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Electric Power Monthly

Data for August 2020 Release Date: October 26, 2020 Next Release Date: November 24, 2020 full reportPDF
SAS Output
Table B.1 Major Disturbances and Unusual Occurrences, Year-to-Date 2020

Year Month Event Date and Time Restoration Date and Time Duration Utility/Power Pool NERC Region Area Affected Type of Disturbance Loss (megawatts) Number of Customers Affected
2020 1 01/09/2020 11:07 PM 01/09/2020 11:18 PM 0 Hours, 11 Minutes Entergy Transmission Control Center - South SPP RE Arkansas: Electrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical system.-System Operations Unknown Unknown
2020 1 01/09/2020 11:07 PM 01/09/2020 11:19 PM 0 Hours, 12 Minutes Entergy - Transmission Operations Engineering SPP RE Arkansas: Yell County; Unexpected 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 Interruption 0 0
2020 1 01/11/2020 2:25 AM 01/11/2020 7:56 AM 5 Hours, 31 Minutes Entergy - Transmission Operations Engineering SPP RE Arkansas: Cross County; Unexpected 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 Interruption 22 7541
2020 1 01/11/2020 3:30 AM 01/11/2020 5:30 PM 14 Hours, 0 Minutes Entergy Corp SPP RE Arkansas: Texas: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 68138
2020 1 01/11/2020 12:50 PM 01/12/2020 1:33 PM 24 Hours, 43 Minutes Southern Company SERC Alabama: Georgia: Mississippi: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 219 30715
2020 1 01/11/2020 1:20 PM . . . Hours, . Minutes Tennessee Valley Authority SERC Tennessee: Electrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical system.-Severe Weather 4 Unknown
2020 1 01/11/2020 11:02 PM 01/12/2020 2:01 AM 2 Hours, 59 Minutes Duke Energy Carolinas SERC North Carolina: South Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 66475
2020 1 01/17/2020 5:28 AM 01/17/2020 10:13 AM 4 Hours, 45 Minutes Pacific Gas & Electric Co WECC California: Humboldt County; Electrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical system.-Severe Weather/Transmission Interruption 87 67864
2020 1 01/24/2020 4:34 AM . . . Hours, . Minutes California Department of Water Resources WECC California: Fuel supply emergencies that could impact electric power system adequacy or reliability.-Fuel Supply Deficiency 0 0
2020 1 01/30/2020 3:01 AM 01/30/2020 4:36 AM 1 Hours, 35 Minutes Western Area Power Administration - Upper Great Plains Region MRO North Dakota: Burleigh County; Unexpected 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 Interruption 75 0
2020 2 02/06/2020 1:30 PM 02/07/2020 8:08 PM 30 Hours, 38 Minutes Duke Energy Carolinas SERC North Carolina: South Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather/Transmission Interruption Unknown 89500
2020 2 02/06/2020 2:29 PM 02/07/2020 12:44 PM 22 Hours, 15 Minutes Duke Energy Progress SERC North Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather/Distribution Interruption Unknown 284256
2020 2 02/07/2020 8:48 AM . . . Hours, . Minutes Dominion Energy VA SERC Virginia: North Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 87000
2020 2 02/07/2020 11:00 AM . . . Hours, . Minutes Exelon Corporation/PECO RF Pennsylvania: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather/Distribution Interruption Unknown 52000
2020 2 02/07/2020 2:42 PM 02/10/2020 9:25 AM 66 Hours, 43 Minutes Niagara Mohawk Power Corporation (dba National Grid) NPCC New York: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 7500
2020 2 02/07/2020 4:25 PM 02/08/2020 12:00 PM 19 Hours, 35 Minutes ISO New England NPCC Connecticut: Maine: Massachusetts: New Hampshire: Rhode Island: Vermont: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 123359
2020 2 02/09/2020 9:30 AM 02/09/2020 9:40 PM 12 Hours, 10 Minutes Pacific Gas & Electric Co WECC California: Alameda County, Contra Costa County, El Dorado County, Nevada County, Placer County, Sierra County, Santa Clara County, Napa County, Marin County, Santa Cruz County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 500 145000
2020 2 02/11/2020 7:13 AM 02/11/2020 4:00 PM 8 Hours, 47 Minutes Portland General Electric Co WECC Oregon: Clackamas County; Unexpected 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 Interruption Unknown 0
2020 2 02/17/2020 4:00 AM . . . Hours, . Minutes Pacific Gas & Electric Co WECC Northern and Central California; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 91 70000
2020 3 03/01/2020 8:00 AM . . . Hours, . Minutes Somerset Operating Company NPCC Western NY Fuel supply emergencies that could impact electric power system adequacy or reliability.-Fuel Supply Deficiency 675 Unknown
2020 3 03/01/2020 11:27 AM 03/01/2020 9:47 PM 10 Hours, 20 Minutes Entergy - Transmission Operations Engineering SERC Mississippi: Rankin County; Unexpected 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 Interruption 19 3136
2020 3 03/12/2020 1:03 AM 03/12/2020 3:00 AM 1 Hours, 57 Minutes PECO Energy Co RF Pennsylvania: Unexpected 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 Interruption 40 15864
2020 3 03/16/2020 12:01 PM 03/16/2020 1:10 PM 1 Hours, 9 Minutes Pacific Gas & Electric Co WECC California: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 165 110800
2020 3 03/18/2020 7:09 AM . . . Hours, . Minutes Pacificorp WECC Utah: Loss of electric service to more than 50,000 customers for 1 hour or more.-Natural Disaster 237 73000
2020 3 03/24/2020 2:55 AM 03/24/2020 6:50 AM 3 Hours, 55 Minutes ISO New England NPCC Connecticut: Massachusetts: Maine: New Hampshire: Rhode Island: Vermont: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 51026
2020 3 03/26/2020 9:29 PM 03/26/2020 9:47 PM 0 Hours, 18 Minutes FirstEnergy Corp RF Ohio: Unexpected 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 Interruption 19 11964
2020 3 03/29/2020 8:27 PM 03/29/2020 11:04 PM 2 Hours, 37 Minutes Entergy - Transmission Operations Engineering SERC Mississippi: Panola County; Unexpected 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 Interruption 4 1558
2020 3 03/31/2020 11:45 AM 03/31/2020 8:00 PM 8 Hours, 15 Minutes Southern Company SERC Alabama: Georgia: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 412 57744
2020 4 04/02/2020 1:37 PM 04/02/2020 2:43 PM 1 Hours, 6 Minutes Nebraska Public Power District MRO Nebraska: York County; Unexpected 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 Interruption 5 Unknown
2020 4 04/05/2020 3:46 PM 04/05/2020 5:35 PM 1 Hours, 49 Minutes Pacific Gas & Electric Co WECC California: Stanislaus County; Electrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical system.-Severe Weather 7 6814
2020 4 04/07/2020 11:39 PM 04/07/2020 11:46 PM 0 Hours, 7 Minutes Bonneville Power Administration WECC Washington: Unexpected 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 Interruption 0 0
2020 4 04/08/2020 1:21 AM 04/08/2020 3:56 AM 2 Hours, 35 Minutes Ohio Edison Co WECC Ohio: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 82509
2020 4 04/08/2020 9:57 PM 04/09/2020 8:59 AM 11 Hours, 2 Minutes Duke Energy Midwest RF Ohio: Kentucky: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 78314
2020 4 04/08/2020 10:03 PM 04/09/2020 7:36 AM 9 Hours, 33 Minutes Duke Energy Midwest RF Indiana: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 93000
2020 4 04/09/2020 7:25 PM 04/10/2020 3:30 AM 8 Hours, 5 Minutes CenterPoint Energy TRE Texas: Harris County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 95000
2020 4 04/09/2020 7:40 PM 04/11/2020 10:00 PM 50 Hours, 20 Minutes ISO New England NPCC Maine: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 340000
2020 4 04/11/2020 11:24 AM 04/11/2020 11:42 AM 0 Hours, 18 Minutes Pacificorp WECC Wyoming: Unexpected 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 Interruption 0 0
2020 4 04/12/2020 5:00 PM 04/14/2020 1:25 AM 32 Hours, 25 Minutes Southern Company SERC Mississippi: Alabama: Georgia: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 448 62828
2020 4 04/12/2020 6:13 PM 04/13/2020 3:23 PM 21 Hours, 10 Minutes American Electric Power - (SPP Reliability Region) TRE Texas: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 63289
2020 4 04/12/2020 8:30 PM 04/14/2020 9:00 AM 36 Hours, 30 Minutes Arkansas Electric Coop Corp SPP RE Arkansas: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 51000
2020 4 04/12/2020 8:45 PM . . . Hours, . Minutes Entergy Corp SPP RE Arkansas: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 95318
2020 4 04/12/2020 9:28 PM 04/15/2020 12:00 PM 62 Hours, 32 Minutes American Electric Power - (RFC Reliability Region) RF Virginia: West Virginia: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 104000
2020 4 04/13/2020 12:45 AM 04/13/2020 3:00 AM 2 Hours, 15 Minutes Tennessee Valley Authority SERC Tennessee: Hamilton County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 120000
2020 4 04/13/2020 3:30 AM 04/14/2020 6:18 PM 38 Hours, 48 Minutes Duke Energy Carolinas SERC North Carolina: South Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 216400
2020 4 04/13/2020 7:31 AM 04/13/2020 2:00 PM 6 Hours, 29 Minutes Duke Energy Progress SERC North Carolina: South Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown Unknown
2020 4 04/13/2020 8:08 AM . . . Hours, . Minutes Dominion Energy South Carolina SERC South Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 72233
2020 4 04/13/2020 10:25 AM 04/13/2020 6:55 PM 8 Hours, 30 Minutes Dominion Energy VA SERC North Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 95000
2020 4 04/13/2020 1:05 PM 04/14/2020 4:00 PM 26 Hours, 55 Minutes ISO New England NPCC Connecticut: Maine: Massachusetts: New Hampshire: Rhode Island: Vermont: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 68476
2020 4 04/20/2020 12:59 AM 04/20/2020 8:40 AM 7 Hours, 41 Minutes Southern Company SERC Alabama: Mississippi: Georgia: Florida: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 552 77341
2020 4 04/23/2020 4:30 AM 04/23/2020 7:00 AM 2 Hours, 30 Minutes Entergy Corp SERC Mississippi: Arkansas: Louisiana: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 55184
2020 4 04/23/2020 8:00 AM 04/23/2020 11:40 PM 15 Hours, 40 Minutes Southern Company SERC Alabama: Georgia: Mississippi: Florida: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 375 52163
2020 4 04/24/2020 9:00 PM 04/24/2020 9:33 PM 0 Hours, 33 Minutes Pacific Gas & Electric Co WECC California: Placer County, Nevada County; Electrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical system.-System Operations 5 945
2020 4 04/26/2020 1:38 AM . . . Hours, . Minutes Florida Power & Light FRCC Florida: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 49999
2020 4 04/28/2020 8:01 PM 04/28/2020 11:21 PM 3 Hours, 20 Minutes Entergy - Transmission Operations Engineering TRE Texas: Jefferson County; Unexpected 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 Interruption 14 1
2020 4 04/29/2020 5:55 AM 04/29/2020 7:00 PM 13 Hours, 5 Minutes CenterPoint Energy Houston Electric, LLC TRE Texas: Harris County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 146660
2020 4 04/29/2020 6:00 AM 04/29/2020 12:31 PM 6 Hours, 31 Minutes Entergy Corp SERC Louisiana: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 77933
2020 4 04/30/2020 3:00 PM . . . Hours, . Minutes Exelon Corporation/PECO RF Pennsylvania: Bucks County, Chester County, Delaware County, Montgomery County, Philadelphia County, York County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 78007
2020 5 05/04/2020 11:59 AM 05/07/2020 8:00 PM 80 Hours, 1 Minutes Tennessee Valley Authority SERC Tennessee: Davidson County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 500 130000
2020 5 05/13/2020 5:12 AM 05/13/2020 2:07 PM 8 Hours, 55 Minutes Bonneville Power Administration WECC Washington: Unexpected 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 Interruption 0 0
2020 5 05/15/2020 5:55 PM 05/17/2020 6:00 PM 48 Hours, 5 Minutes Niagara Mohawk Power Corporation (dba National Grid) NPCC New York: Saratoga County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 52
2020 5 05/22/2020 4:35 PM 05/23/2020 3:29 PM 22 Hours, 54 Minutes Duke Energy Carolinas SERC North Carolina: South Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 108190
2020 5 05/24/2020 4:45 PM . . . Hours, . Minutes Oklahoma Gas & Electric Co SPP RE Central Oklahoma Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 54000
2020 5 05/25/2020 10:58 AM 05/25/2020 1:00 PM 2 Hours, 2 Minutes LCRA Transmission Services Corporation TRE Texas: Kerr County; Unexpected 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 Interruption 8 3745
2020 5 05/27/2020 5:15 PM 05/29/2020 6:30 AM 37 Hours, 15 Minutes CenterPoint Energy Houston Electric, LLC TRE Texas: Harris County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 382000
2020 5 05/27/2020 5:20 PM . . . Hours, . Minutes CenterPoint Energy TRE Texas: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 273269
2020 5 05/29/2020 5:01 PM 05/29/2020 6:57 PM 1 Hours, 56 Minutes FirstEnergy Corp RF Pennsylvania: Warren County; Unexpected 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 Interruption 0 0
2020 6 06/03/2020 12:30 PM 06/03/2020 6:00 PM 5 Hours, 30 Minutes Exelon Corporation/PECO RF Pennsylvania: Bucks County, Chester County, Delaware County, Montgomery County, Philadelphia County, York County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 708000
2020 6 06/03/2020 1:00 PM 06/06/2020 4:30 PM 75 Hours, 30 Minutes Public Service Electric & Gas RF New Jersey: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 80 87000
2020 6 06/03/2020 1:36 PM 06/03/2020 4:30 PM 2 Hours, 54 Minutes Jersey Central Power & Lt Co RF New Jersey: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 78079
2020 6 06/09/2020 11:21 AM 06/09/2020 12:01 PM 0 Hours, 40 Minutes Bonneville Power Administration WECC Washington: Unexpected 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 Interruption 0 0
2020 6 06/10/2020 12:22 PM 06/10/2020 5:00 PM 4 Hours, 38 Minutes Consumers Energy Co RF Michigan: Gratiot County, Lake County, Missaukee County, Benzie County, Leelanau County, Manistee County, Wexford County, Montcalm County, Kent County, Ottawa County, Van Buren County, St. Joseph County, Arenac County, Saginaw County, Calhoun County, Branch County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 270000
2020 6 06/10/2020 5:24 PM 06/11/2020 6:00 PM 24 Hours, 36 Minutes American Electric Power - (RFC Reliability Region) RF Ohio: Indiana: Kentucky: West Virginia: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 85822
2020 6 06/10/2020 7:30 PM . . . Hours, . Minutes Detroit Edison Co RF Michigan: Oakland County, Macomb County, Wayne County, Sanilac County, Tuscola County, Huron County, Lapeer County, Livingston County, Monroe County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 237000
2020 6 06/27/2020 4:00 PM 06/28/2020 2:27 AM 10 Hours, 27 Minutes Southern Company SERC Alabama: Georgia: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 33480 78109
2020 6 06/29/2020 2:32 PM 06/29/2020 4:35 PM 2 Hours, 3 Minutes Entergy - Transmission Operations Engineering SPP RE Arkansas: Garland County; Unexpected 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 Interruption 0 0
2020 7 07/01/2020 7:26 PM 07/01/2020 7:44 PM 0 Hours, 18 Minutes FirstEnergy Corp RF Pennsylvania: Unexpected 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 Interruption 32 2013
2020 7 07/02/2020 8:30 PM . . . Hours, . Minutes California Department of Water Resources WECC California: Butte County; Fuel supply emergencies that could impact electric power system adequacy or reliability.-Fuel Supply Deficiency 0 0
2020 7 07/07/2020 11:38 AM 07/07/2020 6:24 PM 6 Hours, 46 Minutes Los Angeles Department of Water & Power WECC California: Los Angeles County; Unexpected 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 Interruption 0 0
2020 7 07/07/2020 1:09 PM 07/08/2020 8:17 AM 19 Hours, 8 Minutes Public Service Company of Colorado WECC Colorado: Unexpected 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 Interruption 0 0
2020 7 07/07/2020 7:17 PM 07/07/2020 11:49 PM 4 Hours, 32 Minutes American Electric Power - (RFC Reliability Region) RF West Virginia: Wyoming County; Unexpected 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 Interruption Unknown Unknown
2020 7 07/08/2020 6:45 PM . . . Hours, . Minutes California Department of Water Resources WECC California: Fuel supply emergencies that could impact electric power system adequacy or reliability.-Fuel Supply Deficiency 0 0
2020 7 07/11/2020 4:55 AM . . . Hours, . Minutes California Department of Water Resources WECC California: Fuel supply emergencies that could impact electric power system adequacy or reliability.-Fuel Supply Deficiency 0 0
2020 7 07/11/2020 9:30 PM . . . Hours, . Minutes Southwest Power Pool, Inc. SPP RE Oklahoma: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 94700
2020 7 07/11/2020 11:30 PM 07/12/2020 6:30 AM 7 Hours, 0 Minutes Oklahoma Gas & Electric Co SPP RE Oklahoma: Arkansas: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 68000
2020 7 07/12/2020 4:30 AM 07/13/2020 5:00 AM 24 Hours, 30 Minutes Oncor Electric Delivery Company LLC TRE Texas: Collin County, Dallas County, Denton County, Rockwall County, Tarrant County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 48000
2020 7 07/19/2020 10:30 AM . . . Hours, . Minutes Somerset Operating Company NPCC New York: Niagara County Fuel supply emergencies that could impact electric power system adequacy or reliability.-Fuel Supply Deficiency 675  
2020 7 07/19/2020 2:30 PM 07/21/2020 6:48 PM 52 Hours, 18 Minutes Detroit Edison Co RF Michigan: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 158500
2020 7 07/22/2020 11:30 AM 07/22/2020 2:19 PM 2 Hours, 49 Minutes FirstEnergy Corp RF West Virginia: Tucker County; Unexpected 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 Interruption 0 0
2020 7 07/25/2020 7:58 PM 07/27/2020 7:00 PM 47 Hours, 2 Minutes American Electric Power - Texas TRE Texas: Nueces County, Kleberg County, Cameron County, Willacy County, Hidalgo County, Starr County, Kenedy County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 201208
2020 7 07/25/2020 9:00 PM 07/26/2020 4:00 PM 19 Hours, 0 Minutes Magic Valley Electric Cooperative, Inc. TRE Texas: Hidalgo County, Cameron County, Starr County, Kenedy County, Willacy County, Brooks County, Jim Hogg County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 125 84000
2020 7 07/30/2020 5:54 PM 07/30/2020 8:18 PM 2 Hours, 24 Minutes Western Area Power Administration - Upper Great Plains Region MRO Nebraska: Scotts Bluff County; Unexpected 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 Interruption 0 0

Note: Customers affected are estimates and are preliminary.
Source: Form OE-417, 'Electric Emergency Incident and Disturbance Report.'