Power outage history
St. Clair County Alabama
9.3hours
without power for the average customer in a typical year, 2018–2025
29th most of 60 in Alabama 1.4× 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 St. Clair's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2020 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.
St. Clair, 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 |
|---|---|---|---|---|---|---|
| Oct 29, 2020 | Hurricane Zeta | 16,066 | 39% | 4.8 d | 3.4 d | 526k |
| Jan 11, 2020 | Thunderstorms | 6,665 | 16% | 41 h | 30 min | 113k |
| Jun 7, 2025 | Thunderstorms | 7,688 | 19% | 28 h | 25 h | 90k |
| Jun 28, 2018 | Thunderstorms | 7,612 | 18% | 25 h | 23 h | 60k |
| Mar 25, 2021 | Tornadoes | 6,103 | 15% | 29 h | 15 h | 59k |
| May 27, 2024 | Thunderstorms | 5,696 | 14% | 29 h | 28 h | 55k |
| Nov 30, 2022 | Thunderstorms | 5,691 | 14% | 17 h | 13 h | 50k |
| Apr 24, 2021 | Thunderstorms | 3,197 | 8% | 21 h | 19 h | 38k |
| Dec 29, 2024 | Tornadoes | 3,239 | 8% | 17 h | 17 h | 38k |
| Apr 10, 2025 | Thunderstorms | 4,791 | 12% | 20 h | 15 h | 37k |
| Apr 12, 2020 | Thunderstorms | 3,052 | 7% | 24 h | 20 h | 33k |
| Dec 8, 2017 | Winter storm | 3,608 | 9% | 17 h | 15 h | 28k |
| Feb 16, 2025 | Thunderstorms | 3,314 | 8% | 15 h | 14 h | 27k |
| Mar 19, 2018 | Tornadoes | 1,791 | 4% | 23 h | – | 25k |
| Dec 8, 2018 | No storm report | 2,038 | 5% | 23 h | – | 24k |
| Jul 21, 2022 | Thunderstorms | 3,501 | 8% | 9.5 h | 8.8 h | 22k |
| Mar 4, 2025 | Windstorm | 2,883 | 7% | 17 h | 12 h | 21k |
| Nov 25, 2025 | Thunderstorms | 2,970 | 7% | 13 h | 13 h | 21k |
| Sep 24, 2018 | No storm report | 13,900 | 34% | 6.8 h | 3.0 h | 20k |
| May 2, 2025 | Thunderstorms | 4,027 | 10% | 10 h | 3.5 h | 20k |
| Mar 3, 2023 | Thunderstorms | 4,155 | 10% | 12 h | 10 h | 19k |
| Jun 16, 2025 | Thunderstorms | 3,170 | 8% | 11 h | 9.5 h | 19k |
| May 17, 2025 | Thunderstorms | 1,469 | 4% | 16 h | – | 16k |
| Oct 3, 2023 | No storm report | 2,355 | 6% | 9.5 h | 3.5 h | 16k |
| Dec 3, 2019 | No storm report | 1,524 | 4% | 9.0 h | – | 14k |
| Aug 2, 2024 | Thunderstorms | 1,949 | 5% | 10 h | – | 13k |
| Mar 30, 2022 | No storm report | 1,252 | 3% | 16 h | – | 13k |
| Jun 20, 2019 | No storm report | 1,928 | 5% | 12 h | – | 13k |
| May 17, 2020 | No storm report | 7,314 | 18% | 4.8 h | 1.5 h | 13k |
| Apr 26, 2021 | No storm report | 1,362 | 3% | 8.8 h | – | 12k |
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 St. Clair from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 37%
- No storm on record 29%
- Tropical storm 27%
- Tornadoes 6.3%
- Windstorm 1.0%
Who keeps the lights on
Utilities serving St. Clair
As each utility reports to the Energy Information Administration for its whole Alabama territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Alabama Power Co | Investor Owned | 410 | 108 | 2.06 | 17.9 | 1.3M |
| Coosa Valley Electric Coop Inc | Cooperative | 345 | 209 | 2.43 | 16.9 | 16k |
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 41,320 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 →