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Electric Power Monthly

Data for May 2022 Release Date: July 26, 2022 Next Release Date: August 24, 2022 full reportPDF
SAS Output
Table B.1 Major Disturbances and Unusual Occurrences, Year-to-Date 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 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 04/10/2022 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 04/11/2022 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

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