Power Out Map
– 0 customers out in Tennessee

Power outage history

Tennessee

5.2hours

without power for the average customer in a typical year, 2018–2025. 27th of 51.

Largest outage on record Windstorm, March 3, 2023 352,705 customers out · 10% of the state
Electricity customers 3,538,697 Across 95 counties
Worst well-recorded year 2023 11 hours without power, average customer

County by county

Where Tennessee goes dark

Hours without power for the average customer in a typical year. Hover a county; click to open it.

Fewer hours64+ h / yr

Most hours without power

  1. 1Shelby15 h
  2. 2Pickett15 h
  3. 3Stewart14 h
  4. 4Grundy13 h
  5. 5Henry12 h
  6. 6Meigs11 h
  7. 7Clay11 h
  8. 8Fentress11 h
  9. 9Polk10 h
  10. 10Hancock10 h

Most reliable

  1. 1DeKalb0.3 h
  2. 2Putnam0.4 h
  3. 3Unicoi0.7 h
  4. 4Henderson0.8 h
  5. 5Morgan0.8 h

Year by year

Hours in the dark, statewide

0 2 4 6 8 10 12 ’15 ’16 ’17 1.9 ’18 2.5 ’19 6.2 ’20 3.5 ’21 8.6 ’22 11 ’23 4.6 ’24 4.0 ’25 US 6.6

The record

Tennessee's largest outages

Statewide events with at least 2% of customers, or 25,000, out at once, by peak.

BeganStormPeak outShare
Mar 3, 2023 Windstorm 352,705 10.0%
Dec 24, 2022 Winter storm 236,220 6.7%
May 3, 2020 Windstorm 225,589 6.4%
May 27, 2017 Thunderstorms 187,775 5.3%
Dec 23, 2022 Winter storm 176,703 5.0%
Dec 11, 2021 Tornadoes 151,855 4.3%
Feb 3, 2022 Ice storm 151,830 4.3%
Jul 18, 2023 Thunderstorms 147,856 4.2%
Jun 25, 2023 Thunderstorms 144,788 4.1%
Aug 7, 2023 Thunderstorms 135,254 3.8%
Sep 27, 2024 Hurricane Helene 128,592 3.6%
Apr 1, 2023 Windstorm 102,838 2.9%

Every county

All 95 counties

CountyHours / yrMajor outages since 2018Customers
Shelby 15 5 422,904
Pickett 15 85 2,876
Stewart 14 128 5,144
Grundy 13 34 7,160
Henry 12 41 22,032
Meigs 11 81 6,967
Clay 11 98 4,055
Fentress 11 93 10,685
Polk 10 36 9,762
Hancock 10 50 4,277
Bledsoe 9.8 25 7,566
Cumberland 9.7 31 36,171
Sevier 9.6 11 71,320
Union 9.2 51 9,474
Giles 8.7 58 16,388
Hawkins 8.7 31 26,527
Tipton 8.5 34 21,417
Fayette 8.3 30 22,058
Cheatham 7.4 44 15,430
Moore 7.1 53 3,269
Davidson 7.1 10 359,052
Bradley 6.9 13 54,499
Crockett 6.7 68 6,207
Macon 6.6 54 13,771
Grainger 6.3 29 12,567

Who keeps the lights on

Utilities in Tennessee

Reliability and residential price as reported to the EIA for the latest year. Outage minutes include major storm days.

UtilityTypeOutage min / yrExcl. major storms¢/kWhCustomers
Nashville Electric Service Municipal 0 83 14.0 425k
City of Memphis Municipal 349 283 13.2 385k
Middle Tennessee E M C Cooperative 50 48 12.5 312k
Knoxville Utilities Board Municipal 274 149 13.8 197k
City of Chattanooga Municipal – – 12.9 165k
Volunteer Electric Coop Cooperative – – 13.1 105k
Cumberland Elec Member Corp Cooperative 221 171 13.8 102k
City of Clarksville Municipal 117 101 13.7 78k
Johnson City Municipal 101 100 13.2 73k
Duck River Elec Member Corp Cooperative 190 134 13.6 72k
City of Lenoir Municipal – – 12.8 63k
Upper Cumberland E M C Cooperative – – 13.7 46k
Appalachian Electric Coop Cooperative 301 215 13.6 44k
Southwest Tennessee E M C Cooperative – – 13.7 44k
Kingsport Power Co Investor Owned 182 158 12.3 43k