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Electric Power Monthly

Data for November 2023 Release Date: January 24, 2024 Next Release Date: February 26, 2024 Full report PDF
SAS Output
Table B.2 Major Disturbances and Unusual Occurrences, 2022

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
2022 1 01/02/2022 1:21 PM 01/02/2022 5:38 PM 4 Hours, 17 Minutes Pacific Gas & Electric Co WECC California: Tuolumne County; Electrical 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 system-Severe Weather 3 1706
2022 1 01/03/2022 1:00 AM 01/03/2022 2:00 PM 13 Hours, 0 Minutes Southern Company SERC Georgia: Alabama: Mississippi: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 283 40885
2022 1 01/03/2022 5:00 AM 01/04/2022 6:00 PM 37 Hours, 0 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 60424
2022 1 01/03/2022 5:30 AM 01/04/2022 12:30 PM 31 Hours, 0 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 142000
2022 1 01/05/2022 12:32 PM 01/05/2022 12:45 PM 0 Hours, 13 Minutes Eversource Energy Company (NSTAR) NPCC Massachusetts: Plymouth 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).-System Operations 0 0
2022 1 01/08/2022 2:56 AM 01/08/2022 3:03 AM 0 Hours, 7 Minutes American Electric Power - Texas TRE Texas: Cameron County, Willacy 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).-System Operations 0 0
2022 1 01/09/2022 6:08 PM . . . Hours, . Minutes Entergy - Transmission Operations Engineering SERC Mississippi: Adams 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).-System Operations Unknown Unknown
2022 1 01/14/2022 8:34 AM 01/14/2022 8:42 AM 0 Hours, 8 Minutes Southwestern Public Service TRE/WECC Texas: Potter County; New Mexico: 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
2022 1 01/16/2022 5:15 AM 01/17/2022 12:06 AM 18 Hours, 51 Minutes Southern Company SERC Georgia: Alabama: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 436 61113
2022 1 01/16/2022 12:05 PM 01/17/2022 8:45 AM 20 Hours, 40 Minutes Duke Energy Carolinas SERC North Carolina: Jackson County; South Carolina: Greenville County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 51289
2022 1 01/16/2022 1:15 PM 01/16/2022 5:15 PM 4 Hours, 0 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 74638
2022 1 01/24/2022 10:27 AM 01/24/2022 10:51 AM 0 Hours, 24 Minutes Public Utility District #1 of Chelan County (CHPD) WECC Washington: Chelan 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).-System Operations 0 0
2022 1 01/28/2022 3:41 PM 01/28/2022 9:30 PM 5 Hours, 49 Minutes Public Service Company of Colorado WECC Colorado: Douglas County, Pueblo County, El Paso County, Prowers 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
2022 1 01/29/2022 8:45 AM 01/30/2022 1:00 AM 16 Hours, 15 Minutes ISO New England NPCC Connecticut: Massachusetts: New Hampshire: Rhode Island: Vermont: Maine: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 120 12000
2022 2 02/01/2022 12:13 PM 02/01/2022 12:25 PM 0 Hours, 12 Minutes Pacific Gas & Electric Co WECC California: Yuba County; Electrical 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 system-System Operations 10 8124
2022 2 02/03/2022 10:00 AM 02/07/2022 8:00 PM 106 Hours, 0 Minutes Memphis Light Gas and Water Division SERC Tennessee: Shelby County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Transmission Interruption Unknown 255000
2022 2 02/03/2022 12:56 PM . . . Hours, . Minutes American Electric Power RF Ohio: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Transmission Interruption Unknown 51000
2022 2 02/03/2022 12:56 PM 02/04/2022 8:30 PM 31 Hours, 34 Minutes American Electric Power - (RFC Reliability Region) (8400 Smiths Mill Road, New Albany Ohio 43054) RF Ohio: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Transmission Interruption Unknown 51000
2022 2 02/04/2022 1:10 PM . . . Hours, . Minutes Central Hudson Gas & Elec Corp NPCC New York: Ulster County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Transmission Interruption Unknown 67404
2022 2 02/04/2022 6:21 PM 02/04/2022 10:00 PM 3 Hours, 39 Minutes ERCOT TRE Texas: Electrical 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 system-Transmission Interruption Unknown Unknown
2022 2 02/18/2022 7:10 AM 02/18/2022 4:25 PM 9 Hours, 15 Minutes ISO New England NPCC Connecticut: Maine: Massachusetts: New Hampshire: Vermont: Rhode Island: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 7 7047
2022 2 02/24/2022 10:25 AM 02/24/2022 10:31 AM 0 Hours, 6 Minutes Entergy - Transmission Operations Engineering TRE Texas: Montgomery 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 3 1405
2022 3 03/01/2022 1:43 PM 03/01/2022 1:47 PM 0 Hours, 4 Minutes Duke Energy Midwest RF Indiana: Marion County, Shelby County, Hendricks 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).-System Operations 0 0
2022 3 03/05/2022 10:58 PM 03/06/2022 7:38 PM 20 Hours, 40 Minutes Exelon Corporation / Commonwealth Edison Company (ComEd) NCR08013 SERC/RF Illinois: DuPage 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).-System Operations 0 0
2022 3 03/08/2022 1:50 PM 03/08/2022 2:39 PM 0 Hours, 49 Minutes Southern Company TRE Georgia: Terrell 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).-System Operations 48 5855
2022 3 03/10/2022 8:51 AM 03/10/2022 3:15 PM 6 Hours, 24 Minutes Western Area Power Administration 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
2022 3 03/12/2022 8:33 AM . . . Hours, . 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 139 19380
2022 3 03/18/2022 4:32 PM . . . Hours, . Minutes Florida Power & Light SERC Florida: Palm Beach 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 78 20423
2022 3 03/21/2022 7:00 PM 03/24/2022 12:00 AM 53 Hours, 0 Minutes Oncor Electric Delivery Company LLC TRE Texas: Anderson County, Bell County, Bosque County, Comanche County, Coryell County, Falls County, Freestone County, Hamilton County, Henderson County, Hill County, Lampasas County, Leon County, Limestone County, McLennan County, Milam County, Mills County, Robertson County, Collin County, Cooke County, Dallas County, Denton County, Ellis County, Erath County, Fannin County, Grayson County, Hood C Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 170000
2022 3 03/22/2022 12:06 AM 03/22/2022 4:29 AM 4 Hours, 23 Minutes Western Area Power Administration - Upper Great Plains Region - (NCR01036) MRO South Dakota: 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
2022 3 03/30/2022 3:45 PM . . . Hours, . Minutes Entergy Corp SERC Louisiana: Mississippi: Arkansas: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 66448
2022 3 03/31/2022 12:04 AM 03/31/2022 9:20 AM 9 Hours, 16 Minutes Southern Company SERC Georgia: Alabama: Mississippi: Florida: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 157 22000
2022 3 03/31/2022 8:59 AM 04/01/2022 7:30 PM 34 Hours, 31 Minutes Detroit Edison Co RF Michigan: Huron County, Tuscola County, St. Clair County, Washtenaw County, Macomb County, Wayne County, Monroe County, Oakland County, Livingston County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 60 70000
2022 4 04/05/2022 4:40 AM 04/05/2022 5:21 PM 12 Hours, 41 Minutes Evergy SERC/RF Missouri: Jackson 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).-System Operations 73 16299
2022 4 04/10/2022 3:41 PM 04/10/2022 3:50 PM 0 Hours, 9 Minutes Entergy - Transmission Operations Engineering SERC Arkansas: Pulaski County; Electrical 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 system-System Operations 5 Unknown
2022 4 04/10/2022 3:41 PM 04/10/2022 3:50 PM 0 Hours, 9 Minutes Entergy Arkansas Inc SERC Arkansas: Pulaski County; Electrical 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 system-System Operations 5 Unknown
2022 4 04/11/2022 9:15 AM 04/13/2022 8:00 AM 46 Hours, 45 Minutes Portland General Electric Co WECC Oregon: Multnomah County, Clackamas County, Marion County, Yamhill County, Washington County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 3140 73717
2022 4 04/13/2022 10:04 PM 04/14/2022 12:02 AM 1 Hours, 58 Minutes Entergy - Transmission Operations Engineering SERC Louisiana: Iberia Parish; 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).-System Operations 7 2429
2022 4 04/14/2022 5:59 AM 04/14/2022 6:13 AM 0 Hours, 14 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 164 262268
2022 4 04/16/2022 11:08 AM . . . Hours, . Minutes MidAmerican Energy Co SERC/MRO Iowa: Polk County; Illinois: 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).-System Operations 0 0
2022 4 04/16/2022 5:44 PM . . . Hours, . Minutes Pacific Gas & Electric Co WECC California: Electrical 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 system-System Operations 9290 Unknown
2022 4 04/19/2022 4:07 AM . . . Hours, . Minutes New York State Electric & Gas NPCC New York: Broome County, Chemung County, Chenango County, Clinton County, Columbia County, Cortland County, Delaware County, Dutchess County, Erie County, Essex County, Greene County, Hamilton County, Herkimer County, Madison County, Oneida County, Otsego County, Putnam County, Saratoga County, Schoharie County, Schuyler County, Steuben County, Sullivan County, Tioga County, Tompkins County, Ulste Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 84033
2022 4 04/19/2022 6:00 AM . . . Hours, . Minutes National Grid NPCC New York: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 97000
2022 4 04/19/2022 8:41 AM 04/19/2022 12:10 PM 3 Hours, 29 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 67754
2022 4 04/22/2022 11:00 PM 04/24/2022 4:00 PM 41 Hours, 0 Minutes Southwest Power Pool, Inc. MRO North Dakota: Uncontrolled loss of 300 Megawatts or more of firm system loads for 15 minutes or more from a single incident-Severe Weather 1000 Unknown
2022 4 04/22/2022 11:16 PM 04/24/2022 4:00 PM 40 Hours, 44 Minutes Western Area Power Administration - Upper Great Plains Region - (NCR01036) WECC/MRO North Dakota: Mountrail County, Williams County, Ward County, Burke County, Bottineau County, McLean County, Walsh County, Bowman County, Stark County, Dunn County, Mercer County; Montana: Wibaux County, Richland 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 Unknown Unknown
2022 4 04/23/2022 3:38 PM 04/24/2022 4:00 AM 12 Hours, 22 Minutes Mountrail-Williams Elec Coop MRO North Dakota: Mountrail County, Williams County; Uncontrolled loss of 300 Megawatts or more of firm system loads for 15 minutes or more from a single incident-Severe Weather 480 18430
2022 4 04/23/2022 7:42 PM 04/24/2022 4:17 PM 20 Hours, 35 Minutes MidAmerican Energy Co SERC/MRO Iowa: Polk County, Warren County; Illinois: 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 43 22400
2022 4 04/28/2022 7:56 AM 04/28/2022 8:48 AM 0 Hours, 52 Minutes Duke Energy Carolinas SERC North Carolina: South Carolina: 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).-System Operations 74 Unknown
2022 5 05/05/2022 1:06 PM 05/05/2022 2:06 PM 1 Hours, 0 Minutes Entergy - Transmission Operations Engineering SERC Arkansas: 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
2022 5 05/11/2022 6:00 PM 05/11/2022 10:42 PM 4 Hours, 42 Minutes Northern States Power Co MRO Minnesota: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 105000
2022 5 05/12/2022 10:44 AM 05/12/2022 1:34 PM 2 Hours, 50 Minutes Empire District Electric Co SERC Missouri: Barry County, Dade County, Lawrence 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 800 0
2022 5 05/12/2022 4:50 PM 05/13/2022 2:48 AM 9 Hours, 58 Minutes Western Area Power Administration - Upper Great Plains Region - (NCR01036) MRO South Dakota: Davison 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 Unknown
2022 5 05/15/2022 11:30 PM 05/17/2022 11:45 PM 48 Hours, 15 Minutes Oncor Electric Delivery Company LLC TRE Texas: Collin County, Dallas County, Denton County, Ellis County, Grayson County, Henderson County, Hunt County, Kaufman County, Navarro County, Rockwall County, Smith County, Tarrant County, Van Zandt County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 150000
2022 5 05/17/2022 12:10 PM . . . Hours, . Minutes Southwestern Public Service WECC New Mexico: Roosevelt 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 25 Unknown
2022 5 05/18/2022 5:00 PM 05/31/2022 12:00 PM 307 Hours, 0 Minutes Public Service Company of New Mexico WECC New Mexico: San Juan County; Fuel supply emergencies that could impact electric power system adequacy or reliability-Fuel Supply Deficiency 560 0
2022 5 05/20/2022 5:26 PM 05/20/2022 5:33 PM 0 Hours, 7 Minutes Consolidated Edison of New York, Inc. NPCC New York: 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
2022 5 05/22/2022 2:30 AM 05/22/2022 6:52 PM 16 Hours, 22 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 52172
2022 5 05/29/2022 4:41 PM 05/31/2022 11:29 AM 42 Hours, 48 Minutes FirstEnergy Corp: Met-Ed RF Pennsylvania: 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 0 0
2022 6 06/04/2022 12:59 PM 06/05/2022 2:15 AM 13 Hours, 16 Minutes ERCOT TRE Texas: Ector County; Total 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.-Generation Inadequacy 0 0
2022 6 06/05/2022 3:20 PM 06/05/2022 8:12 PM 4 Hours, 52 Minutes California ISO WECC California: Firm load shedding of 100 Megawatts or more implemented under emergency operational polic-Generation Inadequacy Unknown Unknown
2022 6 06/06/2022 10:21 AM 06/06/2022 10:24 AM 0 Hours, 3 Minutes Pacific Gas & Electric Co WECC California: Shasta County; Electrical 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 system-System Operations 13 4000
2022 6 06/08/2022 12:00 AM 06/08/2022 4:00 AM 4 Hours, 0 Minutes Southwest Power Pool, Inc. SERC/MRO Kansas: Missouri: Nebraska:  Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 62000
2022 6 06/08/2022 1:00 AM 06/08/2022 4:00 AM 3 Hours, 0 Minutes Southwest Power Pool, Inc. SERC Missouri:  Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Distribution Interruption Unknown 60000
2022 6 06/08/2022 1:00 AM 06/08/2022 6:00 AM 5 Hours, 0 Minutes Evergy SERC/MRO Missouri: Clay County, Jackson County; Kansas: Johnson County;  Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Transmission Interruption Unknown 911888
2022 6 06/10/2022 8:45 AM . . . Hours, . Minutes Pacific Gas & Electric Co WECC California: Electrical 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 system-System Operations 13437 445
2022 6 06/10/2022 12:08 PM 06/10/2022 9:30 PM 9 Hours, 22 Minutes El Paso Electric TRE Texas: El Paso County; Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System-Actual Physical Attack/Vandalism 0 0
2022 6 06/10/2022 8:20 PM 06/10/2022 8:28 PM 0 Hours, 8 Minutes California ISO WECC California: Kern County; Firm load shedding of 100 Megawatts or more implemented under emergency operational polic-System Operations 100 Unknown
2022 6 06/10/2022 8:27 PM 06/10/2022 9:30 PM 1 Hours, 3 Minutes Pacific Gas & Electric Co WECC California: Kern County; Firm load shedding of 100 Megawatts or more implemented under emergency operational polic-System Operations 100 39094
2022 6 06/12/2022 11:30 PM 06/13/2022 11:30 PM 24 Hours, 0 Minutes American Electric Power - (RFC Reliability Region) (8400 Smiths Mill Road, New Albany Ohio 43054) SERC/RF Ohio: West Virginia: Virginia: Indiana:  Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Transmission Interruption 14000 100000
2022 6 06/13/2022 6:00 PM 06/14/2022 6:15 PM 24 Hours, 15 Minutes Duke Energy Midwest SERC/RF Ohio: Kentucky:  Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Transmission Interruption Unknown 162551
2022 6 06/14/2022 1:46 PM . . . Hours, . Minutes American Electric Power - (RFC Reliability Region) (8400 Smiths Mill Road, New Albany Ohio 43054) RF Ohio: Firm load shedding of 100 Megawatts or more implemented under emergency operational polic-System Operations 373 Unknown
2022 6 06/15/2022 9:00 PM . . . Hours, . Minutes WEC Energy Group (WEPCO, WPSC, UMERC, WEP-MIUP) RF/MRO Wisconsin: Outagamie County, Waupaca County, Winnebago County, Brown County, Sheboygan County, Ozaukee County, Waukesha County; Michigan: Iron County;  Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 90 57000
2022 6 06/16/2022 4:31 PM 06/16/2022 8:07 PM 3 Hours, 36 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 77908
2022 6 06/17/2022 5:30 PM 06/19/2022 9:15 PM 51 Hours, 45 Minutes American Electric Power - (RFC Reliability Region) (8400 Smiths Mill Road, New Albany Ohio 43054) SERC/RF West Virginia: Virginia: Kentucky:  Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 150000
2022 6 06/17/2022 5:37 PM 06/18/2022 12:54 AM 7 Hours, 17 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 91056
2022 6 06/17/2022 6:45 PM 06/18/2022 1:32 PM 18 Hours, 47 Minutes Duke Energy Progress SERC North Carolina:  Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 44000
2022 6 06/20/2022 12:54 PM 06/20/2022 2:23 PM 1 Hours, 29 Minutes Northern States Power Co MRO Minnesota: Hennepin 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).-System Operations 0 15604
2022 6 06/22/2022 4:56 PM 06/23/2022 2:00 AM 9 Hours, 4 Minutes Dominion Energy VA SERC/RF Virginia:  Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Distribution Interruption Unknown 100000
2022 6 06/23/2022 10:55 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
2022 6 06/24/2022 11:09 PM 06/25/2022 12:00 AM 0 Hours, 51 Minutes Entergy Services, Inc. SERC Louisiana: Fuel supply emergencies that could impact electric power system adequacy or reliability-Fuel Supply Deficiency Unknown Unknown
2022 6 06/27/2022 2:26 PM 06/28/2022 3:56 AM 13 Hours, 30 Minutes American Electric Power - Texas TRE Texas: Victoria 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 14 2491
2022 7 07/04/2022 6:21 PM . . . Hours, . Minutes Pacific Gas & Electric Co WECC California: Amador County; Electrical 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 system-System Operations 3 3001
2022 7 07/06/2022 2:39 PM 07/07/2022 3:54 AM 13 Hours, 15 Minutes Duke Energy Midwest RF/SERC Ohio: Kentucky: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Transmission Interruption Unknown 104700
2022 7 07/09/2022 2:47 AM 07/09/2022 2:59 AM 0 Hours, 12 Minutes Cleco Power LLC SERC Louisiana: Rapides Parish; 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).-System Operations Unknown 4724
2022 7 07/10/2022 9:00 PM 07/11/2022 8:00 PM 23 Hours, 0 Minutes ERCOT TRE Texas: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System-System Operations Unknown Unknown
2022 7 07/12/2022 4:00 PM . . . Hours, . Minutes Baltimore Gas and Electric RF Maryland: Baltimore County, Carroll County, Harford County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 800 165000
2022 7 07/12/2022 6:00 PM 07/12/2022 10:00 PM 4 Hours, 0 Minutes Pepco Holdings RF District of Columbia: Maryland: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 50200
2022 7 07/13/2022 11:30 AM 07/13/2022 9:00 PM 9 Hours, 30 Minutes ERCOT TRE Texas: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System-System Operations Unknown Unknown
2022 7 07/18/2022 9:15 AM . . . Hours, . Minutes South Carolina Pub Serv Auth SERC South Carolina: Fuel supply emergencies that could impact electric power system adequacy or reliability-Fuel Supply Deficiency 4500 0
2022 7 07/23/2022 8:45 PM 07/24/2022 11:30 AM 14 Hours, 45 Minutes Consumers Energy Co RF Michigan: Muskegon County, Ottawa County, Kent County, Montcalm County, Ionia County, Allegan County, Van Buren County, Kalamazoo County, Barry County, Mason County, Shiawassee County, Ingham County, Genesee County, Saginaw County, Midland County, Wexford County, Grand Traverse County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 93750
2022 7 07/25/2022 12:38 AM 07/25/2022 1:46 PM 13 Hours, 8 Minutes FirstEnergy Corp RF Pennsylvania: Erie 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
2022 7 07/26/2022 6:38 AM 07/26/2022 12:57 PM 6 Hours, 19 Minutes LCRA TSC TRE Texas: Hays 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).-System Operations 0 0
2022 8 08/03/2022 2:30 AM . . . Hours, . Minutes Northern States Power Co MRO/RF Minnesota: Wisconsin: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 80000
2022 8 08/03/2022 5:00 PM 08/03/2022 8:30 PM 3 Hours, 30 Minutes Consumers Energy Co RF Michigan: Allegan County, Van Buren County, Barry County, Kalamazoo County, Calhoun County, Jackson County, Calhoun County, Washtenaw County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 91264
2022 8 08/03/2022 7:00 PM 08/05/2022 8:53 AM 37 Hours, 53 Minutes Detroit Edison Co RF Michigan: Wayne County, Washtenaw County, St. Clair County, Macomb County, Monroe County, Oakland County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 71000
2022 8 08/04/2022 6:00 PM 08/05/2022 2:00 AM 8 Hours, 0 Minutes Baltimore Gas & Electric Co RF Maryland: Anne Arundel County, Baltimore County, Baltimore, City of[16]; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 75500
2022 8 08/09/2022 4:42 PM 08/09/2022 10:12 PM 5 Hours, 30 Minutes Jersey Central Power & Lt Co RF Ohio: Loss of electric service to more than 50,000 customers for 1 hour or more-System Operations Unknown 62464
2022 8 08/10/2022 1:25 AM 08/10/2022 1:30 AM 0 Hours, 5 Minutes Entergy - Transmission Operations Engineering SERC Arkansas: Lawrence 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 24 0
2022 8 08/10/2022 7:56 PM 08/11/2022 8:00 PM 24 Hours, 4 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 140464
2022 8 08/15/2022 11:43 PM 08/16/2022 7:14 AM 7 Hours, 31 Minutes Western Area Power Administration - Rocky Mountain Region WECC/MRO Wyoming: Nebraska: 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 5000
2022 8 08/22/2022 12:46 PM 08/22/2022 1:09 PM 0 Hours, 23 Minutes LCRA TSC TRE Texas: DeWitt 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).-System Operations 24 6385
2022 8 08/22/2022 8:40 PM 08/22/2022 9:57 PM 1 Hours, 17 Minutes El Paso Electric TRE Texas: El Paso 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 0 0
2022 8 08/29/2022 3:00 PM 09/01/2022 9:00 AM 66 Hours, 0 Minutes Consumers Energy Co RF Michigan: Ottawa County, Allegan County, Van Buren County, Montcalm County, Kent County, Barry County, Kalamazoo County, St. Joseph County, Branch County, Hillsdale County, Calhoun County, Jackson County, Eaton County, Clinton County, Shiawassee County, Montcalm County, Isabella County, Mecosta County, Midland County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 197740
2022 8 08/29/2022 5:50 PM . . . Hours, . Minutes Detroit Edison Co RF Michigan: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown Unknown
2022 9 09/04/2022 4:00 PM 09/06/2022 8:00 AM 40 Hours, 0 Minutes Oncor Electric Delivery Company LLC TRE Texas: Tarrant County, Collin County, Dallas County, Ellis County, Kaufman County, Rockwall County, Williamson County, Denton County, Archer County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 190000
2022 9 09/04/2022 6:50 PM 09/05/2022 2:45 AM 7 Hours, 55 Minutes Canadian Solar (USA) Energy Corporation WECC California: Kings County; Cyber event that could potentially impact electric power system adequacy or reliability-Cyber Event 0 0
2022 9 09/06/2022 6:00 AM 09/06/2022 6:22 AM 0 Hours, 22 Minutes Brownsville Public Utilities Board TRE Texas: Cameron County; Physical 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 Activity 0 0
2022 9 09/10/2022 10:30 PM 09/10/2022 10:31 PM 0 Hours, 1 Minutes American Electric Power (Regulated Generation) RF Indiana: Spencer County; Physical 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 Activity Unknown Unknown
2022 9 09/22/2022 3:58 AM 09/22/2022 4:00 AM 0 Hours, 2 Minutes Duke Energy Florida SERC Florida: Pinellas County, Pasco County, Orange County, Lake County; Physical 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.-Vandalism Unknown Unknown
2022 9 09/28/2022 3:00 PM . . . Hours, . Minutes Tampa Electric Company SERC Florida: Hillsborough County, Polk County, Pasco County, Pinellas County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 750 291361
2022 9 09/28/2022 3:00 PM 10/03/2022 3:53 PM 120 Hours, 53 Minutes Duke Energy Florida SERC Florida: 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, Su Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 676000
2022 9 09/28/2022 6:00 PM 09/30/2022 3:20 PM 45 Hours, 20 Minutes Seminole Electric Cooperative Inc SERC Florida: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 1000 116937
2022 9 09/29/2022 3:27 AM . . . Hours, . Minutes Lakeland Electric SERC Florida: Polk County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 150 15797
2022 9 09/29/2022 4:00 AM 10/03/2022 12:00 AM 92 Hours, 0 Minutes Orlando Utilities Comm SERC Florida: Orange County, Osceola County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 0 0
2022 9 09/30/2022 2:45 AM 10/01/2022 4:15 PM 37 Hours, 30 Minutes Duke Energy Progress SERC North Carolina: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 48323
2022 9 09/30/2022 1:46 PM 09/30/2022 6:09 PM 4 Hours, 23 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 108930
2022 9 09/30/2022 6:30 PM 10/01/2022 6:36 PM 24 Hours, 6 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 154100
2022 10 10/08/2022 4:23 PM 10/08/2022 4:50 PM 0 Hours, 27 Minutes Ravenswood Generating Station NPCC New York: Queens County; Physical 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 activity 100 0
2022 10 10/14/2022 1:15 PM 10/14/2022 5:45 PM 4 Hours, 30 Minutes ISO New England NPCC Connecticut: Massachusetts: Maine: Rhode Island: New Hampshire: Vermont: Loss of electric service to more than 50,000 customers for 1 hour or more-Sever Weather Unknown 76388
2022 10 10/21/2022 11:15 AM 10/21/2022 11:18 AM 0 Hours, 3 Minutes Western Area Power Administration - Sierra Nevada Region (114 Parkshore Dr. Folsom, CA. 95630) WECC California: Trinity County; Physical 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 activity 0 0
2022 10 10/25/2022 1:45 AM 10/25/2022 1:50 PM 12 Hours, 5 Minutes CenterPoint Energy TRE Texas: Harris County; Loss of electric service to more than 50,000 customers for 1 hour or more-System Operations Unknown 109865
2022 11 11/02/2022 3:11 PM 11/02/2022 3:25 PM 0 Hours, 14 Minutes Brownsville Public Utilities Board TRE Texas: Cameron County; Physical 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 Activity 0 0
2022 11 11/04/2022 8:05 PM 11/07/2022 9:00 AM 60 Hours, 55 Minutes Puget Sound Energy WECC Washington: Island County, King County, Kittitas County, Thurston County, Kitsap County, Pierce County, Skagit County, Whatcom County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 214000
2022 11 11/05/2022 1:00 PM 11/08/2022 7:00 AM 66 Hours, 0 Minutes Consumers Energy Co RF Michigan: Kalamazoo County, Kent County, Calhoun County, Genesee County, Ottawa County, Muskegon County, Eaton County, Saginaw County, Van Buren County, Hillsdale County, Shiawassee County, Jackson County, Lenawee County, Branch County, Montcalm County, Monroe County, Manistee County, Roscommon County, Clinton County, Ingham County, Gladwin County, Arenac County, Ogemaw County, Iosco County, Alcon Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 158450
2022 11 11/05/2022 7:00 PM . . . Hours, . Minutes WEC Energy Group (WEPCO, WPSC, UMERC, WEP-MIUP) MRO/RF Wisconsin: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 50000
2022 11 11/05/2022 7:57 PM . . . Hours, . Minutes Detroit Edison Co RF Michigan: Oakland County, Wayne County, Monroe County, Lapeer County, St. Clair County, Washtenaw County, Macomb County, Tuscola County, Sanilac County, Huron County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 53000
2022 11 11/10/2022 6:00 AM 11/11/2022 8:47 AM 26 Hours, 47 Minutes Duke Energy Florida SERC Florida: 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, Su Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 160000
2022 11 11/23/2022 7:03 AM 11/23/2022 8:57 AM 1 Hours, 54 Minutes Brownsville Public Utilities Board TRE Texas: Cameron County; Physical 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 Activity 0 0
2022 11 11/23/2022 9:30 AM . . . Hours, . Minutes Exelon Corporation RF Maryland: Delaware: New Jersey: Pennsylvania: Illinois: District of Columbia: Cyber event that could potentially impact electric power system adequacy or reliability-Cyber Event Unknown Unknown
2022 11 11/27/2022 5:28 PM 11/27/2022 11:58 PM 6 Hours, 30 Minutes Exelon/Potomac Electric Power Company (Pepco) RF Maryland: Montgomery County; Loss of electric service to more than 50,000 customers for 1 hour or more-Transmission Interruption 190 87500
2022 11 11/30/2022 3:35 AM 11/30/2022 9:10 AM 5 Hours, 35 Minutes Southern Company SERC Alabama: Mississippi: Georgia: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 386 54110
2022 11 11/30/2022 6:45 PM 12/02/2022 4:00 AM 33 Hours, 15 Minutes ISO New England NPCC Maine: Massachusetts: Connecticut: Rhode Island: Vermont: New Hampshire: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 113 113000
2022 12 12/05/2022 6:20 PM 12/05/2022 6:55 PM 0 Hours, 35 Minutes Constellation Energy Generation, LLC RF Pennsylvania: York County; Physical 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 Activity 0 0
2022 12 12/06/2022 12:00 AM 12/06/2022 12:01 AM 0 Hours, 1 Minutes Southern Company SERC Georgia: Bartow County; Physical 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 Activity 0 0
2022 12 12/06/2022 12:00 AM 12/06/2022 12:01 AM 0 Hours, 1 Minutes Southern Company SERC Georgia: Heard County; Physical 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 Activity 0 0
2022 12 12/06/2022 8:15 AM 12/06/2022 12:15 PM 4 Hours, 0 Minutes KeyCon Operating, LLC RF Pennsylvania: Physical 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 Activity 1883 Unknown
2022 12 12/06/2022 8:26 AM 12/06/2022 8:30 AM 0 Hours, 4 Minutes LG&E KU Energy LLC SERC Kentucky: Jefferson County; Physical 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.-Vandalism 0 0
2022 12 12/06/2022 9:25 AM . . . Hours, . Minutes Sacramento Municipal Util Dist WECC California: Sacramento County; Physical 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 Activity 0 0
2022 12 12/06/2022 12:45 PM . . . Hours, . Minutes Lightstone Generation LLC RF Ohio: Physical 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 Activity 2600 Unknown
2022 12 12/07/2022 1:35 PM 12/07/2022 1:40 PM 0 Hours, 5 Minutes Exelon Corporation / Commonwealth Edison Company (ComEd) NCR08013 SERC/RF Illinois: Cook County; Physical 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 Activity 0 0
2022 12 12/07/2022 4:42 PM 12/07/2022 9:00 PM 4 Hours, 18 Minutes Duke Energy Carolinas SERC North Carolina: South Carolina: Physical 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 Activity 0 0
2022 12 12/08/2022 12:36 PM . . . Hours, . Minutes Wabash Valley Power RF Indiana: Vigo County; Physical 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 Activity 0 0
2022 12 12/10/2022 11:00 AM 12/12/2022 6:00 AM 43 Hours, 0 Minutes Associated Electric Cooperative Inc SERC Missouri: Greene County, Dunklin County; Physical 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 Activity 0 0
2022 12 12/14/2022 12:52 PM . . . Hours, . Minutes Montana-Dakota Utilities Co WECC Montana: Richland County; Physical 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 Activity Unknown Unknown
2022 12 12/16/2022 11:30 PM 12/18/2022 11:21 PM 47 Hours, 51 Minutes ISO New England NPCC Massachusetts: Vermont: New Hampshire: Maine: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 36600
2022 12 12/17/2022 7:45 PM 12/17/2022 7:46 PM 0 Hours, 1 Minutes Oncor Electric Delivery Company LLC TRE Texas: Kaufman County; Physical 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 Activity 0 0
2022 12 12/22/2022 9:04 AM 12/25/2022 12:00 AM 62 Hours, 56 Minutes Tennessee Valley Authority SERC Tennessee: Alabama: Mississippi: Kentucky: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy.-Transmission Interruption 3200 Unknown
2022 12 12/23/2022 3:03 AM 12/23/2022 12:30 PM 9 Hours, 27 Minutes Southern Company SERC Alabama: Georgia: Mississippi: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 236 33010
2022 12 12/23/2022 5:20 AM . . . Hours, . Minutes ISO New England NPCC Connecticut: Rhode Island: Massachusetts: Vermont: New Hampshire: Maine: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 500000
2022 12 12/23/2022 6:04 AM 12/23/2022 6:40 AM 0 Hours, 36 Minutes Brownsville Public Utilities Board TRE Texas: Cameron County; Physical 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 Activity 0 0
2022 12 12/23/2022 7:30 AM 12/23/2022 10:13 PM 14 Hours, 43 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 108900
2022 12 12/23/2022 8:31 AM . . . Hours, . Minutes Memphis Light Gas and Water Division SERC Tennessee: Shelby County; Firm load shedding of 100 Megawatts or more implemented under emergency operational policy.-Severe Weather Unknown Unknown
2022 12 12/23/2022 9:45 AM 12/23/2022 5:00 PM 7 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 Unknown 66519
2022 12 12/23/2022 2:30 PM . . . Hours, . Minutes National Grid NPCC New York: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 57000
2022 12 12/24/2022 4:45 AM 12/24/2022 3:45 PM 11 Hours, 0 Minutes Duke Energy Carolinas SERC North Carolina: South Carolina: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy.-Severe Weather 1000 295000
2022 12 12/24/2022 6:15 AM 12/25/2022 9:00 AM 26 Hours, 45 Minutes Dominion Energy South Carolina SERC South Carolina: System-wide voltage reductions of 3 percent or more.-Severe Weather 4615 17600
2022 12 12/24/2022 6:35 AM 12/24/2022 4:10 PM 9 Hours, 35 Minutes Duke Energy Progress SERC North Carolina: Firm load shedding of 100 Megawatts or more implemented under emergency operational policy.-System Operations 960 130000
2022 12 12/24/2022 9:00 AM 12/24/2022 11:15 AM 2 Hours, 15 Minutes Southern Company SERC Alabama: Georgia: Mississippi: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 160 22436
2022 12 12/26/2022 8:30 AM 12/28/2022 9:00 PM 60 Hours, 30 Minutes Puget Sound Energy WECC Washington: King County, Island County, Kittitas County, Kitsap County, Pierce County, Skagit County, Thurston County, Whatcom County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 230000
2022 12 12/27/2022 7:07 AM 12/29/2022 11:10 AM 52 Hours, 3 Minutes Sacramento Municipal Util Dist WECC California: Sacramento County; Physical 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 Activity Unknown Unknown
2022 12 12/27/2022 10:12 AM . . . Hours, . Minutes Portland General Electric Co WECC Oregon: Clackamas County, Columbia County, Marion County, Multnomah County, Polk County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 83060
2022 12 12/27/2022 8:40 PM 12/27/2022 8:41 PM 0 Hours, 1 Minutes Puget Sound Energy WECC Washington: King County; Electrical 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 system.-Severe Weather 11 11600
2022 12 12/29/2022 4:00 PM . . . Hours, . Minutes Lightstone Generation LLC RF Ohio: Physical 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.-Vandalism 2600 Unknown
2022 12 12/31/2022 7:00 PM 01/01/2023 6:00 AM 11 Hours, 0 Minutes Sacramento Municipal Util Dist WECC California: Sacramento County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 161000
2022 12 12/31/2022 8:00 PM 01/03/2023 12:00 AM 52 Hours, 0 Minutes NVENERGY WECC Nevada: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 3500

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