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Electric Power Monthly

Data for July 2018  |  Release Date: September 25, 2018  |  Next Release: October 24, 2018 
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SAS Output
Table B.1 Major Disturbances and Unusual Occurrences, Year-to-Date 2018

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
2018 1 01/01/2018 5:43 PM . . . Hours, . Minutes American Electric Power - Texas TRE Texas: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-Severe Weather Unknown Unknown
2018 1 01/01/2018 6:21 PM 01/02/2018 6:11 PM 23 Hours, 50 Minutes Tennessee Valley Authority SERC Tennessee: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-Severe Weather Unknown Unknown
2018 1 01/01/2018 9:37 PM 01/02/2018 10:30 AM 12 Hours, 53 Minutes Memphis Light Gas and Water Division SERC Tennessee: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-System Operations Unknown Unknown
2018 1 01/02/2018 6:45 AM 01/02/2018 9:00 AM 2 Hours, 15 Minutes Duke Energy Progress SERC North Carolina: South Carolina: System-wide voltage reductions of 3 percent or more-Severe Weather 14998 Unknown
2018 1 01/02/2018 7:30 AM . . . Hours, . Minutes South Carolina Electric and Gas SERC South Carolina: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-Severe Weather 0 717000
2018 1 01/02/2018 10:00 AM 02/12/2018 8:00 AM 982 Hours, 0 Minutes Somerset Operating Company, LLC NPCC New York: Niagara County; Fuel supply emergencies that could impact electric power system adequacy or reliability-Fuel Supply Deficiency 675 Unknown
2018 1 01/15/2018 4:20 AM 01/18/2018 5:48 AM 73 Hours, 28 Minutes American Electric Power - Texas TRE Texas: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-Severe Weather Unknown Unknown
2018 1 01/16/2018 1:57 PM 01/16/2018 2:32 PM 0 Hours, 35 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-Severe Weather Unknown Unknown
2018 1 01/16/2018 3:00 PM 01/18/2018 1:00 PM 46 Hours, 0 Minutes Memphis Light Gas and Water Division SERC Tennessee: Shelby County; Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-System Operations Unknown Unknown
2018 1 01/16/2018 3:00 PM 01/18/2018 1:00 PM 46 Hours, 0 Minutes Tennessee Valley Authority SERC Tennessee: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-Severe Weather Unknown Unknown
2018 1 01/17/2018 5:10 AM 01/17/2018 1:00 PM 7 Hours, 50 Minutes Cooperative Energy SERC Mississippi: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-System Operations 1788 420000
2018 1 01/17/2018 6:10 AM 01/17/2018 2:00 PM 7 Hours, 50 Minutes Louisiana Generating LLC SERC Louisiana: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-System Operations Unknown Unknown
2018 1 01/18/2018 5:00 AM 01/18/2018 9:45 AM 4 Hours, 45 Minutes Cooperative Energy SERC Mississippi: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-System Operations 1760 420000
2018 1 01/18/2018 5:00 AM 01/18/2018 11:00 AM 6 Hours, 0 Minutes Entergy Services, Inc. SERC Arkansas: Mississippi: Louisiana: Texas: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-Severe Weather 31500 Unknown
2018 1 01/18/2018 6:00 AM . . . Hours, . Minutes Louisiana Generating LLC SERC Louisiana: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-System Operations Unknown Unknown
2018 2 02/08/2018 1:25 PM 02/08/2018 1:31 PM 0 Hours, 6 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 30 10900
2018 3 03/01/2018 11:43 AM 03/01/2018 11:56 AM 0 Hours, 13 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-Severe Weather 38 10898
2018 3 03/01/2018 9:57 PM 03/02/2018 10:14 AM 12 Hours, 17 Minutes The Illuminating Company RF Ohio: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 86501
2018 3 03/01/2018 10:20 PM 03/04/2018 8:00 PM 69 Hours, 40 Minutes Detroit Edison Co RF Michigan: Wayne County, Washtenaw County, Oakland County, Macomb County, Monroe County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 95000
2018 3 03/02/2018 7:00 AM . . . Hours, . Minutes Central Hudson Gas & Elec Corp NPCC New York: Dutchess County, Orange County, Greene County, Ulster County, Putnam County, Sullivan County, Albany County, Columbia County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 90000
2018 3 03/02/2018 8:00 AM 03/03/2018 11:00 PM 39 Hours, 0 Minutes American Electric Power - (RFC Reliability Region) (8400 Smiths Mill Road, New Albany Ohio 43054) RF Virginia: West Virginia: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 65198
2018 3 03/02/2018 8:42 AM . . . Hours, . 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 63331
2018 3 03/02/2018 11:34 AM . . . Hours, . Minutes New York State Electric & Gas NPCC New York: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 50000
2018 3 03/02/2018 11:58 AM . . . Hours, . Minutes PPL Electric Utilities Corp RF Pennsylvania: Berks County, Bucks County, Carbon County, Chester County, Clinton County, Columbia County, Cumberland County, Dauphin County, Juniata County, Lackawanna County, Lancaster County, Lebanon County, Lehigh County, Luzerne County, Lycoming County, Monroe County, Montgomery County, Montour County, Northampton County, Northumberland County, Pike County, Schuylkill County, Snyder County; 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 Unknown 126000
2018 3 03/02/2018 12:00 PM . . . Hours, . Minutes Baltimore Gas and Electric RF Maryland: Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-Severe Weather 670 474019
2018 3 03/02/2018 12:00 PM 03/05/2018 12:00 AM 60 Hours, 0 Minutes Exelon Corporation/PECO RF Pennsylvania: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 630000
2018 3 03/02/2018 1:51 PM 03/04/2018 12:11 PM 46 Hours, 20 Minutes Metropolitan Edison Co RF Pennsylvania: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 233136
2018 3 03/02/2018 1:51 PM 03/05/2018 1:18 PM 71 Hours, 27 Minutes ISO New England NPCC Connecticut: Massachusetts: Rhode Island: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 325000
2018 3 03/02/2018 3:10 PM 03/06/2018 4:57 AM 85 Hours, 47 Minutes Jersey Central Power & Lt Co RF Ohio: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 249322
2018 3 03/02/2018 3:46 PM 03/04/2018 7:46 PM 52 Hours, 0 Minutes Consolidated Edison Co-NY Inc NPCC New York: New York County, Westchester County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 72353
2018 3 03/02/2018 5:00 PM 03/06/2018 11:00 AM 90 Hours, 0 Minutes Delmarva Power & Light Company RF Delaware: Maryland: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 60000
2018 3 03/07/2018 12:00 PM 03/07/2018 5:00 PM 5 Hours, 0 Minutes Exelon Corporation/PECO RF Pennsylvania: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 120000
2018 3 03/07/2018 4:10 PM 03/10/2018 11:32 AM 67 Hours, 22 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 216800
2018 3 03/07/2018 5:15 PM . . . Hours, . 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 50 58000
2018 3 03/07/2018 7:37 PM 03/10/2018 4:35 PM 68 Hours, 58 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 102000
2018 3 03/13/2018 8:50 AM 03/14/2018 11:22 PM 38 Hours, 32 Minutes ISO New England NPCC Massachusetts: Rhode Island: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 123629
2018 3 03/19/2018 11:29 PM 03/20/2018 3:37 AM 4 Hours, 8 Minutes Southern Company SERC Alabama: Georgia: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 261 78220
2018 3 03/20/2018 7:00 PM 03/25/2018 6:30 AM 107 Hours, 30 Minutes Atlantic City Electric Co RF New Jersey: Atlantic County, Camden County, Cape May County, Gloucester County, Salem County, Cumberland County, Burlington County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 80 124000
2018 3 03/24/2018 10:30 PM 03/26/2018 8:00 PM 45 Hours, 30 Minutes American Electric Power - (RFC Reliability Region) (8400 Smiths Mill Road, New Albany Ohio 43054) RF Virginia: West Virginia: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 81227
2018 4 04/04/2018 4:42 PM 04/07/2018 6:22 AM 61 Hours, 40 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 72896
2018 4 04/05/2018 12:50 AM 04/05/2018 4:00 PM 15 Hours, 10 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 65932
2018 4 04/09/2018 11:16 AM . . . Hours, . Minutes Peak Reliability WECC Utah: Uncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incident-Transmission Interruption 300 250000
2018 4 04/09/2018 12:16 PM 04/09/2018 1:52 PM 1 Hours, 36 Minutes Pacificorp WECC Utah: Salt Lake County; Uncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incident-Transmission Interruption 806 57000
2018 4 04/14/2018 9:30 AM 04/14/2018 10:00 AM 0 Hours, 30 Minutes Entergy Corp SERC Louisiana: Arkansas: Mississippi: Texas: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 56350
2018 4 04/15/2018 7:30 AM 04/18/2018 7:30 AM 72 Hours, 0 Minutes DTE Energy RF Michigan: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 389591
2018 4 04/15/2018 5:14 PM 04/15/2018 11:25 PM 6 Hours, 11 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 78100
2018 5 05/04/2018 12:00 PM 05/06/2018 1:00 PM 49 Hours, 0 Minutes DTE Energy RF Michigan: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 300000
2018 5 05/04/2018 2:00 PM 05/05/2018 9:30 AM 19 Hours, 30 Minutes Consumers Energy Co RF Michigan: Calhoun County, Genesee County, Ingham County, Kent County, Macomb County, Midland County, Saginaw County, Gratiot County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 90000
2018 5 05/04/2018 8:10 PM . . . Hours, . 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 106150
2018 5 05/04/2018 11:10 PM 05/05/2018 12:40 AM 1 Hours, 30 Minutes ISO New England NPCC New Hampshire: Vermont: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 56000
2018 5 05/05/2018 4:30 AM 05/05/2018 3:30 PM 11 Hours, 0 Minutes ISO New England NPCC Vermont: New Hampshire: Maine: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 31900
2018 5 05/14/2018 7:08 PM . . . Hours, . Minutes Dominion Energy VA SERC Virginia: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 112000
2018 5 05/15/2018 2:50 PM . . . Hours, . Minutes PPL Electric Utilities Corp RF Pennsylvania: Lehigh County, Schuylkill County, Cumberland County, Lancaster County, Northampton County, Berks County, Clinton County, Susquehanna County, Bucks County, Carbon County, Chester County, Columbia County, Juniata County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 114000
2018 5 05/15/2018 4:00 PM . . . Hours, . Minutes Central Hudson Gas & Electric NPCC New York: Dutchess County, Ulster County, Orange County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 72000
2018 5 05/15/2018 5:15 PM . . . Hours, . Minutes New York State Electric & Gas NPCC New York: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 49999
2018 5 05/15/2018 5:25 PM . . . Hours, . 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 82372
2018 5 05/15/2018 6:14 PM 05/15/2018 7:00 PM 0 Hours, 46 Minutes Metropolitan Edison Co RF Pennsylvania: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 52872
2018 5 05/15/2018 6:35 PM 05/18/2018 3:57 PM 69 Hours, 22 Minutes ISO New England NPCC Connecticut: Massachusetts: Rhode Island: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 120000
2018 5 05/17/2018 1:11 AM . . . Hours, . Minutes Peak Reliability WECC California: Contra Costa County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 70 70000
2018 5 05/17/2018 1:11 AM 05/18/2018 12:38 AM 23 Hours, 27 Minutes Pacific Gas & Electric Co WECC California: Loss of electric service to more than 50,000 customers for 1 hour or more-Transmission Disruption 124 70000
2018 5 05/26/2018 6:40 PM 05/27/2018 11:50 PM 29 Hours, 10 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 163932
2018 6 06/02/2018 5:00 AM 06/02/2018 11:00 AM 6 Hours, 0 Minutes Kansas City Power & Light Co. SPP RE Missouri: Jackson County, Clay County, Platte County, Andrew County; Kansas: Johnson County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 103535
2018 6 06/18/2018 6:20 PM 06/19/2018 12:15 AM 5 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 112927
2018 6 06/20/2018 10:58 PM 06/21/2018 6:05 AM 7 Hours, 7 Minutes Lake Worth Utilities FRCC Florida: Palm Beach County; Complete operational failure or shut-down of the transmission and/or distribution of electrical system-Transmission Interruption 73 27000
2018 6 06/22/2018 2:38 PM . . . Hours, . Minutes Peak Reliability WECC Washington: 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 10000 4200000
2018 6 06/28/2018 2:50 PM 06/29/2018 9:00 AM 18 Hours, 10 Minutes Southern Company SERC Alabama: Georgia: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 160 48109
2018 6 06/28/2018 6:36 PM 07/01/2018 7:00 AM 60 Hours, 24 Minutes Ameren Missouri SERC Missouri: Illinois: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 112000
2018 6 06/29/2018 7:35 AM 06/29/2018 9:30 AM 1 Hours, 55 Minutes Minnesota Power MRO Minnesota: St. Louis County; Uncontrolled loss of 300 Megawatts or more of firm system loads for 15 minutes or more from a single incident-Severe Weather 350 Unknown
2018 7 07/11/2018 12:58 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
2018 7 07/11/2018 3:40 PM 07/11/2018 4:00 PM 0 Hours, 20 Minutes Tennessee Valley Authority SERC Tennessee: Uncontrolled loss of 300 Megawatts or more of firm system loads for 15 minutes or more from a single incident-Transmission Interruption 425 26195
2018 7 07/16/2018 5:15 AM . . . Hours, . Minutes California Department of Water Resources WECC California: Merced County; Fuel supply emergencies that could impact electric power system adequacy or reliability-Fuel Supply Deficiency 0 0
2018 7 07/18/2018 4:00 AM . . . Hours, . 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
2018 7 07/18/2018 5:28 PM 07/18/2018 5:31 PM 0 Hours, 3 Minutes Bonneville Power Administration WECC Oregon: 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.-Severe Weather/Transmission Interruption Unknown Unknown
2018 7 07/20/2018 4:19 PM 07/20/2018 4:48 PM 0 Hours, 29 Minutes Tennessee Valley Authority SERC Kentucky: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 87833
2018 7 07/21/2018 4:45 AM 07/21/2018 11:15 AM 6 Hours, 30 Minutes Entergy Corp SERC Arkansas: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 64930
2018 7 07/21/2018 7:20 AM 07/21/2018 11:30 AM 4 Hours, 10 Minutes Southern Company SERC Georgia: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 143 42901
2018 7 07/23/2018 4:16 AM 07/23/2018 4:29 AM 0 Hours, 13 Minutes Duke Energy Florida FRCC Florida: Pinellas 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 40 Unknown
2018 7 07/26/2018 8:24 PM . . . Hours, . Minutes Redding Electric Utility WECC California: Shasta County; Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the Bulk Electric System-Natural Disaster Unknown Unknown
2018 7 07/27/2018 9:34 AM 07/27/2018 9:51 AM 0 Hours, 17 Minutes Peak Reliability WECC Washington: Clark County; 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-System Operations Unknown Unknown
2018 7 07/27/2018 4:28 PM 07/27/2018 4:33 PM 0 Hours, 5 Minutes Consolidated Edison Co-NY Inc NPCC New York: New 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).-Severe Weather/Transmission Interruption 0 0
2018 7 07/29/2018 2:33 PM 07/29/2018 6:23 PM 3 Hours, 50 Minutes Pacific Gas & Electric Co WECC California: Loss of electric service to more than 50,000 customers for 1 hour or more-Natural Disaster 83 57670
2018 7 07/30/2018 6:30 AM 07/30/2018 11:00 PM 16 Hours, 30 Minutes Arizona Public Service Co WECC Arizona: Maricopa County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 82000

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