown110,000Physical Attack
March2016-03-309:12 PM3/31/20163:00 PMMassachusetts: Middlesex County[13];NPCCSuspected Physical AttackSabotage20050,500Physical Attack
April2016-04-014:37 PM4/1/20166:00 PMFlorida: Hillsborough CountyFRCCSuspected Physical AttackSabotage00Physical Attack
April2016-04-0211:08 AM4/2/201611:33 AMCaliforniaWECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSystem Operations3600Operations
April2016-04-1211:30 AM4/12/20164:43 PMWashington: Pend Oreille CountyWECCSuspected Cyber AttackCyber Attack00Cyber Attack
April2016-04-144:49 PM4/15/20168:42 PMMaryland: Baltimore CountyRFCSuspected Physical AttackSabotage00Physical Attack
April2016-04-1510:00 AM4/15/201611:00 AMUtah: Weber CountyWECCSuspected Physical AttackVandalism00Physical Attack
April2016-04-185:05 AM4/20/20167:55 AMTexas: Harris CountyTRELoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown415,103Weather
April2016-04-271:36 PMUnknownUnknownTennesseeSERCSuspected Physical AttackVandalism00Physical Attack
April2016-04-276:00 PM4/27/20166:05 PMTexas: Rusk CountyTRESuspected Physical AttackSabotage00Physical Attack
April2016-04-275:50 AM4/28/20161:35 AMTexas: Harris CountyTRELoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown214,864Weather
May2016-05-077:49 AM5/7/20169:02 AMNew York: Dutchess County;NPCCSuspected Physical AttackSabotage00Physical Attack
May2016-05-089:12 AMUnknownUnknownWashington: Clark County;WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemIslandingUnknownUnknownIslanding
May2016-05-108:45 PM5/13/20163:00 AMTexas: Dallas County, Tarrant County, Parker County;TRELoss of electric service to more than 50,000 customers for 1 hour or moreDistribution InterruptionUnknown85,000Distribution Interruption
May2016-05-149:25 PM5/15/20165:24 PMMissouri:SERCSuspected Physical AttackSabotage00Physical Attack
May2016-05-199:36 PM5/20/20161:00 AMUtah:WECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSystem Operations46185,179Operations
May2016-05-2012:00 AM5/22/20165:00 AMLouisiana:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreDistribution InterruptionUnknown85,000Distribution Interruption
May2016-05-201:15 AMUnknownUnknownLouisiana:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreWeatherUnknown57,184Weather
May2016-05-248:00 AMUnknownUnknownMissouri:SERCSuspected Physical AttackVandalism00Physical Attack
May2016-05-269:29 PM5/27/201612:40 AMNew York:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreTransmission Interruption8256,645Transmission Interruption
May2016-05-317:30 AM6/13/20167:27 AMNew York: Tompkins County;NPCCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency150UnknownFuel Supply Deficiency
June2016-06-0712:00 PM6/7/201612:15 PMUtahWECCSuspected Physical AttackSabotage00Physical Attack
June2016-06-147:59 AM6/14/20168:00 AMNew JerseyRFCSuspected Physical AttackVandalism00Physical Attack
June2016-06-174:30 AM6/17/20164:31 AMDelawareRFCSuspected Physical AttackVandalism00Physical Attack
June2016-06-173:40 PM6/18/20168:34 AMGeorgia, Alabama, Mississippi, FloridaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreWeather30491,260Weather
July2016-07-024:00 AM7/4/201612:40 AMOregon: Multnomah CountyWECCSuspected Physical AttackActual Physical Event00Physical Attack
July2016-07-052:45 AM7/6/20163:00 AMTexas: Dallas County, Tarrant CountyTRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown52,000Weather
July2016-07-055:30 PM7/6/20164:00 PMMinnesota, WisconsinMROLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown250,000Weather
July2016-07-075:53 AM7/7/20168:40 AMNorth Carolina: New Hanover CountySERCActual Physical AttackVandalism00Physical Attack
July2016-07-074:20 AM7/7/20168:00 AMKansas: Johnson County; Missouri: Jackson County, Platte County, Cass County, Buchanan County, Atchison County, Andrew County, Clay County, Nodaway CountySERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown58,500Weather
July2016-07-086:00 PMUnknownUnknownWest Virginia: VirginiaRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown62,961Weather
July2016-07-087:00 PM7/9/201612:00 AMMichigan: Wayne County, Oakland County, Macomb County, St. Clair County, Lapeer County, Tuscola County, Sanilac County, Huron CountyRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown160,895Weather
July2016-07-088:50 PM7/9/20167:25 PMNorth CarolinaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather600203,345Weather
July2016-07-095:45 PM7/11/20162:00 PMTexas: Dallas CountyTRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown62,000Weather
July2016-07-122:10 PM7/12/20168:33 PMPuerto RicoPRVoltage ReductionSystem Operations450218,000Operations
July2016-07-131:00 PM7/13/20161:01 PMWashingtonWECCSuspected Physical AttackVandalism00Physical Attack
July2016-07-133:00 PMUnknownUnknownTennessee: Shelby CountySERCPublic AppealSystem OperationsUnknownUnknownPublic Appeal
July2016-07-145:30 PM7/16/20168:00 PMOklahoma: ArkansasSPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown7,300Weather
July2016-07-142:44 PM7/15/20164:00 AMOklahomaSPPLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown96,966Weather
July2016-07-144:30 PM7/16/201612:00 AMArkansas: Louisiana: Mississippi: TexasSPP, SERC, TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown170,244Weather
July2016-07-193:45 PM7/19/20167:29 PMIdahoWECCIslanding, Uncontrolled Loss 300+ MWSystem Operations290UnknownOperations
July2016-07-193:45 PM7/19/20167:25 PMIdahoWECCIslanding, Uncontrolled Loss 300+ MWSystem Operations485UnknownOperations
July2016-07-217:21 PM7/22/201612:09 AMPuerto RicoPRLoad Shed 100+ MW, Voltage ReductionSystem Operations200266,000Load Shed
July2016-07-216:18 AM7/21/20162:45 PMDelaware: New Castle CountyRFCSuspected Physical AttackSuspicious Activity00Physical Attack
July2016-07-2211:50 PM7/23/20169:10 AMMassachusetts: Connecticut: Rhode Island: New Hampshire: Vermont: MaineNPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown57,058Weather
July2016-07-233:15 PM7/23/20167:53 PMPennsylvania: Cambria CountyRFCVoltage ReductionSystem Operations87UnknownOperations
July2016-07-237:30 PM7/24/20167:30 AMConnecticut: Massachusetts: New Hampshire: Vermont: Rhode IslandNPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown101,073Weather
July2016-07-256:51 PM7/26/20162:19 AMPuerto RicoPRVoltage ReductionSystem Operations00Operations
July2016-07-266:51 PM7/27/20161:45 AMPuerto RicoPRVoltage ReductionSystem Operations2537,100Operations
July2016-07-276:50 PM7/28/20161:38 AMPuerto RicoPRVoltage ReductionSystem Operations80106,300Operations
July2016-07-286:51 PM7/29/20162:02 AMPuerto RicoPRVoltage ReductionSystem Operations2221,600Operations
July2016-07-297:09 PM7/29/20167:57 PMPuerto RicoPRVoltage ReductionSystem Operations00Operations
August2016-08-042:15 PM8/4/20162:23 PMDelaware: New Castle County;RFCSuspected Physical AttackVandalism00Physical Attack
August2016-08-076:39 PM8/7/20168:27 PMNew Mexico: Bernalillo County;WECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSystem OperationsUnknownUnknownOperations
August2016-08-106:00 AMUnknownUnknownCalifornia: Butte County;WECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
August2016-08-114:30 PM8/11/20167:15 PMOhio:RFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown62,140Weather
August2016-08-1311:42 AM8/13/20162:07 PMSouth Carolina:SERCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSystem Operations5060Operations
August2016-08-202:18 PM8/20/20169:19 PMNew York:NPCCActual Physical AttackActual Physical EventUnknown40,000Physical Attack
August2016-08-235:00 PM8/24/201612:05 AMTexas: Harris County;TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown72,200Weather
August2016-08-247:18 PM8/24/20167:47 PMWashington: King County;WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemIslanding9232UnknownIslanding
August2016-08-246:13 PM8/24/20167:14 PMPuerto Rico:PRUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSystem Operations600400,000Operations
August2016-08-256:40 PM8/26/20166:19 PMOregon: Crook County;WECCSuspected Physical AttackVandalism00Physical Attack
August2016-08-312:52 PMUnknownUnknownWashington: Clark County;WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemIslanding00Islanding
August2016-08-319:45 AM8/31/20169:55 AMColorado:WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemTransmission Interruption00Transmission Interruption
September2016-09-0110:00 PMUnknownUnknownFlorida:FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather100UnknownWeather
September2016-09-025:45 AM9/3/201612:30 AMGeorgia:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown57,000Weather
September2016-09-0212:40 AM9/4/20168:00 PMFlorida: Leon County, Wakulla County;FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather45075,000Weather
September2016-09-024:00 AM9/2/20164:00 PMFlorida: Alachua County, Bay County, Citrus County, Columbia County, Dixie County, Franklin County, Gilchrist County, Gulf County, Hamilton County, Hardee County, Hernando County, Highlands County, Jefferson County, Lafayette County, Lake County, Levy County, Madison County, Marion County, Orange County, Osceola County, Pasco County, Pinellas County, Polk County, Seminole County, Sumter County, Suwannee County, Taylor County, Volusia County, Wakulla County;FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather22590,000Weather
September2016-09-066:12 PM9/6/20169:24 PMWashington: Clark County;WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemIslanding300UnknownIslanding
September2016-09-088:30 AM9/25/201612:00 AMNew York: Tompkins County;NPCCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency210UnknownFuel Supply Deficiency
September2016-09-082:49 PM9/8/20163:03 PMWashington:WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemIslanding00Islanding
September2016-09-109:42 AM9/10/20169:57 AMWashington: Clark County;WECCLoad shedding of 100 Megawatts or more implemented under emergency operational policyGeneration Inadequacy135UnknownGeneration Interruption
September2016-09-1112:05 PM9/11/20163:10 PMConnecticut: Massachusetts: New Hampshire: Rhode Island: Vermont: Maine:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown57,960Weather
September2016-09-1212:30 PM9/12/20165:56 PMNew Mexico: Bernalillo County, Sandoval County, Santa Fe County, Valencia County;WECCLoad shedding of 100 Megawatts or more implemented under emergency operational policyGeneration Inadequacy11053,753Generation Interruption
September2016-09-212:30 PM9/24/20162:30 AMPuerto Rico:Complete operational failure or shut-down of the transmission and/or distribution electrical systemSystem Operations27501,475,000Operations
September2016-09-217:44 PM9/21/20169:17 PMTexas: Lubbock County;TREPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsActual Physical Event00Physical Attack
September2016-09-2210:56 AM9/22/201611:41 AMIowa: Black Hawk County;MROComplete operational failure or shut-down of the transmission and/or distribution electrical systemSystem Operations6919,124Operations
September2016-09-2512:49 PM9/25/20166:20 PMUtah: Kane County, Garfield County; Arizona: Coconino County, Mohave CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism2010,000Physical Attack
October2016-10-0112:24 PM10/02/20162:04 AMCalifornia: Mendocino County;WECCPhysical attack that causes major interruptions or impacts to critical infrastructure facilities or to operationsActual Physical Event00Physical Attack
October2016-10-0211:30 PM10/05/20168:00 AMUtah:WECCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemTransmission Interruption504,000Transmission Interruption
October2016-10-033:09 PM10/04/20167:00 PMTexas:TREPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemPublic AppealUnknownUnknownPublic Appeal
October2016-10-053:51 PMUnknownUnknownCalifornia: Imperial County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
October2016-10-0511:32 AM10/05/20167:00 PMTexas:TREPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemPublic AppealUnknownUnknownPublic Appeal
October2016-10-069:50 AM10/06/20167:00 PMTexas:TREPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemPublic AppealUnknownUnknownPublic Appeal
October2016-10-067:30 PM10/8/20166:00 PMFlorida:FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather56001,200,000Weather
October2016-10-0711:08 AM10/07/20167:00 PMTexas:TREPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemGeneration InadequacyUnknownUnknownGeneration Interruption
October2016-10-074:22 PM10/12/201611:00 AMGeorgia:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather12236,384Weather
October2016-10-078:00 AM10/09/20161:00 PMFlorida: Alachua County, Bay County, Citrus County, Columbia County, Dixie County, Franklin County, Gilchrist County, Gulf County, Hamilton County, Hardee County, Hernando County, Highlands County, Jefferson County, Lafayette County, Lake County, Levy County, Madison County, Marion County, Orange County, Osceola County, Pasco County, Pinellas County, Polk County, Seminole County, Sumter County, Suwannee County, Taylor County, Volusia County, Wakulla County;FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather413165,000Weather
October2016-10-0710:45 PMUnknownUnknownFlorida:FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknownUnknownWeather
October2016-10-0711:00 PMUnknownUnknownSouth Carolina: Allendale County, Bamberg County, Beaufort County, Berkeley County, Charleston County, Chesterfield County, Clarendon County, Colleton County, Darlington County, Dorchester County, Florence County, Georgetown County, Hampton County, Horry County, Jasper County, Kershaw County, Lee County, Marion County, Marlboro County, Orangeburg County, Richland County, Sumter County, Williamsburg County;SERCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incident
Loss of electric service to more than 50,000 customers for 1 hour or more
Severe WeatherUnknownUnknownWeather
October2016-10-082:05 PM10/09/20166:06 AMNorth Carolina:SERCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSevere WeatherUnknown44,875Weather
October2016-10-081:10 AMUnknownUnknownSouth Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather1050290,824Weather
October2016-10-088:21 AM10/13/20165:30 PMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknownUnknownWeather
October2016-10-101:15 PM10/10/20167:00 PMTexas:TREPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemGeneration InadequacyUnknownUnknownGeneration Interruption
October2016-10-1212:09 PM10/12/20161:16 PMNevada: Clark County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism41,671Physical Attack
October2016-10-182:06 PM10/21/20163:00 PMOregon: Deschutes County, Lake County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
October2016-10-2012:30 PM10/20/201612:31 PMOregon:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
October2016-10-257:40 AM10/27/20167:40 AMTennessee: Shelby County;SERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
October2016-10-265:26 AM10/26/20165:27 AMWyoming: Sweetwater County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
October2016-10-281:29 PM10/28/20161:38 PMCalifornia: Plumas County;WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemIslanding4482Islanding
October2016-10-318:06 AM10/31/20163:53 PMNorth Carolina: Stokes County;SERCPhysical attack that causes major interruptions or impacts to critical infrastructure facilities or to operationsActual Physical Event00Physical Attack
November2016-11-018:55 PMUnknownUnknownWashington: Clark County;WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemTransmission Interruption00Transmission Interruption
November2016-11-0911:59 AM11/09/20166:15 PMCalifornia: Stanislaus County, San Joaquin County, Alameda County, Tuolumne County;WECCCyber event that could potentially impact electric power system adequacy or reliabilityCyber Attack00Cyber Attack
November2016-11-096:44 AM11/09/20167:44 AMCalifornia:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
December2016-12-081:00 AM12/08/20162:30 AMOregon: Multnomah County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
December2016-12-117:45 AM12/11/20167:46 AMUtah: Utah County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
December2016-12-132:09 PM12/13/20162:30 PMCalifornia: Riverside County;WECCCyber event that could potentially impact electric power system adequacy or reliabilityCyber Event00Cyber Attack
December2016-12-156:30 AMUnknownUnknownCalifornia: Merced County;WECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply DeficiencyUnknownUnknownFuel Supply Deficiency
December2016-12-167:45 AM12/16/20168:45 AMOregon: Multnomah County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
December2016-12-264:00 AM12/26/20166:00 AMWashington:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
December2016-12-284:03 AM12/31/20166:00 AMCalifornia:WECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
December2016-12-308:55 AM12/30/20168:56 AMVermont: Chittenden County;NPCCCyber event that could potentially impact electric power system adequacy or reliabilityOther00Cyber Attack
December2016-12-302:30 AM12/30/20167:00 PMMaine:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreWeather or Natural DisasterUnknown85,263Weather
January2017-01-054:56 PM01/05/20174:57 PMFlorida: Martin County;FRCCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSuspected Physical Attack00Physical Attack
January2017-01-0811:59 PMUnknownUnknownCaliforniaWECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
January2017-01-089:07 AM01/13/20172:30 PMCaliforniaWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown106,000Weather
January2017-01-107:30 PM01/13/20172:30 PMCaliforniaWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown87,000Weather
January2017-01-156:35 AM01/15/20177:44 AMCalifornia: Los Angeles County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreTransmission Disruption176126,000Transmission Interruption
January2017-01-159:27 AM01/17/20171:58 AMOklahoma: Harper County;SPPElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemSevere Weather1788Weather
January2017-01-186:05 PM01/19/201712:05 AMCaliforniaWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown75,000Weather
January2017-01-226:00 AMUnknownUnknownCaliforniaWECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
January2017-01-224:00 PM01/23/20173:26 AMAlabama: Georgia: Mississippi: Florida:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather10029,965Weather
January2017-01-224:15 AM01/24/20172:00 PMCaliforniaWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather9764,000Weather
February2017-02-021:04 AM2/2/20175:00 AMNew Mexico: Bernalillo County, Santa Fe County;WECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentTransmission Interruption396149,223Transmission Interruption
February2017-02-021:11 AMUnknownUnknownNew Mexico: Bernalillo County;WECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentTransmission Interruption400UnknownTransmission Interruption
February2017-02-061:00 AM2/6/20177:30 PMWashington: Skagit County, King County, Kitsap County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown103,000Weather
February2017-02-094:05 PM2/10/20175:15 AMConnecticut: Massachusetts: Rhode Island:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown11,525Weather
February2017-02-113:46 PM2/11/20173:50 PMUtahWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsActual Physical Attack00Physical Attack
February2017-02-131:00 PM2/15/20171:35 PMNorth Carolina: Union County;SERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
February2017-02-174:32 AM2/17/20175:02 AMMissouri: Arkansas: Oklahoma: Texas:SPPCyber event that could potentially impact electric power system adequacy or reliabilitySystem Operations00Cyber Attack
February2017-02-171:00 PM2/17/20171:15 PMNevada: Clark County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
February2017-02-173:00 PM2/20/201711:00 AMCalifornia: Los Angeles County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown111,591Weather
February2017-02-178:09 AM2/22/20177:30 PMCaliforniaWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather254169,250Weather
March2017-03-018:30 AM03/01/20172:00 PMTennessee: Kentucky:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown58,000Weather
March2017-03-0111:49 AM03/02/20179:30 PMKentucky: West Virginia:RFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown98,575Weather
March2017-03-0212:20 PM03/02/201711:45 PMConnecticut: Maine: Massachusetts: New Hampshire: Rhode Island: Vermont:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown54,316Weather
March2017-03-068:00 PM03/07/20171:00 AMMissouri: Jackson County, Platte County, Cass County, Lafayette County, Chariton County, Carroll County, Clay County, Johnson County;SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown97,734Weather
March2017-03-083:33 PMUnknownUnknownNew YorkNPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown50,000Weather
March2017-03-0811:30 AM03/08/20177:52 PMOhioRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown71,012Weather
March2017-03-081:30 PM03/08/20174:30 PMNew YorkNPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather/Transmission InterruptionUnknown106,869Weather
March2017-03-089:30 AM03/11/20175:00 AMMichigan: Jackson County, Calhoun County, Ingham County, Hillsdale County, Washtenaw County, Kent County, Ottawa County, Midland County, Saginaw County;RFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown343,000Weather
March2017-03-0812:00 PM03/11/201711:31 AMMichiganRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown800,000Weather
March2017-03-129:56 AM03/12/201711:20 AMCalifornia: Imperial County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism01Physical Attack
March2017-03-1412:32 PMUnknownUnknownConnecticut: Massachusetts: Rhode Island: New Hampshire: Maine: Vermont:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown69,647Weather
March2017-03-218:00 PM03/22/20179:15 AMGeorgiaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather857257,000Weather
March2017-03-246:29 AM03/24/20177:13 AMOregon: Clatsop County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSabotage00Physical Attack
March2017-03-284:07 PM03/28/20174:08 PMOregon: Josephine County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSuspicious Activity00Physical Attack
March2017-03-293:30 AM03/31/20176:00 AMTexasTRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown175,000Weather
March2017-03-317:15 PM03/31/20179:07 PMMississippi: DeSoto County;SERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
April2017-04-0311:00 AM04/03/20178:00 PMAlabama, GeorgiaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather29086,330Weather
April2017-04-067:00 PMUnknownUnknownCaliforniaWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown100,000Weather
April2017-04-074:16 AMUnknownUnknownCalifornia: Fresno CountyWECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
April2017-04-074:33 AM04/07/20178:20 AMOregonWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather10064,852Weather
April2017-04-078:15 AM04/08/201712:14 AMOregon: Multnomah County, Washington County, Marion County, Clackamas CountyWECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown153,867Weather
April2017-04-137:50 AM04/13/20178:07 AMWashington: Pierce CountyWECCPhysical attack that causes major interruptions or impacts to critical infrastructure facilities or to operationsSabotage5310,000Physical Attack
April2017-04-179:25 AM04/17/20179:26 AMUtah: Emery CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSabotage00Physical Attack
April2017-04-204:00 PM04/20/20176:00 PMWyoming: Converse CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
April2017-04-219:06 AM04/21/20175:45 PMCalifornia: San Francisco, City and County of[10]WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSystem Operations13088,000Operations
April2017-04-2110:34 AM04/21/20173:55 PMKentucky: Bullitt CountySERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
April2017-04-2311:55 PM04/23/201711:56 PMOregon: Multnomah CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
April2017-04-245:32 AM04/24/20176:33 AMNorth Carolina: Mecklenburg CountySERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather24074,698Weather
April2017-04-301:00 AM04/30/20175:45 PMArkansas, Louisiana, MississippiSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown145,174Weather
May2017-05-0111:14 PM05/01/201711:34 PMOhioRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown92,390Weather
May2017-05-036:58 PM05/03/20179:15 PMCaliforniaWECCLoad shedding of 100 Megawatts or more implemented under emergency operational policyGeneration Inadequacy5720Generation Interruption
May2017-05-037:05 PM05/03/20179:00 PMCaliforniaWECCLoad shedding of 100 Megawatts or more implemented under emergency operational policyGeneration Inadequacy878UnknownGeneration Interruption
May2017-05-0311:00 PMUnknownUnknownPennsylvania: Philadelphia County, Montgomery CountyRFCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
May2017-05-045:00 AM05/04/201710:00 PMAlabama: GeorgiaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather20060,377Weather
May2017-05-075:15 AMUnknownUnknownCalifornia: Fresno CountyWECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
May2017-05-0711:30 PM05/08/20175:00 AMKentucky: Daviess CountySERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemGeneration Inadequacy800Generation Interruption
May2017-05-1111:05 AM05/11/20171:05 PMWashington: Yakima CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
May2017-05-195:30 AMUnknownUnknownMissouri: St. Louis CountySERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown70,696Weather
May2017-05-214:44 PM05/21/20175:43 PMIdaho: Lincoln County, Jerome CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism219,598Physical Attack
May2017-05-235:02 AM05/23/20178:40 AMTennessee: Davidson CountySERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism104,700Physical Attack
May2017-05-2711:00 PMUnknownUnknownTennessee: Shelby County, Putnam County, Knox County, Davidson County, Hamilton County; Alabama: Madison CountySERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown116,000Weather
May2017-05-2711:10 PMUnknownUnknownTennessee: Shelby CountySERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather391188,000Weather
May2017-05-284:27 PM05/28/20174:28 PMNevada: Clark CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
May2017-05-287:30 PM05/29/201710:00 PMLouisiana: TexasSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown103,000Weather
May2017-05-287:30 PM05/29/201710:00 PMTexas: LouisianaTRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown103,000Weather
June2017-06-071:12 PM06/07/20171:13 PMWashington: Yakima CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
June2017-06-112:39 PM06/11/20175:55 PMMichiganRFCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemTransmission Interruption63UnknownTransmission Interruption
June2017-06-111:25 PM06/11/20177:15 PMWisconsinMROLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown53,610Weather
June2017-06-117:00 AM06/11/201711:22 AMMinnesotaMROLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown70,000Weather
June2017-06-155:00 PM06/15/201710:00 PMAlabama, GeorgiaSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather27582,713Weather
June2017-06-168:00 PM06/17/20176:00 AMArkansasSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown76,000Weather
June2017-06-168:00 PMUnknownUnknownNebraska: Cass County, Douglas County, Sarpy CountyMROLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown76,000Weather
June2017-06-179:00 PM06/18/20177:00 AMKansas, Missouri: Jackson County, Platte County, Clay County, Cass CountyMROLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown84737Weather
June2017-06-2112:00 AM06/21/20171:00 AMOregon: Baker CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsPhysical Attack00Physical Attack
June2017-06-226:00 PM06/25/201712:45 PMMichigan: Wayne County, Monroe CountyRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown118,631Weather
June2017-06-294:00 AMUnknownUnknownLouisiana: Orleans ParishSERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism1306,467Physical Attack
June2017-06-307:45 AM06/30/20177:46 AMIdaho: Ada CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
July2017-07-0612:00 AMUnknownUnknownIdaho: Jerome CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
July2017-07-073:30 AM07/08/20177:30 PMMichigan: Kent County, Ottawa County, Muskegon County, Barry County, Oceana County, Eaton CountyRFCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown160000Weather
July2017-07-086:52 PM07/09/20178:00 AMCalifornia: Los Angeles CountyWECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentTransmission Interruption645176867Transmission Interruption
July2017-07-1110:00 AM07/11/201712:00 PMMinnesotaMROPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
July2017-07-1212:25 PM07/15/20179:00 AMTennesseeSERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
July2017-07-1212:25 PMUnknownUnknownTennessee: Shelby CountySERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalismUnknownUnknownPhysical Attack
July2017-07-184:03 AMUnknownUnknownMissouriSERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsActual Physical AttackUnknown700Physical Attack
July2017-07-184:23 PM07/18/20176:39 PMNevadaWECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSevere Weather00Weather
July2017-07-201:00 AM07/20/20179:46 AMUtah: Beaver CountyWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
July2017-07-2210:00 PM07/23/201712:00 PMMissouri: Clay County, Jackson County, Lafayette County, Platte County; Kansas: Johnson County, Miami County, Wyandotte CountySERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown112540Weather
July2017-07-2210:00 PMUnknownUnknownMissouriSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown115000Weather
July2017-07-2210:00 PMUnknownUnknownMissouriSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown131000Weather
July2017-07-234:00 AMUnknownUnknownMissouri: IllinoisSERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown82000Weather
July2017-07-276:00 AM07/27/201711:29 AMCalifornia: Butte CountyWECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
August2017-08-051:20 PM08/05/20172:20 PMCalifornia: Humboldt County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
August2017-08-2111:41 PM08/22/201712:21 AMCalifornia: Plumas County;WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemSystem Operations12Islanding
August2017-08-256:17 PM09/02/20175:00 PMTexas: Matagorda County, Nueces County, Aransas County, Refugio County, San Patricio County, Calhoun County, Victoria County, Jackson County, Live Oak County, Jim Wells County, Bee County, Lavaca County;TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown220400Weather
August2017-08-256:30 PM09/05/20175:00 PMTexas:TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown330000Weather
August2017-08-266:26 AM09/08/201712:00 AMTexas:TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown1076868Weather
August2017-08-2612:39 AM08/26/201712:52 AMTexas:TREElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemSevere WeatherUnknownUnknownWeather
August2017-08-275:10 AM09/08/201712:00 AMTexas: Harris County;TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown1076868Weather
August2017-08-302:15 AMUnknownUnknownTexas:TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown78500Weather
August2017-08-312:49 PM08/31/20175:14 PMCalifornia: Los Angeles County;WECCLoad shedding of 100 Megawatts or more implemented under emergency operational policySevere Weather1000Weather
September2017-09-013:41 PM09/01/20178:30 PMCalifornia:WECCLoad shedding of 100 Megawatts or more implemented under emergency operational policySevere Weather3370Weather
September2017-09-0912:00 AMUnknownUnknownFlorida: Hillsborough County, Pasco County, Polk County;FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather1275425000Weather
September2017-09-0912:30 PMUnknownUnknownFlorida:FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown3500000Weather
September2017-09-108:37 PMUnknownUnknownFlorida:FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown452555Weather
September2017-09-106:35 PM09/13/20175:00 PMFlorida: Alachua County, Bay County, Brevard County, Citrus County, Columbia County, Dixie County, Flagler County, Franklin County, Gilchrist County, Gulf County, Hamilton County, Hardee County, Hernando County, Highlands County, Jefferson County, Lafayette County, Lake County, Leon County, Levy County, Madison County, Marion County, Orange County, Osceola County, Pasco County, Pinellas County, Polk County, Seminole County, Sumter County, Suwannee County, Taylor County, Volusia County, Wakulla County;FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather45001000000Weather
September2017-09-1112:30 AMUnknownUnknownFlorida:FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather20020000Weather
September2017-09-112:27 AM09/15/20178:44 PMGeorgia:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather13239659Weather
September2017-09-1112:55 PM09/12/20178:00 AMSouth Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather687154832Weather
September2017-09-115:30 PM09/13/20179:30 AMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather365265729Weather
October2017-10-042:30 AMUnknownUnknownTennessee: Shelby County;SERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
October2017-10-041:20 AM10/04/20173:00 AMMississippi:SERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsActual Physical AttackUnknownUnknownPhysical Attack
October2017-10-083:00 AMUnknownUnknownAlabama: Florida: Mississippi:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather30691945Weather
October2017-10-092:03 AM10/17/20171:30 PMCalifornia:WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather/Transmission Interruption177117900Weather
October2017-10-096:44 AMUnknownUnknownCalifornia:WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemSevere Weather100UnknownWeather
October2017-10-129:09 AMUnknownUnknownMississippi: Coahoma County;SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSystem OperationsUnknownUnknownPublic Appeal
October2017-10-163:45 PM10/16/20174:09 PMWashington: Montana:WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemTransmission Interruption00Transmission Interruption
October2017-10-163:55 PM10/16/20174:10 PMWashington:WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemTransmission Interruption00Transmission Interruption
October2017-10-194:01 PM10/19/20174:02 PMUtah: Salt Lake County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSuspected Physical Attack00Physical Attack
October2017-10-206:30 PM10/20/201710:22 PMTexas:TREPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
October2017-10-203:44 AM10/20/20173:45 AMWashington:WECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSevere Weather900UnknownWeather
October2017-10-228:45 AM10/22/20172:00 PMLouisiana: Mississippi: Arkansas: Texas:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknownUnknownWeather
October2017-10-235:50 PM10/24/20176:17 PMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather440115144Weather
October2017-10-2512:00 PM10/25/20174:00 PMCalifornia:WECCCyber event that could potentially impact electric power system adequacy or reliabilitySuspicious ActivityUnknownUnknownCyber Attack
October2017-10-265:50 PMUnknownUnknownMontana: Big Horn County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsActual Physical Attack00Physical Attack
October2017-10-268:17 AM10/26/20178:41 AMWashington: Whatcom County; Montana:WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemTransmission Interruption00Transmission Interruption
October2017-10-268:17 AM10/26/20178:41 AMWashington: Clark County;WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemTransmission Interruption00Transmission Interruption
October2017-10-2911:40 PM11/01/20176:08 PMConnecticut: Massachusetts: New Hampshire: Maine: Rhode Island: Vermont:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown310453Weather
November2017-11-013:40 PM11/01/201710:00 PMKentucky: Daviess County;SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemGeneration Inadequacy00Generation Interruption
November2017-11-057:35 PM11/05/201711:09 PMOhio:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown89216Weather
November2017-11-0712:29 PMUnknownUnknownLouisiana:SERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSuspicious Activity00Physical Attack
November2017-11-098:45 AM11/09/20172:00 PMColorado: Weld County;WECCCyber event that could potentially impact electric power system adequacy or reliabilitySystem Operations00Cyber Attack
November2017-11-134:33 PM11/16/20176:00 AMWashington: King County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather8568430Weather
November2017-11-132:00 AM11/15/20178:17 AMWashington: Island County, King County, Kitsap County, Thurston County, Skagit County, Whatcom County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown236100Weather
November2017-11-163:05 PM11/16/20173:06 PMOregon: Tillamook County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
November2017-11-245:06 PM11/26/20175:22 PMNevada: Clark County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
December2017-12-049:53 PMUnknownUnknownCalifornia:WECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentSevere Weather/Transmission Interruption540263000Weather
December2017-12-056:50 AM12/05/20179:00 AMLouisiana:SERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
December2017-12-056:30 AM12/06/201710:00 AMMichigan: Oscoda County, Isabella County, Roscommon County, Ogemaw County;RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown117500Weather
December2017-12-078:00 PM12/08/20175:00 PMTexas: Bexar County;TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown88000Weather
December2017-12-089:30 AM12/08/201710:30 PMLouisiana: Mississippi:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown79000Weather
December2017-12-0810:00 AM12/10/20178:50 PMAlabama: Georgia: Mississippi:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather865301872Weather
December2017-12-101:25 AM12/10/20172:30 AMCalifornia: Ventura County, Santa Barbara County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather/Transmission Interruption11051323Weather
December2017-12-122:22 AM12/12/20172:25 AMNew York: Saratoga County;NPCCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsActual Physical Attack31,208Physical Attack
December2017-12-139:55 AM12/13/20172:45 PMNew York: Suffolk County;NPCCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
December2017-12-138:50 AMUnknownUnknownConnecticut: New Haven County[13];NPCCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSuspicious Activity00Physical Attack
December2017-12-181:00 PM12/18/20175:00 PMMississippi:SERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
December2017-12-198:40 AM12/19/201710:36 AMFlorida: Alachua County;FRCCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
December2017-12-297:00 AMUnknownUnknownNew York: Tompkins County;NPCCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency210UnknownFuel Supply Deficiency
December2017-12-296:15 AM12/29/201711:44 AMTexas: Calhoun County;TREPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSuspicious ActivityUnknownUnknownPhysical Attack
December2017-12-3111:54 PM01/01/20182:14 PMColorado:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
January2018-01-019:37 PM01/02/201810:30 AMTennessee:SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSystem OperationsUnknownUnknownPublic Appeal
January2018-01-015:43 PMUnknownUnknownTexas:TREPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSevere WeatherUnknownUnknownWeather
January2018-01-016:21 PM01/02/20186:11 PMTennessee:SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSevere WeatherUnknownUnknownWeather
January2018-01-0210:00 AM02/12/20188:00 AMNew York: Niagara County;NPCCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency675UnknownFuel Supply Deficiency
January2018-01-027:30 AMUnknownUnknownSouth Carolina:SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSevere Weather0717000Weather
January2018-01-026:45 AM01/02/20189:00 AMNorth Carolina: South Carolina:SERCSystem-wide voltage reductions of 3 percent or moreSevere Weather14998UnknownWeather
January2018-01-041:49 AM01/04/20182:09 AMTexas: Midland County;TREPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsActual Physical AttackUnknown500Physical Attack
January2018-01-121:08 PM01/12/20182:53 PMMichigan: Midland County, Genesee County;RFCyber event that causes interruptions of electrical system operationsSystem Operations4123007Cyber Attack
January2018-01-154:20 AM01/18/20185:48 AMTexas:TREPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSevere WeatherUnknownUnknownWeather
January2018-01-163:00 PM01/18/20181:00 PMTennessee: Shelby County;SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSystem OperationsUnknownUnknownPublic Appeal
January2018-01-161:57 PM01/16/20182:32 PMTexas:TREElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemSevere WeatherUnknownUnknownWeather
January2018-01-163:00 PM01/18/20181:00 PMTennessee:SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSevere WeatherUnknownUnknownWeather
January2018-01-175:10 AM01/17/20181:00 PMMississippi:SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSystem Operations1788420000Public Appeal
January2018-01-176:10 AM01/17/20182:00 PMLouisiana:SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSystem OperationsUnknownUnknownPublic Appeal
January2018-01-185:00 AM01/18/20189:45 AMMississippi:SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSystem Operations1760420000Public Appeal
January2018-01-186:00 AMUnknownUnknownLouisiana:SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSystem OperationsUnknownUnknownPublic Appeal
January2018-01-185:00 AM01/18/201811:00 AMArkansas: Mississippi: Louisiana: Texas:SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSevere Weather31500UnknownWeather
January2018-01-258:19 PM01/26/20182:00 AMPennsylvania: Montgomery County;RFCyber event that could potentially impact electric power system adequacy or reliabilitySuspicious ActivityUnknownUnknownCyber Attack
February2018-02-041:42 PM02/04/20183:25 PMCalifornia:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism97600Physical Attack
February2018-02-081:25 PM02/08/20181:31 PMCalifornia:WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemSystem Operations3010900Islanding
February2018-02-174:33 PM02/18/201812:00 AMOregon: Washington: California:WECCPhysical attack that causes major interruptions or impacts to critical infrastructure facilities or to operationsVandalism23300Physical Attack
February2018-02-175:56 PM02/18/20184:11 AMOregon: Washington: California:WECCPhysical attack that causes major interruptions or impacts to critical infrastructure facilities or to operationsVandalism23270Physical Attack
February2018-02-2812:08 PM03/01/20183:45 PMFlorida:FRCCCyber event that could potentially impact electric power system adequacy or reliabilitySystem Operations00Cyber Attack
February2018-02-2812:08 PM03/01/20183:45 PMFlorida:FRCCCyber event that could potentially impact electric power system adequacy or reliabilitySystem Operations00Cyber Attack
March2018-03-0111:43 AM03/01/201811:56 AMCalifornia:WECCElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemSevere Weather3810898Weather
March2018-03-019:57 PM03/02/201810:14 AMOhio:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown86501Weather
March2018-03-0110:20 PM03/04/20188:00 PMMichigan: Wayne County, Washtenaw County, Oakland County, Macomb County, Monroe County;RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown95000Weather
March2018-03-0211:17 PM03/03/201812:51 AMWashington: Clark County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
March2018-03-0211:34 AMUnknownUnknownNew York:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown50000Weather
March2018-03-025:00 PM03/06/201811:00 AMDelaware: Maryland:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown60000Weather
March2018-03-028:42 AMUnknownUnknownNew York:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown63331Weather
March2018-03-028:00 AM03/03/201811:00 PMVirginia: West Virginia:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown65198Weather
March2018-03-023:46 PM03/04/20187:46 PMNew York: New York County, Westchester County;NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown72353Weather
March2018-03-027:00 AMUnknownUnknownNew York: Dutchess County, Orange County, Greene County, Ulster County, Putnam County, Sullivan County, Albany County, Columbia County;NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown90000Weather
March2018-03-0211:58 AMUnknownUnknownPennsylvania: Berks County, Bucks County, Carbon County, Chester County, Clinton County, Columbia County, Cumberland County, Dauphin County, Juniata County, Lackawanna County, Lancaster County, Lebanon County, Lehigh County, Luzerne County, Lycoming County, Monroe County, Montgomery County, Montour County, Northampton County, Northumberland County, Pike County, Schuylkill County, Snyder County;RFElectrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical systemSevere WeatherUnknown126000Weather
March2018-03-021:51 PM03/04/201812:11 PMPennsylvania:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown233136Weather
March2018-03-023:10 PM03/06/20184:57 AMOhio:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown249322Weather
March2018-03-021:51 PM03/05/20181:18 PMConnecticut: Massachusetts: Rhode Island:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown325000Weather
March2018-03-0212:00 PMUnknownUnknownMaryland:RFPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power systemSevere Weather670474019Weather
March2018-03-0212:00 PM03/05/201812:00 AMPennsylvania:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown630000Weather
March2018-03-075:15 PMUnknownUnknownNew Jersey:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather5058000Weather
March2018-03-077:37 PM03/10/20184:35 PMConnecticut: Massachusetts: Maine: New Hampshire: Rhode Island: Vermont:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown102000Weather
March2018-03-0712:00 PM03/07/20185:00 PMPennsylvania:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown120000Weather
March2018-03-074:10 PM03/10/201811:32 AMNew Jersey:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown216800Weather
March2018-03-1212:00 AM04/06/201811:00 AMNew York: Dutchess County;NPCCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
March2018-03-1312:10 AM03/13/201812:34 AMColorado:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSuspicious Activity00Physical Attack
March2018-03-138:50 AM03/14/201811:22 PMMassachusetts: Rhode Island:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown123629Weather
March2018-03-1911:29 PM03/20/20183:37 AMAlabama: Georgia:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather26178220Weather
March2018-03-207:00 PM03/25/20186:30 AMNew Jersey: Atlantic County, Camden County, Cape May County, Gloucester County, Salem County, Cumberland County, Burlington County;RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather80124000Weather
March2018-03-2410:30 PM03/26/20188:00 PMVirginia: West Virginia:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown81227Weather
March2018-03-263:05 AM03/26/20183:35 AMCalifornia:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
March2018-03-283:00 PM03/28/20184:00 PMWashington: Walla Walla County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism121,185Physical Attack
April2018-04-0311:15 AM04/03/201811:30 AMCalifornia:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
April2018-04-044:42 PM04/07/20186:22 AMNew York:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown72896Weather
April2018-04-0512:50 AM04/05/20184:00 PMConnecticut: Maine: Massachusetts: New Hampshire: Rhode Island: Vermont:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown65932Weather
April2018-04-0910:07 AM04/09/20184:00 PMWashington: Walla Walla County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
April2018-04-0911:10 PM04/10/20186:47 AMFlorida: Palm Beach County;FRCCPhysical attack that causes major interruptions or impacts to critical infrastructure facilities or to operationsSabotage5527,000Physical Attack
April2018-04-0912:16 PM04/09/20181:52 PMUtah: Salt Lake County;WECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentTransmission Interruption80657000Transmission Interruption
April2018-04-0911:16 AMUnknownUnknownUtah:WECCUncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incidentTransmission Interruption300250000Transmission Interruption
April2018-04-149:30 AM04/14/201810:00 AMLouisiana: Arkansas: Mississippi: Texas:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown56350Weather
April2018-04-155:14 PM04/15/201811:25 PMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown78100Weather
April2018-04-157:30 AM04/18/20187:30 AMMichigan:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown389591Weather
May2018-05-022:52 PM05/02/20184:14 PMNorth Carolina:SERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
May2018-05-0411:10 PM05/05/201812:40 AMNew Hampshire: Vermont:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown56000Weather
May2018-05-042:00 PM05/05/20189:30 AMMichigan: Calhoun County, Genesee County, Ingham County, Kent County, Macomb County, Midland County, Saginaw County, Gratiot County;RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown90000Weather
May2018-05-048:10 PMUnknownUnknownNew York:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown106150Weather
May2018-05-0412:00 PM05/06/20181:00 PMMichigan:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown300000Weather
May2018-05-054:30 AM05/05/20183:30 PMVermont: New Hampshire: Maine:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown31900Weather
May2018-05-0710:30 AM05/07/201810:36 AMNew York: Tompkins County;NPCCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSuspected Physical Attack00Physical Attack
May2018-05-084:00 PM05/08/20184:01 PMUtah: Washington County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsActual Physical Attack00Physical Attack
May2018-05-147:08 PMUnknownUnknownVirginia:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown112000Weather
May2018-05-153:00 PM05/18/20181:48 PMMassachusetts:NPCCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
May2018-05-155:15 PMUnknownUnknownNew York:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown49999Weather
May2018-05-156:14 PM05/15/20187:00 PMPennsylvania:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown52872Weather
May2018-05-154:00 PMUnknownUnknownNew York: Dutchess County, Ulster County, Orange County;NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown72000Weather
May2018-05-155:25 PMUnknownUnknownNew Jersey:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown82372Weather
May2018-05-152:50 PMUnknownUnknownPennsylvania: Lehigh County, Schuylkill County, Cumberland County, Lancaster County, Northampton County, Berks County, Clinton County, Susquehanna County, Bucks County, Carbon County, Chester County, Columbia County, Juniata County;RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown114000Weather
May2018-05-156:35 PM05/18/20183:57 PMConnecticut: Massachusetts: Rhode Island:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown120000Weather
May2018-05-171:11 AM05/18/201812:38 AMCalifornia:WECCLoss of electric service to more than 50,000 customers for 1 hour or moreTransmission Disruption12470000Transmission Interruption
May2018-05-171:11 AMUnknownUnknownCalifornia: Contra Costa County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather7070000Weather
May2018-05-266:40 PM05/27/201811:50 PMTexas: Harris County;TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown163932Weather
June2018-06-025:00 AM06/02/201811:00 AMMissouri: Jackson County, Clay County, Platte County, Andrew County; Kansas: Johnson County;SPP RELoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown103535Weather
June2018-06-048:50 AM06/04/20182:00 PMFlorida: Alachua County;FRCCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
June2018-06-099:54 AM06/09/201812:12 PMGeorgia:SERCUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or moreSystem Operations00Operations
June2018-06-102:25 PM06/11/20185:58 AMKentucky:SERCUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or moreSystem OperationsUnknownUnknownOperations
June2018-06-123:00 PM06/12/20183:15 PMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
June2018-06-124:15 PMUnknownUnknownNevada: Clark County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
June2018-06-186:20 PM06/19/201812:15 AMConnecticut: Maine: Massachusetts: New Hampshire: Rhode Island: Vermont:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown112927Weather
June2018-06-2010:58 PM06/21/20186:05 AMFlorida: Palm Beach County;FRCCComplete operational failure or shut-down of the transmission and/or distribution of electrical systemTransmission Interruption7327000Transmission Interruption
June2018-06-222:38 PMUnknownUnknownWashington:WECCElectrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical systemSevere Weather100004200000Weather
June2018-06-272:30 PM06/27/20182:33 PMNew York: New York County;NPCCPhysical threat to its Bulk Electric System control center, excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the control center. Or suspicious device or activity at its Bulk Electric System control centerSuspicious Activity00Physical Attack
June2018-06-282:50 PM06/29/20189:00 AMAlabama: Georgia:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather16048109Weather
June2018-06-286:36 PM07/01/20187:00 AMMissouri: Illinois:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown112000Weather
June2018-06-293:38 AMUnknownUnknownKentucky:SERCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or moreSystem OperationsUnknownUnknownOperations
June2018-06-297:35 AM06/29/20189:30 AMMinnesota: St. Louis County;MROUncontrolled loss of 300 Megawatts or more of firm system loads for 15 minutes or more from a single incidentSevere Weather350UnknownWeather
June2018-06-3010:45 AM06/30/201811:28 AMTexas: Travis County, Williamson County;TREComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or moreSystem Operations00Operations
June2018-06-3012:30 PM06/30/201812:31 PMCalifornia: Los Angeles County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
July2018-07-045:54 PM07/04/20187:20 PMTennessee:SERCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
July2018-07-0410:00 PM07/04/201810:30 PMColorado: Pueblo County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.VandalismUnknown5,058Physical Attack
July2018-07-091:10 PM07/09/20182:45 PMCalifornia: Merced County, Kern County; Nevada: Clark County;WECCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
July2018-07-1112:58 AMUnknownUnknownCalifornia:WECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
July2018-07-113:40 PM07/11/20184:00 PMTennessee:SERCUncontrolled loss of 300 Megawatts or more of firm system loads for 15 minutes or more from a single incidentTransmission Interruption42526195Transmission Interruption
July2018-07-1410:20 AMUnknownUnknownOhio:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System OperationsUnknownUnknownOperations
July2018-07-165:15 AMUnknownUnknownCalifornia: Merced County;WECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
July2018-07-184:00 AMUnknownUnknownCalifornia: Fresno County;WECCFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
July2018-07-185:28 PM07/18/20185:31 PMOregon:WECCTotal generation loss, within one minute of: greater than or equal to 2,000 Megawatts in the Eastern or Western Interconnection or greater than or equal to 1,400 Megawatts in the ERCOT Interconnection.Severe Weather/Transmission InterruptionUnknownUnknownWeather
July2018-07-1912:38 PM07/19/20181:22 PMLouisiana: Rapides Parish;SERCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
July2018-07-198:25 PMUnknownUnknownKentucky:SERCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System OperationsUnknownUnknownOperations
July2018-07-2012:46 PM07/20/20181:30 PMMaine: Hancock County;NPCCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.System Operations00Physical Attack
July2018-07-204:19 PM07/20/20184:48 PMKentucky:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown87833Weather
July2018-07-217:20 AM07/21/201811:30 AMGeorgia:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather14342901Weather
July2018-07-214:45 AM07/21/201811:15 AMArkansas:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown64930Weather
July2018-07-234:16 AM07/23/20184:29 AMFlorida: Pinellas County;FRCCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Severe Weather/Transmission Interruption40UnknownWeather
July2018-07-268:24 PMUnknownUnknownCalifornia: Shasta County;WECCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric SystemNatural DisasterUnknownUnknownNatural Disaster
July2018-07-279:34 AM07/27/20189:51 AMWashington: Clark County;WECCElectrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical systemSystem OperationsUnknownUnknownIslanding
July2018-07-274:28 PM07/27/20184:33 PMNew York: New York County;NPCCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Severe Weather/Transmission Interruption00Weather
July2018-07-2811:11 PM07/29/20181:51 AMNevada: Nye County;WECCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
July2018-07-292:33 PM07/29/20186:23 PMCalifornia:WECCLoss of electric service to more than 50,000 customers for 1 hour or moreNatural Disaster8357670Natural Disaster
July2018-07-306:30 AM07/30/201811:00 PMArizona: Maricopa County;WECCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown82000Weather
July2018-07-3111:44 AM07/31/20182:17 PMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Suspicious ActivityUnknownUnknownPhysical Attack
August2018-08-019:11 AM08/01/201810:56 AMMontana:WECCPhysical attack that causes major interruptions or impacts to critical infrastructure or to operations.Vandalism00Physical Attack
August2018-08-048:20 AM08/04/20188:21 AMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.VandalismUnknownUnknownPhysical Attack
August2018-08-071:22 AM08/07/20181:59 AMCalifornia: Butte County;WECCElectrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical system.Natural Disaster5485Natural Disaster
August2018-08-071:22 AM08/07/20187:04 PMCalifornia: Butte County;WECCElectrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical system.Natural Disaster2711383Natural Disaster
August2018-08-149:00 PM08/14/20189:01 PMVirginia: Hanover County;SERCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
August2018-08-1512:00 AM08/15/20181:00 AMMissouri: Boone County;SERCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
August2018-08-171:07 PM08/17/20181:40 PMCalifornia:WECCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
August2018-08-193:20 PM08/19/20183:21 PMUtah: Box Elder County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
August2018-08-2010:46 PM08/21/201812:14 AMLouisiana:SERCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
August2018-08-2412:24 PM08/24/201812:59 PMVirginia: Roanoke County;SERCUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more.System Operations00Operations
August2018-08-2610:00 PM08/27/20184:56 AMMichigan: Muskegon County, Newaygo County, Oceana County, Mason County, Kent County, Mecosta County, Montcalm County, Isabella County, Midland County, Saginaw County;RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown67000Weather
August2018-08-2811:41 PM08/29/201812:13 AMOhio: Montgomery County;RFUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more.System Operations00Operations
August2018-08-288:00 PM08/30/20182:59 PMMichigan: Benzie County, Barry County, Grand Traverse County, Kalkaska County, Mason County, Oceana County, Muskegon County, Kent County, Newaygo County, Montcalm County, Mecosta County, Antrim County, Eaton County, Ionia County, Isabella County, Clare County, Saginaw County;RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown110000Weather
August2018-08-293:27 AM08/29/20184:00 AMMaryland: Montgomery County; District of Columbia:RFPhysical threat to its Bulk Electric System control center, excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the control center. OR suspicious device or activity at its Bulk Electric System control center.Suspicious Activity00Physical Attack
August2018-08-299:00 AM08/29/20189:06 AMArkansas:SERCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
August2018-08-2912:00 AM08/30/201812:00 AMIllinois:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown100000Weather
August2018-08-3012:00 PM08/30/201812:20 PMCalifornia:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
August2018-08-313:07 PM08/31/20183:31 PMOregon:WECCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Natural Disaster/Transmission Interruption9650000Natural Disaster
August2018-08-316:34 PM08/31/20186:40 PMNew York: New York County, Westchester County;NPCCPhysical threat to its Bulk Electric System control center, excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the control center. OR suspicious device or activity at its Bulk Electric System control center.Suspicious Activity00Physical Attack
September2018-09-0112:00 AM09/01/20183:22 PMArkansas:SPP REPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
September2018-09-051:00 PM09/05/20181:01 PMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.VandalismUnknownUnknownPhysical Attack
September2018-09-062:26 AM09/06/20182:27 AMFlorida: Hillsborough County;FRCCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
September2018-09-1210:00 PM09/12/201810:05 PMTexas:TREPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
September2018-09-138:30 PM09/19/20185:00 PMNorth Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather300325000Weather
September2018-09-138:56 PM09/20/20187:00 PMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown1457583Weather
September2018-09-153:00 PM09/15/20186:00 PMMississippi: Forrest County;SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System.System Operations1322420000Public Appeal
September2018-09-153:00 PM09/15/20186:00 PMLouisiana:SERCPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System.System OperationsUnknownUnknownPublic Appeal
September2018-09-151:05 AM09/17/20184:00 PMSouth Carolina: Horry County, Chesterfield County, Dillon County, Georgetown County, Marlboro County, Darlington County;SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown50100Weather
September2018-09-168:00 AM09/18/20187:40 PMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown50000Weather
September2018-09-1911:00 AM09/20/201812:00 PMIndiana: Benton County;RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
September2018-09-2012:39 PMUnknownUnknownNevada: Clark County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
September2018-09-223:23 PM09/22/201811:00 PMCalifornia: Los Angeles County;WECCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Natural Disaster35072500Natural Disaster
September2018-09-2512:33 AM09/25/20183:10 AMIllinois:SERCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
September2018-09-261:54 PM09/26/20185:58 PMTexas: Harris County;TREUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
September2018-09-286:58 PM09/28/20187:29 PMOhio:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
October2018-10-0112:44 PM10/01/20185:32 PMOhio: Indiana: Michigan: Kentucky: West Virginia: Virginia:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System OperationsUnknownUnknownOperations
October2018-10-037:38 AM10/03/20187:48 AMIllinois:SERCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
October2018-10-044:01 PM10/04/20186:25 PMCalifornia:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsSuspicious Activity00Physical Attack
October2018-10-046:00 AM10/04/20188:00 AMOklahoma: Osage County;SPP REPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Vandalism42,089Physical Attack
October2018-10-098:12 PM10/09/20189:12 PMColorado: El Paso County;WECCUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more;
Complete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.
System Operations00Operations
October2018-10-105:41 AM10/10/20187:54 AMMaine:NPCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
October2018-10-105:00 PM10/15/20185:00 AMUtah:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
October2018-10-1011:59 AMUnknownUnknownFlorida: Alabama: Georgia:FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather15245604Weather
October2018-10-104:00 PM10/19/20186:00 AMFlorida:FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather33055000Weather
October2018-10-102:00 PM10/11/20186:00 AMFlorida:FRCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather13560717Weather
October2018-10-117:21 AM10/11/20183:00 PMSouth Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown71654Weather
October2018-10-116:55 PM10/12/201812:00 PMNorth Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown117000Weather
October2018-10-114:42 PM10/12/20189:00 PMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown170222Weather
October2018-10-111:15 PMUnknownUnknownNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown240807Weather
October2018-10-123:36 AM10/12/20181:56 PMMaryland: Garrett County;RFUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
October2018-10-1410:11 PMUnknownUnknownCalifornia:WECCLoss of electric service to more than 50,000 customers for 1 hour or moreNatural DisasterUnknown60000Natural Disaster
October2018-10-164:15 AM10/16/20185:11 PMConnecticut: Rhode Island: Massachusetts: Vermont: New Hampshire: Maine:NPCCLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown18000Weather
October2018-10-2112:16 AM10/21/20184:14 PMWest Virginia:RFLoss of electric service to more than 50,000 customers for 1 hour or moreSevere WeatherUnknown63408Weather
October2018-10-2210:25 AM10/22/201810:31 AMUtah: Salt Lake County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
October2018-10-2412:32 PM10/24/20181:33 PMMichigan: Wayne County;RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
October2018-10-295:00 AM11/07/20187:00 AMCalifornia: Shasta County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
October2018-10-298:39 AMUnknownUnknownMinnesota: Douglas County;MROPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systemsVandalism00Physical Attack
October2018-10-302:02 PM10/30/20182:42 PMMaryland: Baltimore, City of;RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
October2018-10-317:30 PM11/01/20186:55 PMTexas: Harris County;TRELoss of electric service to more than 50,000 customers for 1 hour or moreSevere Weather402140932Weather
November2018-11-029:50 AMUnknownUnknownMinnesota: Douglas County;MROPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
November2018-11-035:53 AM11/03/20185:57 AMIllinois:SERCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
November2018-11-035:20 PM11/04/20182:30 PMConnecticut: Massachusetts: New Hampshire: Vermont: Maine: Rhode Island:NPCCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown62000Weather
November2018-11-069:49 AM11/09/20182:05 PMTennessee:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown61000Weather
November2018-11-087:16 AM11/28/20184:32 PMCalifornia: Butte County;WECCElectrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical systemNatural Disaster/Transmission Interruption3211844Natural Disaster
November2018-11-084:00 PMUnknownUnknownNevada: Carson City, Consolidated Municipality of[19];WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
November2018-11-099:02 AM11/09/201810:23 AMIowa: Muscatine County;MROComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
November2018-11-105:02 PM11/14/20183:00 PMWisconsin:MROFuel supply emergencies that could impact electric power system adequacy or reliabilityFuel Supply Deficiency00Fuel Supply Deficiency
November2018-11-136:19 PM11/13/20187:40 PMArkansas: Oklahoma: Louisiana: Texas:SPP REComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
November2018-11-1510:50 AM11/17/20181:12 PMVirginia: West Virginia:RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown50600Weather
November2018-11-155:28 AM11/15/20188:35 AMIndiana:RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown55000Weather
November2018-11-155:38 AM11/16/20186:00 AMKentucky: Ohio:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown104000Weather
November2018-11-153:23 AM11/15/20185:35 PMKentucky:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown150000Weather
November2018-11-181:10 PMUnknownUnknownNebraska: Holt County;MRODamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism20Physical Attack
November2018-11-2510:30 PM11/28/20188:17 PMIllinois: Will County, DuPage County, Kane County, McHenry County, Winnebago County, Ogle County, DeKalb County, Lee County, Grundy County, Lake County, Cook County, Livingston County, Stephenson County, LaSalle County, Kankakee County, Kendall County, Boone County;SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown313448Weather
November2018-11-278:00 AM11/28/20184:50 PMMaine: New Hampshire: Vermont:NPCCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown32000Weather
December2018-12-014:23 PM12/01/20185:09 PMFlorida: Leon County;FRCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
December2018-12-019:40 AM12/04/20185:17 PMPennsylvania:RFDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
December2018-12-024:17 PM12/02/20188:30 PMMaryland:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
December2018-12-033:15 AM12/03/20183:44 AMTexas:TREUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption16UnknownTransmission Interruption
December2018-12-058:00 AM12/06/20188:00 AMAlabama: Chambers County;SERCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
December2018-12-0512:48 PM12/05/201812:49 PMCalifornia: Los Angeles County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
December2018-12-073:10 AM12/07/20184:35 AMUtah: Weber County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Actual Physical Attack00Physical Attack
December2018-12-0911:28 PM12/10/20181:30 AMVirginia: Loudoun County;SERCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
December2018-12-0912:23 AM12/09/201811:54 AMAlabama: Georgia:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather13741126Weather
December2018-12-093:35 AM12/10/201811:45 PMNorth Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather/Transmission InterruptionUnknown50000Weather
December2018-12-098:41 AM12/09/20186:00 PMNorth Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown70000Weather
December2018-12-119:10 AM12/11/201810:26 AMTexas: Travis County;TREComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
December2018-12-117:00 AM12/13/20182:00 PMOregon: Josephine County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
December2018-12-1210:00 AM12/12/201810:31 AMOregon: Gilliam County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
December2018-12-1310:00 AMUnknownUnknownCalifornia: Stanislaus County, San Joaquin County;WECCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
December2018-12-148:40 AM12/14/201810:00 AMTexas: Jasper County;TREPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
December2018-12-146:00 PMUnknownUnknownWashington: Snohomish County;WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather20060000Weather
December2018-12-144:00 PM12/17/20182:00 AMWashington: King County, Kitsap County, Island County, Pierce County, Thurston County, Whatcom County, Skagit County, Kittitas County;WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown150000Weather
December2018-12-188:47 AM12/18/20188:48 AMUtah: Salt Lake County; California: Oregon:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
December2018-12-209:30 AM12/20/20185:00 PMWashington: Skagit County, Snohomish County, King County, Kitsap County, Island County;WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown165000Weather
December2018-12-261:00 AM01/03/201910:27 AMCalifornia: Kern County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
December2018-12-2712:05 AM12/27/20181:05 AMMaryland: Montgomery County, Prince George's County; District of Columbia:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
December2018-12-2712:50 PM12/27/20181:00 PMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
December2018-12-279:12 PM12/27/20189:16 PMNew York: New York County;NPCCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission InterruptionUnknownUnknownTransmission Interruption
December2018-12-3011:41 AM12/30/20181:20 PMWashington: King County;WECCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
January2019-01-051:19 PM01/05/20193:07 PMWashington:WECCComplete loss of Interpersonal Communication and Alternative Interpersonal Communication capability affecting its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations0UnknownOperations
January2019-01-065:56 PM01/06/20199:52 PMCalifornia: Sacramento County;WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather30090382Weather
January2019-01-061:00 AM01/06/201912:00 PMWashington: King County, Thurston County, Pierce County;WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown230000Weather
January2019-01-063:00 AM01/09/20197:00 AMWashington:WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather230230000Weather
January2019-01-078:57 PM01/07/20199:32 PMMichigan:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
January2019-01-0911:55 AM01/09/201911:56 AMNew Mexico: San Juan County;WECCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
January2019-01-1012:19 PM01/10/201912:48 PMMontana: Valley County;WECCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).System Operations112Operations
January2019-01-1111:36 AM01/11/201912:43 PMMaine:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
January2019-01-127:20 PM01/12/20199:38 PMNew Hampshire:NPCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
January2019-01-1211:30 AM01/13/201910:00 PMMissouri: Jackson County; Kansas: Johnson County;SPP RELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown112530Weather
January2019-01-1211:30 AMUnknownUnknownMissouri: Nebraska:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown116600Weather
January2019-01-135:30 AM01/15/20195:00 PMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather133200UnknownWeather
January2019-01-1411:10 AMUnknownUnknownMichigan:RFPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Actual Physical AttackUnknownUnknownPhysical Attack
January2019-01-158:00 AM01/15/20198:02 AMPennsylvania:RFPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
January2019-01-165:19 AM01/16/20197:14 AMTexas: Nueces County;TREComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
January2019-01-165:26 PM01/17/201912:19 PMCalifornia:WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather190126700Weather
January2019-01-189:54 PM01/19/201912:19 AMNebraska:MROUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption8UnknownTransmission Interruption
January2019-01-237:26 AM01/23/20195:05 PMColorado: Larimer County;WECCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).System Operations00Operations
January2019-01-244:39 AM01/24/20195:16 AMOhio:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
January2019-01-281:35 PM01/28/20191:40 PMUtah: Iron County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Actual Physical Attack00Physical Attack
January2019-01-296:34 PM01/29/20196:36 PMLouisiana: Washington Parish;SERCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission InterruptionUnknownUnknownTransmission Interruption
January2019-01-304:23 AM02/02/20199:00 AMIllinois: Scott County;SERCFuel supply emergencies that could impact electric power system adequacy or reliability.Fuel Supply DeficiencyUnknownUnknownFuel Supply Deficiency
January2019-01-304:30 PMUnknownUnknownWashington:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
January2019-01-307:00 AM01/30/20198:08 AMIllinois: Pike County;SERCFuel supply emergencies that could impact electric power system adequacy or reliability.Severe WeatherUnknownUnknownWeather
January2019-01-309:30 AM01/31/20196:00 PMMichigan:RFPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System.Severe WeatherUnknownUnknownWeather
January2019-01-319:33 PM01/31/20199:34 PMCalifornia:WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
February2019-02-015:35 AM02/01/20196:10 AMMassachusettsNPCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
February2019-02-0111:57 PM02/02/20198:49 AMNevadaWECCDamage or destruction of its Facility that results from actual or suspected intentional human action.VandalismUnknown1Physical Attack
February2019-02-0210:28 AM02/02/201910:29 AMCaliforniaWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
February2019-02-056:17 PM02/05/20198:26 PMCaliforniaWECCElectrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical system.Severe Weather4233200Weather
February2019-02-077:39 AM02/07/20197:40 AMArkansasSERCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Severe Weather/Transmission Interruption33370Weather
February2019-02-078:55 AM02/09/20194:30 PMMichiganRFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown233000Weather
February2019-02-0810:00 AM02/08/201910:30 AMPennsylvaniaRFPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Vandalism00Physical Attack
February2019-02-086:30 PMUnknownUnknownWashingtonWECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown50940Weather
February2019-02-132:48 AM02/15/201912:28 AMCaliforniaWECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather182121000Weather
February2019-02-148:50 AM02/14/201912:10 PMNew JerseyRFPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Vandalism00Physical Attack
February2019-02-1412:15 PM02/14/201912:16 PMUtahWECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
February2019-02-199:45 AMUnknownUnknownTexasTREDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
February2019-02-2012:50 PM02/20/20191:32 PMWisconsin, Minnesota, Iowa, IllinoisMROComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations7400Operations
February2019-02-232:05 PMUnknownUnknownVirginiaSERCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Severe Weather/Transmission InterruptionUnknownUnknownWeather
February2019-02-242:33 PM02/24/20196:03 PMPennsylvaniaRFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown94048Weather
February2019-02-248:02 PM02/25/20192:30 PMMichiganRFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown115000Weather
February2019-02-2411:21 AM02/26/20195:29 PMOhio, Virginia, West VirginiaRFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown118781Weather
February2019-02-246:00 PM02/25/201910:00 PMPennsylvaniaRFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown132000Weather
February2019-02-246:47 PM02/25/20191:55 PMPennsylvaniaRFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown137216Weather
February2019-02-2412:31 PM02/24/20192:57 PMOhioRFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown157274Weather
February2019-02-257:45 AM02/25/20196:40 PMMassachusettsNPCCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
February2019-02-251:35 PM02/26/20192:50 AMConnecticut, Massachusetts, New Hampshire, Maine, Vermont, Rhode IslandNPCCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown72332Weather
February2019-02-279:35 PM02/27/20199:45 PMSouth CarolinaSERCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
February2019-02-2711:25 AM02/27/20195:39 PMIowaMROUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
February2019-02-287:02 AM02/28/20197:33 AMOklahoma, Arkansas, LouisianaSPP REComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
March2019-03-0411:39 AM03/08/20194:52 PMOklahoma:SPP REDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
March2019-03-059:12 AM03/05/20196:57 PMCalifornia: Kern County, Los Angeles County; Utah: Salt Lake County; Wyoming: Converse County;WECCCyber event that causes interruptions of electrical system operations.System Operations00Cyber Attack
March2019-03-136:12 AM03/13/20196:13 AMCalifornia: Los Angeles County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
March2019-03-133:51 PM03/16/20196:00 PMTexas:TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather/Transmission Interruption5054290Weather
March2019-03-1311:29 AM03/14/20199:11 PMColorado: Jefferson County;WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather5858379Weather
March2019-03-133:00 PM03/14/201912:00 AMTexas: Kansas: Oklahoma:TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather/Transmission InterruptionUnknown66000Weather
March2019-03-135:50 AM03/13/201910:30 AMTexas: Midland County, Ector County, Tarrant County, Dallas County, Wichita County, Brown County;TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown154124Weather
March2019-03-1910:53 PM03/19/201910:54 PMOklahoma:SPP REDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
March2019-03-2110:00 AM03/21/201910:05 AMUtah: Salt Lake County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
March2019-03-257:47 AM03/25/20197:48 AMOregon: Lane County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Actual Physical Attack5UnknownPhysical Attack
March2019-03-2911:36 PM03/30/20192:00 AMCalifornia: San Diego County, Los Angeles County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Suspicious Activity00Physical Attack
April2019-04-016:51 AM04/01/20197:53 AMNew York: Broome County;NPCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
April2019-04-016:51 AM04/01/20197:53 AMNew York: Monroe County;NPCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
April2019-04-012:15 PM04/06/20195:20 PMNevada: Carson City, Consolidated Municipality of[19], Washoe County, Churchill County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Actual Physical Attack00Physical Attack
April2019-04-028:33 AM04/02/20199:00 AMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
April2019-04-0210:15 AM04/02/201910:16 AMUtah: Salt Lake County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
April2019-04-035:15 AM04/03/201912:39 PMCalifornia: Fresno County;WECCFuel supply emergencies that could impact electric power system adequacy or reliability.Fuel Supply Deficiency00Fuel Supply Deficiency
April2019-04-0410:13 AM04/04/201912:08 PMMontana:WECCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
April2019-04-071:46 PM04/08/20195:50 PMTexas:TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather537231956Weather
April2019-04-1011:59 AM04/10/201912:00 PMVirginia:SERCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
April2019-04-117:48 PM04/11/20198:00 PMOregon: Washington:WECCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
April2019-04-1211:20 AM04/12/201912:46 PMMinnesota: Martin County;MROUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
April2019-04-136:15 PM04/13/201911:15 PMMississippi: Arkansas: Texas: Louisiana:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown60467Weather
April2019-04-1510:00 AM04/15/20192:00 PMMinnesota:MRODamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
April2019-04-154:35 AM04/15/20192:40 PMVirginia:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown75290Weather
April2019-04-1610:30 AM04/16/201911:00 AMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
April2019-04-177:38 PM04/17/201911:52 PMArizona:WECCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
April2019-04-188:08 PM04/19/201911:00 AMColorado: Clear Creek County;WECCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
April2019-04-187:55 PM04/19/20195:29 PMAlabama: Mississippi: Georgia: Florida:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather11634695Weather
April2019-04-2110:40 AM04/21/201910:45 AMUtah: Salt Lake County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
April2019-04-256:03 PM04/25/20196:32 PMArizona: Maricopa County;WECCFirm load shedding of 100 Megawatts or more implemented under emergency operational policy.Generation Inadequacy15051366Generation Interruption
April2019-04-261:00 AM04/26/20191:27 PMPennsylvania:RFUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption75830Transmission Interruption
April2019-04-263:16 PM04/26/20193:17 PMMassachusetts: Hampden County[13];NPCCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Severe Weather/Transmission Interruption00Weather
April2019-04-265:46 PM04/27/201911:49 AMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown54071Weather
April2019-04-281:40 PM04/28/20192:49 PMSouth Carolina:SERCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
April2019-04-2810:43 AM04/29/20192:06 AMOhio:RFUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
April2019-04-295:17 PM04/30/20199:22 AMVirginia: Surry County;SERCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
April2019-04-3012:25 PM04/30/20191:11 PMIndiana:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
May2019-05-089:22 AM05/08/20199:56 AMPennsylvania: Mercer County;RFUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption291Transmission Interruption
May2019-05-083:50 PM05/13/201912:00 AMLouisiana: Texas:SPP RELoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather/Distribution InterruptionUnknown65844Weather
May2019-05-097:06 PM05/10/20192:57 AMTexas: Harris County;TREUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Severe Weather/Transmission Interruption00Weather
May2019-05-095:55 PM05/11/20198:50 PMTexas: Harris County;TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather691238015Weather
May2019-05-102:00 AM05/10/201912:15 PMTexas:TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown61008Weather
May2019-05-112:08 PM05/11/20193:00 PMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
May2019-05-1512:10 PM05/15/201912:11 PMWest Virginia:RFPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious ActivityUnknownUnknownPhysical Attack
May2019-05-181:55 AM05/18/20193:06 PMColorado: Wyoming: Nebraska: Utah: Daggett County; New Mexico:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism300Physical Attack
May2019-05-183:45 PM05/20/20194:00 AMTexas: Ector County, Midland County, Tarrant County, Dallas County, Stephens County, Anderson County, McLennan County, Ellis County, Hunt County, Young County, Bell County, Limestone County, Collin County, Rockwall County, Henderson County, Parker County, Falls County, Freestone County, Kaufman County, Grayson County, Smith County;TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown68000Weather
May2019-05-231:11 AM05/23/201912:00 PMIndiana:RFUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Severe Weather/Transmission Interruption00Weather
May2019-05-234:55 PM05/23/201911:40 PMVirginia:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown100000Weather
May2019-05-247:28 AM05/24/20198:30 AMKentucky: Shelby County;SERCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
May2019-05-248:09 PM05/25/20192:23 PMNorth Dakota: Minnesota:MROComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
May2019-05-249:47 PM05/24/201911:58 PMCalifornia:WECCElectrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical systemSevere Weather2010961Weather
May2019-05-2710:07 PM05/28/20193:00 AMOhio: Montgomery County, Darke County, Mercer County, Miami County, Greene County;RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather/Transmission Interruption34770000Weather
June2019-06-026:19 PM06/02/20198:43 PMCalifornia:WECCElectrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical system.Severe Weather/Transmission InterruptionUnknownUnknownWeather
June2019-06-0410:15 AM06/04/20191:15 PMNevada: Washoe County;WECCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
June2019-06-058:37 AM06/05/20198:40 AMIdaho: Bannock County;WECCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Vandalism00Physical Attack
June2019-06-0510:16 AM06/05/201910:17 AMSouth Dakota: Lincoln County;MRODamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
June2019-06-059:46 AM06/05/201912:00 PMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
June2019-06-066:09 PM06/06/20196:35 PMTexas: Bexar County;TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown55017Weather
June2019-06-072:43 PM06/07/20194:20 PMTexas: Pecos County;TREUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption81Transmission Interruption
June2019-06-083:50 PM06/08/20197:40 PMTexas: Potter County;TREUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
June2019-06-092:45 PM06/13/201910:30 PMTexas: Collin County, Dallas County, Denton County, Palo Pinto County, Tarrant County, Ellis County, Williamson County;TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown558000Weather
June2019-06-113:11 PM06/11/20195:00 PMNorth Dakota: Mountrail County, Williams County;MRODamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
June2019-06-117:52 AM06/11/20197:53 AMUtah:WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
June2019-06-122:56 PM06/12/20193:50 PMCalifornia: Imperial County, Riverside County;WECCFirm load shedding of 100 Megawatts or more implemented under emergency operational policy.Generation Inadequacy98230907Generation Interruption
June2019-06-162:00 AM06/17/201911:59 PMTexas: Dallas County, Tarrant County, Collin County, Denton County;TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown340000Weather
June2019-06-163:25 AMUnknownUnknownOklahoma:SPP REUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Severe Weather/Transmission InterruptionUnknownUnknownWeather
June2019-06-186:21 AM06/18/20196:40 AMWashington: Grant County;WECCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
June2019-06-193:00 PMUnknownUnknownNevada: Clark County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
June2019-06-1911:00 AM06/19/201911:01 AMOklahoma:SPP REDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
June2019-06-1910:30 PM06/20/20197:00 PMArkansas:SPP RELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown82045Weather
June2019-06-204:11 PM06/21/201912:45 PMVirginia:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown60000Weather
June2019-06-216:36 PM06/21/20197:27 PMMaine:NPCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
June2019-06-2110:00 AM06/21/201911:00 AMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
June2019-06-217:15 PMUnknownUnknownKentucky: Tennessee:SERCElectrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical system.Severe WeatherUnknown50000Weather
June2019-06-228:46 PM06/23/201912:30 AMAlabama: Georgia:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather11534637Weather
June2019-06-235:13 AM06/23/201910:58 AMArkansas:SPP REUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption4716199Transmission Interruption
June2019-06-2310:00 PM06/25/201911:00 PMTexas: Dallas County, Denton County, Ellis County, Collin County, Ellis County, Hood County, Johnson County, Kaufman County;TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown265000Weather
June2019-06-249:40 AM06/24/20193:17 PMOklahoma: Oklahoma County;SPP REUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more.System Operations00Operations
June2019-06-245:30 AM06/24/20198:45 AMArkansas:SPP RELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown56451Weather
June2019-06-261:58 PM06/26/20192:03 PMNorth Dakota: Williams County;MROUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption530Transmission Interruption
June2019-06-282:25 PMUnknownUnknownIdaho: Nez Perce County;WECCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
June2019-06-303:15 PM06/30/20194:15 PMNew York: Nassau County, Suffolk County;NPCCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather318952498Weather
June2019-06-303:30 PM06/30/20198:30 PMIllinois: Cook County, DeKalb County, DuPage County, Grundy County, Iroquois County, Ford County, Lake County, Kendall County, Kankakee County, Kane County, Ogle County;SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown100000Weather
July2019-07-021:00 PM07/02/20191:22 PMIdaho: Ada County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
July2019-07-0610:00 PM07/07/20191:57 PMMississippi: Panola County;SERCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.VandalismUnknown3,000Physical Attack
July2019-07-091:59 AM07/09/20193:50 PMTexas: Louisiana: Arkansas: Mississippi:SPP REDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
July2019-07-1012:00 PM07/10/201912:15 PMUtah: Salt Lake County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
July2019-07-1012:10 PM07/12/201912:30 PMTexas: Collin County, Dallas County, Denton County, Hood County, Johnson County, Tarrant County;TRELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown57000Weather
July2019-07-1111:08 AM07/11/201911:13 AMTexas: Lynn County;TREUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption262043Transmission Interruption
July2019-07-136:47 PM07/13/201911:37 PMNew York: New York County;NPCCUncontrolled loss of 300 Megawatts or more of firm system loads for 15 minutes or more from a single incidentTransmission Interruption45272669Transmission Interruption
July2019-07-137:15 AM07/14/20195:00 PMLouisiana:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown55730Weather
July2019-07-1311:55 PM07/14/20191:00 PMLouisiana: Acadia Parish, Avoyelles Parish, Catahoula Parish, Evangeline Parish, Grant Parish, Iberia Parish, LaSalle Parish, Natchitoches Parish, Rapides Parish, Sabine Parish, St. Landry Parish, St. Martin Parish, St. Mary Parish, St. Tammany Parish, Allen Parish, Beauregard Parish, Calcasieu Parish, Vermilion Parish, De Soto Parish, Jefferson Davis Parish, Red River Parish, Tangipahoa Parish, Vernon Parish, Washington Parish;SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown63000Weather
July2019-07-172:12 PM07/17/20192:30 PMOklahoma: Oklahoma County;SPP REPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
July2019-07-199:55 AM07/19/20191:00 PMWisconsin: Dane County;MROUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more.System OperationsUnknownUnknownOperations
July2019-07-197:00 PM07/21/20198:00 PMMichigan:RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown400000Weather
July2019-07-207:37 AM07/20/20199:20 AMMissouri: Boone County;SERCPhysical threat to its Bulk Electric System control center, excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the control center. Or suspicious device or activity at its Bulk Electric System control center.Suspicious Activity00Physical Attack
July2019-07-2011:55 AM07/23/201912:00 AMWisconsin: Michigan:RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather20050000Weather
July2019-07-203:00 AM07/22/20197:00 AMMichigan: Kent County, Newaygo County, Mecosta County, Montcalm County, Isabella County, Ionia County, Allegan County, Barry County;RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown160000Weather
July2019-07-2111:00 PM07/22/20198:54 PMNew York: Kings County, New York County, Queens County, Bronx County, Westchester County, Richmond County;NPCCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather6045000Weather
July2019-07-225:50 PM07/25/20191:15 PMNew Jersey: Gloucester County;RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather4995600Weather
July2019-07-224:00 PM07/24/201911:00 PMPennsylvania: Bucks County, Delaware County;RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown165000Weather
July2019-07-233:22 AM07/23/20195:40 AMCalifornia: Santa Cruz County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.VandalismUnknown25Physical Attack
July2019-07-2311:55 PM07/23/201911:56 PMNebraska:MROUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
July2019-07-2311:55 PM07/24/20195:22 AMNebraska: Scotts Bluff County;MROUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
July2019-07-233:39 PM07/23/20197:00 PMMassachusetts:NPCCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather5454535Weather
July2019-07-248:01 AM07/24/201912:49 PMMaine:NPCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
July2019-07-241:30 PM07/24/20191:31 PMUtah: Iron County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.VandalismUnknown1Physical Attack
July2019-07-286:48 PM07/28/20197:18 PMMichigan:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
July2019-07-308:45 AM07/30/20199:45 AMLouisiana:SERCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Severe Weather/Transmission InterruptionUnknown13720Weather
August2019-08-026:24 PM08/02/20197:28 PMWashington: Clark County;WECCUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more.System Operations00Operations
August2019-08-021:49 AM08/02/20191:55 AMMinnesota: Chisago County;MROUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
August2019-08-055:23 PM08/06/201912:02 AMOregon: Umatilla County;WECCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption66UnknownTransmission Interruption
August2019-08-079:30 AM08/07/201911:15 AMMaine:NPCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
August2019-08-073:00 PM08/07/20193:30 PMCalifornia: Kern County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
August2019-08-078:40 AMUnknownUnknownWashington: Pierce County;WECCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Vandalism00Physical Attack
August2019-08-084:16 PM08/08/201910:41 PMOhio:RFUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Severe Weather/Transmission InterruptionUnknown5600Weather
August2019-08-099:53 AM08/09/201910:46 AMTexas: Travis County;TREPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
August2019-08-104:11 PM08/10/20194:46 PMMichigan:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
August2019-08-107:59 PM08/10/20199:04 PMMichigan:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
August2019-08-1310:00 AM08/13/201911:00 AMCalifornia: Placer County;WECCUncontrolled loss of 300 Megawatts or more of firm system loads for 15 minutes or more from a single incident.Vandalism00Physical Attack
August2019-08-1312:00 AMUnknownUnknownNorth Dakota: Mercer County;MRODamage or destruction of its Facility that results from actual or suspected intentional human action.VandalismUnknownUnknownPhysical Attack
August2019-08-133:10 PM08/13/20195:30 PMTexas: Williamson County;TREPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System.Severe WeatherUnknownUnknownWeather
August2019-08-1511:03 PM08/16/201912:37 AMCalifornia: Marin County;WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Distribution Interruption8061318Distribution Interruption
August2019-08-158:30 AMUnknownUnknownNew York: Tompkins County;NPCCFuel supply emergencies that could impact electric power system adequacy or reliability.Fuel Supply Deficiency150UnknownFuel Supply Deficiency
August2019-08-153:07 AM08/15/20193:56 AMDistrict of Columbia: Maryland:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
August2019-08-1511:00 AM08/15/20193:30 PMKentucky: Ohio County;SERCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
August2019-08-153:11 PM08/15/20196:00 PMTexas:TREPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System.Severe WeatherUnknownUnknownWeather
August2019-08-184:47 PM08/18/201811:00 PMTexas:TREUncontrolled loss of 300 Megawatts or more of firm system loads for 15 minutes or more from a single incidentDistribution Interruption75286373Distribution Interruption
August2019-08-184:30 PM08/18/201910:00 PMTexas:TRELoss of electric service to more than 50,000 customers for 1 hour or more.Transmission Interruption/Distribution Interruption25961000Transmission Interruption
August2019-08-183:59 PM08/18/201911:00 PMLouisiana: Texas:SPP REFirm load shedding of 100 Megawatts or more implemented under emergency operational policy.Transmission Interruption27186373Transmission Interruption
August2019-08-213:30 PMUnknownUnknownMassachusetts: Middlesex County[13];NPCCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Vandalism00Physical Attack
August2019-08-217:56 AMUnknownUnknownOhio:RFDamage or destruction of its Facility that results from actual or suspected intentional human action.VandalismUnknown1,397Physical Attack
August2019-08-244:10 PM08/24/20197:28 PMWashington:WECCCyber event that could potentially impact electric power system adequacy or reliability.Suspicious Activity00Cyber Attack
August2019-08-251:44 AM08/25/20192:20 AMWashington: King County;WECCPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
August2019-08-269:09 AM08/26/20191:34 PMNorth Dakota:MROUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
August2019-08-267:00 PM08/27/20193:00 AMOklahoma:SPP RELoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather/Transmission InterruptionUnknown95000Weather
August2019-08-267:00 PM08/29/20191:00 PMOklahoma:SPP RELoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown103779Weather
August2019-08-2911:30 PM08/30/20195:30 PMMichigan:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
August2019-08-313:05 PM08/31/20193:46 PMPennsylvania: New Jersey:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
August2019-08-314:00 PM09/02/20196:00 AMCalifornia: Calaveras County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
September2019-09-0411:13 AM09/04/201911:57 AMMaryland: District of Columbia:RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
September2019-09-042:30 PM09/06/20196:00 PMTexas:TREPublic appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System.Severe WeatherUnknownUnknownWeather
September2019-09-0510:08 AM09/05/201912:08 PMMaine:NPCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
September2019-09-0510:00 PM09/06/201912:00 PMNorth Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather32000Weather
September2019-09-0510:36 PM09/06/20194:00 PMNorth Carolina: South Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown116000Weather
September2019-09-054:15 AM09/05/20193:17 PMSouth Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown172278Weather
September2019-09-068:20 AMUnknownUnknownNorth Carolina:SERCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown77000Weather
September2019-09-109:22 PM09/10/20199:23 PMWyoming: Sweetwater County;WECCUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption8850Transmission Interruption
September2019-09-1110:35 PM09/11/201911:59 PMMichigan: Ionia County, Kent County, Barry County, Montcalm County, Allegan County, Ottawa County, Newaygo County;RFLoss of electric service to more than 50,000 customers for 1 hour or more.Severe WeatherUnknown54000Weather
September2019-09-132:31 AM09/16/20195:00 PMTennessee:SERCUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more.System Operations00Operations
September2019-09-195:55 AM09/19/20192:30 PMArizona: Pima County;WECCFuel supply emergencies that could impact electric power system adequacy or reliability.Fuel Supply Deficiency00Fuel Supply Deficiency
September2019-09-196:40 PM09/19/20196:46 PMMinnesota: Washington County;MROPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Vandalism00Physical Attack
September2019-09-2012:21 AM09/20/201912:04 PMOklahoma: Oklahoma County;SPP REUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more.System Operations00Operations
September2019-09-243:56 PM09/26/20197:25 PMWashington: King County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
September2019-09-255:25 PM09/25/20196:16 PMWisconsin: Marathon County;MROPhysical threat to its Facility excluding weather or natural disaster related threats, which has the potential to degrade the normal operation of the Facility. Or suspicious device or activity at its Facility.Suspicious Activity00Physical Attack
September2019-09-259:59 AM09/25/201910:00 AMTexas:TREDamage or destruction of its Facility that results from actual or suspected intentional human action.VandalismUnknownUnknownPhysical Attack
September2019-09-253:47 AM09/25/20193:40 PMCalifornia: Napa County, Nevada County, Placer County, Plumas County, Sonoma County, Butte County, Yuba County;WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather2569524Weather
September2019-09-262:31 PM09/26/20193:14 PMMaryland: Baltimore County;RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
September2019-09-297:38 AMUnknownUnknownCalifornia: Alameda County;WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Distribution InterruptionUnknown50072Distribution Interruption
September2019-09-305:35 AM09/30/20198:10 AMWashington: King County;WECCUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more.System Operations00Operations
September2019-09-3012:17 PM09/30/201912:58 PMNevada: Clark County;WECCPhysical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems.Actual Physical Attack37360Physical Attack
September2019-09-3010:53 AM09/30/201910:54 AMIdaho: Bonneville County;WECCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
October2019-10-0312:13 AM10/03/20194:00 AMMissouri: Reynolds County;SERCDamage or destruction of its Facility that results from actual or suspected intentional human action.Vandalism00Physical Attack
October2019-10-045:15 AMUnknownUnknownCalifornia:WECCFuel supply emergencies that could impact electric power system adequacy or reliability.Fuel Supply Deficiency00Fuel Supply Deficiency
October2019-10-065:15 AMUnknownUnknownCalifornia:WECCFuel supply emergencies that could impact electric power system adequacy or reliability.Fuel Supply Deficiency00Fuel Supply Deficiency
October2019-10-062:50 PM10/06/20193:00 PMTexas: Hidalgo County, Cameron County;TREUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission InterruptionUnknownUnknownTransmission Interruption
October2019-10-0912:27 AMUnknownUnknownCalifornia:WECCLoss of electric service to more than 50,000 customers for 1 hour or more.Severe Weather/Transmission Interruption2400737808Weather
October2019-10-102:06 AM10/10/20195:05 AMMaine:NPCCComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
October2019-10-1012:22 AM10/10/20192:12 AMColorado: Jefferson County;WECCUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more.System Operations00Operations
October2019-10-1110:56 AM10/11/201911:46 AMMichigan: Wayne County;RFComplete loss of monitoring or control capability at its staffed Bulk Electric System control center for 30 continuous minutes or more.System Operations00Operations
October2019-10-123:00 PM10/12/20194:21 PMTexas:TREUnexpected Transmission loss within its area, contrary to design, of three or more Bulk Electric System Facilities caused by a common disturbance (excluding successful automatic reclosing).Transmission Interruption00Transmission Interruption
October2019-10-157:57 PM10/15/20198:44 PMKansas: Shawnee County;SPP REUnplanned evacuation from its Bulk Electric System control center facility for 30 continuous minutes or more.System Operations00