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Electric Power Monthly

Data for May 2019  |  Release date: July 24, 2019  |  Next release: August 26, 2019 
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SAS Output
Table B.1 Major Disturbances and Unusual Occurrences, Year-to-Date 2019

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
2019 1 01/06/2019 1:00 AM 01/06/2019 12:00 PM 11 Hours, 0 Minutes Puget Sound Energy WECC Washington: King County, Thurston County, Pierce County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 230000
2019 1 01/06/2019 3:00 AM 01/09/2019 7:00 AM 76 Hours, 0 Minutes Peak Reliability WECC Washington: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 230 230000
2019 1 01/06/2019 5:56 PM 01/06/2019 9:52 PM 3 Hours, 56 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 300 90382
2019 1 01/10/2019 12:19 PM 01/10/2019 12:48 PM 0 Hours, 29 Minutes Western Area Power Administration - Upper Great Plains Region WECC Montana: Valley 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 11 2
2019 1 01/12/2019 11:30 AM . . . Hours, . Minutes Southwest Power Pool, Inc. SERC Missouri: Nebraska: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 116600
2019 1 01/12/2019 11:30 AM 01/13/2019 10:00 PM 34 Hours, 30 Minutes Kansas City Power & Light Co SPP RE Missouri: Jackson County; Kansas: Johnson County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 112530
2019 1 01/13/2019 5:30 AM 01/15/2019 5:00 PM 59 Hours, 30 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 133200 Unknown
2019 1 01/16/2019 5:26 PM 01/17/2019 12:19 PM 18 Hours, 53 Minutes Pacific Gas & Electric Co WECC California: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 190 126700
2019 1 01/18/2019 9:54 PM 01/19/2019 12:19 AM 2 Hours, 25 Minutes Nebraska Public Power District MRO 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 8 Unknown
2019 1 01/23/2019 7:26 AM 01/23/2019 5:05 PM 9 Hours, 39 Minutes Western Area Power Administration WECC Colorado: Larimer 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
2019 1 01/29/2019 6:34 PM 01/29/2019 6:36 PM 0 Hours, 2 Minutes Entergy Transmission Control Center - North SERC Louisiana: Washington 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).-Transmission Interruption Unknown Unknown
2019 1 01/30/2019 4:23 AM 02/02/2019 9:00 AM 76 Hours, 37 Minutes Prairie Power, Inc. SERC Illinois: Scott County; Fuel supply emergencies that could impact electric power system adequacy or reliability.-Fuel Supply Deficiency Unknown Unknown
2019 1 01/30/2019 7:00 AM 01/30/2019 8:08 AM 1 Hours, 8 Minutes Prairie Power, Inc. SERC Illinois: Pike County; Fuel supply emergencies that could impact electric power system adequacy or reliability.-Severe Weather Unknown Unknown
2019 1 01/30/2019 9:30 AM 01/31/2019 6:00 PM 32 Hours, 30 Minutes Detroit Edison Co RF Michigan: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System.-Severe Weather Unknown Unknown
2019 2 02/05/2019 6:17 PM 02/05/2019 8:26 PM 2 Hours, 9 Minutes Pacific Gas & Electric Co WECC California Electrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical system.-Severe Weather 42 33200
2019 2 02/07/2019 7:39 AM 02/07/2019 7:40 AM 0 Hours, 1 Minutes Entergy Transmission Control Center - North 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).-Severe Weather/Transmission Interruption 3 3370
2019 2 02/07/2019 8:55 AM 02/09/2019 4:30 PM 55 Hours, 35 Minutes Consumers Energy Co RF Michigan Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 233000
2019 2 02/08/2019 6:30 PM . . . Hours, . Minutes Puget Sound Energy WECC Washington Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 50940
2019 2 02/13/2019 2:48 AM 02/15/2019 12:28 AM 45 Hours, 40 Minutes Pacific Gas & Electric Co WECC California Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 182 121000
2019 2 02/23/2019 2:05 PM . . . Hours, . Minutes American Electric Power - (RFC Reliability Region) SERC Virginia 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
2019 2 02/24/2019 11:21 AM 02/26/2019 5:29 PM 54 Hours, 8 Minutes American Electric Power - (RFC Reliability Region) RF Ohio, Virginia, West Virginia Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 118781
2019 2 02/24/2019 12:31 PM 02/24/2019 2:57 PM 2 Hours, 26 Minutes Ohio Edison Co RF Ohio Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 157274
2019 2 02/24/2019 2:33 PM 02/24/2019 6:03 PM 3 Hours, 30 Minutes Monongahela Power Co RF Pennsylvania Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 94048
2019 2 02/24/2019 6:00 PM 02/25/2019 10:00 PM 28 Hours, 0 Minutes Duquesne Light Co RF Pennsylvania Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 132000
2019 2 02/24/2019 6:47 PM 02/25/2019 1:55 PM 19 Hours, 8 Minutes West Penn Power Company RF Pennsylvania Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 137216
2019 2 02/24/2019 8:02 PM 02/25/2019 2:30 PM 18 Hours, 28 Minutes Consumers Energy Co RF Michigan Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 115000
2019 2 02/25/2019 7:45 AM 02/25/2019 6:40 PM 10 Hours, 55 Minutes ISO New England NPCC Massachusetts 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
2019 2 02/25/2019 1:35 PM 02/26/2019 2:50 AM 13 Hours, 15 Minutes ISO New England NPCC Connecticut, Massachusetts, New Hampshire, Maine, Vermont, Rhode Island Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 72332
2019 2 02/27/2019 11:25 AM 02/27/2019 5:39 PM 6 Hours, 14 Minutes MidAmerican Energy Co MRO Iowa 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
2019 3 03/13/2019 5:50 AM 03/13/2019 10:30 AM 4 Hours, 40 Minutes Oncor Electric Delivery Company LLC TRE Texas: Midland County, Ector County, Tarrant County, Dallas County, Wichita County, Brown County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 154124
2019 3 03/13/2019 11:29 AM 03/14/2019 9:11 PM 33 Hours, 42 Minutes Public Service Company of Colorado WECC Colorado: Jefferson County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 58 58379
2019 3 03/13/2019 3:00 PM 03/14/2019 12:00 AM 9 Hours, 0 Minutes Southwest Power Pool, Inc. TRE Texas: Kansas: Oklahoma: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather/Transmission Interruption Unknown 66000
2019 3 03/13/2019 3:51 PM 03/16/2019 6:00 PM 74 Hours, 9 Minutes Southwestern Public Service TRE Texas: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather/Transmission Interruption 50 54290
2019 4 04/03/2019 5:15 AM 04/03/2019 12:39 PM 7 Hours, 24 Minutes California Department of Water Resources WECC California: Fresno County; Fuel supply emergencies that could impact electric power system adequacy or reliability.-Fuel Supply Deficiency 0 0
2019 4 04/04/2019 10:13 AM 04/04/2019 12:08 PM 1 Hours, 55 Minutes Bonneville Power Administration WECC Montana: 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
2019 4 04/07/2019 1:46 PM 04/08/2019 5:50 PM 28 Hours, 4 Minutes CenterPoint Energy TRE Texas: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 537 231956
2019 4 04/11/2019 7:48 PM 04/11/2019 8:00 PM 0 Hours, 12 Minutes Bonneville Power Administration WECC Oregon: 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
2019 4 04/12/2019 11:20 AM 04/12/2019 12:46 PM 1 Hours, 26 Minutes Xcel Energy MRO Minnesota: Martin 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
2019 4 04/13/2019 6:15 PM 04/13/2019 11:15 PM 5 Hours, 0 Minutes Entergy Corp SERC Mississippi: Arkansas: Texas: Louisiana: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 60467
2019 4 04/15/2019 4:35 AM 04/15/2019 2:40 PM 10 Hours, 5 Minutes Dominion Virginia Power SERC Virginia: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 75290
2019 4 04/18/2019 7:55 PM 04/19/2019 5:29 PM 21 Hours, 34 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 116 34695
2019 4 04/18/2019 8:08 PM 04/19/2019 11:00 AM 14 Hours, 52 Minutes Public Service Company of Colorado WECC Colorado: Clear Creek 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
2019 4 04/25/2019 6:03 PM 04/25/2019 6:32 PM 0 Hours, 29 Minutes Salt River Project WECC Arizona: Maricopa County; Firm load shedding of 100 Megawatts or more implemented under emergency operational policy.-Generation Inadequacy 150 51366
2019 4 04/26/2019 1:00 AM 04/26/2019 1:27 PM 12 Hours, 27 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 7 5830
2019 4 04/26/2019 3:16 PM 04/26/2019 3:17 PM 0 Hours, 1 Minutes ISO New England NPCC Massachusetts: Hampden County[13]; 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
2019 4 04/26/2019 5:46 PM 04/27/2019 11:49 AM 18 Hours, 3 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 54071
2019 4 04/28/2019 10:43 AM 04/29/2019 2:06 AM 15 Hours, 23 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 0 0
2019 5 05/08/2019 9:22 AM 05/08/2019 9:56 AM 0 Hours, 34 Minutes PJM Interconnection RF Pennsylvania: Mercer 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 29 1
2019 5 05/08/2019 3:50 PM 05/13/2019 12:00 AM 104 Hours, 10 Minutes Southwest Power Pool, Inc. SPP RE Louisiana: Texas: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather/Distribution Interruption Unknown 65844
2019 5 05/09/2019 5:55 PM 05/11/2019 8:50 PM 50 Hours, 55 Minutes CenterPoint Energy TRE Texas: Harris County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather 691 238015
2019 5 05/09/2019 7:06 PM 05/10/2019 2:57 AM 7 Hours, 51 Minutes CenterPoint Energy Houston Electric, LLC TRE Texas: Harris 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
2019 5 05/10/2019 2:00 AM 05/10/2019 12:15 PM 10 Hours, 15 Minutes Entergy Corp TRE Texas: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 61008
2019 5 05/18/2019 3:45 PM 05/20/2019 4:00 AM 36 Hours, 15 Minutes Oncor Electric Delivery Company LLC TRE Texas: Ector County, Midland County, Tarrant County, Dallas County, Stephens County, Anderson County, McLennan County, Ellis County, Hunt County, Young County, Bell County, Limestone County, Collin County, Rockwall County, Henderson County, Parker County, Falls County, Freestone County, Kaufman County, Grayson County, Smith County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 68000
2019 5 05/23/2019 1:11 AM 05/23/2019 12:00 PM 10 Hours, 49 Minutes Northern Indiana Pub Serv Co RF Indiana: 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
2019 5 05/23/2019 4:55 PM 05/23/2019 11:40 PM 6 Hours, 45 Minutes Dominion Energy VA SERC Virginia: Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather Unknown 100000
2019 5 05/24/2019 9:47 PM 05/24/2019 11:58 PM 2 Hours, 11 Minutes Pacific Gas & Electric Co WECC California: Electrical System Separation (Islanding) where part or parts of power grid remain(s) operational in an otherwise blocked out area or within the partial failure of an integrated electrical system-Severe Weather 20 10961
2019 5 05/27/2019 10:07 PM 05/28/2019 3:00 AM 4 Hours, 53 Minutes Dayton Power & Light Co RF Ohio: Montgomery County, Darke County, Mercer County, Miami County, Greene County; Loss of electric service to more than 50,000 customers for 1 hour or more.-Severe Weather/Transmission Interruption 347 70000

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