Power outage history
Cumberland County Tennessee
9.7hours
without power for the average customer in a typical year, 2018–2025
12th most of 73 in Tennessee 1.5× the national median
Every day since 2015
Eleven years, one night at a time
Each cell is a day. The brighter it is, the larger the share of Cumberland's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2025 was the worst well-recorded year, at 21 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Cumberland, hours without power per customer
The record
The biggest outages since 2015
Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.
| Began | Storm | Peak out | Share | Lasted | 90% restored | Customer-hours |
|---|---|---|---|---|---|---|
| Mar 4, 2025 | Windstorm | 11,605 | 32% | 44 h | 35 h | 199k |
| Aug 7, 2023 | Thunderstorms | 7,369 | 20% | 2.3 d | 1.2 h | 133k |
| Mar 15, 2025 | Flooding | 14,944 | 41% | 25 h | 12 h | 118k |
| Jan 17, 2025 | No storm report | 3,402 | 9% | 34 h | 11 h | 116k |
| Mar 29, 2020 | Thunderstorms | 9,818 | 27% | 43 h | 30 h | 112k |
| Aug 12, 2023 | No storm report | 11,309 | 31% | 15 h | 12 h | 107k |
| Jan 29, 2025 | No storm report | 2,517 | 7% | 40 h | 30 min | 98k |
| Nov 19, 2024 | No storm report | 3,641 | 10% | 29 h | 26 h | 98k |
| May 27, 2024 | No storm report | 19,101 | 53% | 3.8 h | 1.0 h | 69k |
| May 30, 2020 | No storm report | 11,466 | 32% | 5.2 h | 1.8 h | 60k |
| Oct 27, 2023 | No storm report | 11,067 | 31% | 6.2 h | 6.2 h | 58k |
| Jan 21, 2024 | No storm report | 10,304 | 28% | 7.5 h | 12 min | 47k |
| Mar 3, 2023 | Windstorm | 5,904 | 16% | 24 h | 16 h | 44k |
| Oct 26, 2019 | No storm report | 12,709 | 35% | 9.0 h | 5.0 h | 41k |
| Feb 7, 2021 | Winter storm | 3,817 | 11% | 20 h | 13 h | 40k |
| May 20, 2025 | Tornadoes | 3,313 | 9% | 16 h | 13 h | 25k |
| Dec 18, 2025 | No storm report | 3,873 | 11% | 10 h | 7.0 h | 22k |
| Jan 11, 2020 | Thunderstorms | 2,879 | 8% | 20 h | 11 h | 21k |
| Feb 12, 2020 | Thunderstorms | 3,522 | 10% | 10 h | 9.5 h | 17k |
| Dec 23, 2022 | Winter storm | 1,729 | 5% | 14 h | – | 16k |
| Jun 6, 2022 | No storm report | 9,272 | 26% | 2.0 h | 1.2 h | 16k |
| Apr 1, 2023 | Thunderstorms | 5,738 | 16% | 6.2 h | 5.5 h | 16k |
| Nov 18, 2024 | No storm report | 10,165 | 28% | 1.5 h | 1.5 h | 15k |
| Feb 16, 2025 | Windstorm | 3,103 | 9% | 13 h | 11 h | 14k |
| Mar 16, 2024 | No storm report | 3,394 | 9% | 7.2 h | 6.2 h | 13k |
| Dec 28, 2023 | No storm report | 2,125 | 6% | 6.5 h | 5.2 h | 13k |
| Nov 4, 2022 | No storm report | 3,032 | 8% | 4.2 h | 4.5 h | 13k |
| May 23, 2024 | No storm report | 19,122 | 53% | 48 min | 30 min | 12k |
| Nov 16, 2019 | No storm report | 7,216 | 20% | 2.5 h | 2.2 h | 11k |
| Jun 9, 2025 | No storm report | 2,795 | 8% | 13 h | 13 h | 11k |
After the peak
How fast the lights come back
Each line is one major outage, from its peak. The amber line is the typical path.
When it happens
The outage clock
Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.
What was happening
Weather behind the outages
Each outage is matched to NOAA storm reports for Cumberland from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 61%
- Thunderstorms 16%
- Windstorm 12%
- Flooding 5.8%
- Winter storm 3.4%
- Tornadoes 1.2%
- Tropical storm 0.6%
Who keeps the lights on
Utilities serving Cumberland
As each utility reports to the Energy Information Administration for its whole Tennessee territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Volunteer Electric Coop | Cooperative | 685 | 436 | 5.80 | 13.1 | 105k |
EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.
About these numbers
Notes
Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 36,171 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →