Power outage history
Coryell County Texas
7.8hours
without power for the average customer in a typical year, 2018–2025
151st most of 240 in Texas 1.2× 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 Coryell's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2021 was the worst well-recorded year, at 39 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Coryell, 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 |
|---|---|---|---|---|---|---|
| Feb 14, 2021 | Winter storm | 15,160 | 57% | 6.2 d | 3.5 d | 975k |
| May 22, 2024 | Thunderstorms | 6,717 | 25% | 26 h | 35 h | 86k |
| Mar 4, 2025 | Windstorm | 2,884 | 11% | 32 h | 20 h | 29k |
| May 24, 2024 | No storm report | 3,052 | 12% | 38 h | 35 h | 29k |
| May 25, 2015 | Tornadoes | 7,140 | 27% | 3.8 h | 3.8 h | 18k |
| Jan 19, 2025 | Winter storm | 4,542 | 17% | 7.5 h | 5.8 h | 11k |
| Jan 10, 2021 | Winter storm | 1,616 | 6% | 7.0 h | 4.8 h | 10k |
| May 28, 2024 | No storm report | 2,503 | 9% | 13 h | 11 h | 9.2k |
| Jul 10, 2019 | No storm report | 1,268 | 5% | 16 h | – | 9.1k |
| Sep 24, 2025 | No storm report | 2,446 | 9% | 6.8 h | 2.5 h | 8.3k |
| Jun 24, 2019 | Flooding | 1,033 | 4% | 11 h | – | 8.1k |
| Apr 16, 2021 | No storm report | 4,539 | 17% | 2.0 h | 1.0 h | 8.0k |
| Jun 15, 2025 | No storm report | 805 | 3% | 9.2 h | – | 7.2k |
| Jun 9, 2019 | Tornadoes | 1,264 | 5% | 12 h | – | 7.2k |
| Sep 22, 2023 | No storm report | 1,117 | 4% | 6.0 h | – | 6.6k |
| May 26, 2025 | No storm report | 659 | 2% | 14 h | – | 6.4k |
| Nov 4, 2022 | No storm report | 1,025 | 4% | 7.2 h | – | 6.3k |
| Apr 17, 2019 | Thunderstorms | 1,371 | 5% | 9.8 h | 7.8 h | 5.8k |
| Mar 13, 2019 | No storm report | 4,648 | 18% | 3.2 h | 30 min | 5.7k |
| May 25, 2025 | No storm report | 2,405 | 9% | 2.2 h | 12 min | 5.4k |
| Feb 26, 2024 | No storm report | 5,078 | 19% | 1.2 h | 1.0 h | 4.9k |
| Feb 2, 2023 | Ice storm | 2,530 | 10% | 5.8 h | 2.0 h | 4.8k |
| Nov 29, 2023 | No storm report | 897 | 3% | 5.2 h | – | 4.7k |
| Jul 17, 2019 | No storm report | 960 | 4% | 7.2 h | – | 4.6k |
| Mar 21, 2022 | No storm report | 1,253 | 5% | 6.0 h | – | 4.5k |
| Feb 8, 2023 | No storm report | 1,952 | 7% | 4.0 h | 1.8 h | 4.4k |
| Oct 24, 2022 | No storm report | 675 | 3% | 10 h | – | 4.4k |
| May 8, 2024 | No storm report | 4,559 | 17% | 1.2 h | 48 min | 4.3k |
| Oct 28, 2021 | No storm report | 1,105 | 4% | 8.5 h | – | 4.2k |
| Oct 29, 2025 | No storm report | 525 | 2% | 11 h | – | 3.7k |
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 Coryell from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Winter storm 72%
- No storm on record 16%
- Thunderstorms 7.0%
- Windstorm 2.1%
- Heat 1.0%
- Flooding 0.6%
- Tornadoes 0.5%
Who keeps the lights on
Utilities serving Coryell
As each utility reports to the Energy Information Administration for its whole Texas territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| United Electric Coop Service Inc | Cooperative | 122 | 72 | 1.23 | 13.9 | 91k |
| Hamilton County Elec Coop Assn | Cooperative | – | – | – | 12.6 | 20k |
| Heart of Texas Electric Coop | Cooperative | 204 | 134 | 1.83 | 11.9 | 18k |
| Texas-New Mexico Power Co | Investor Owned | 165 | 119 | 1.50 | – | – |
| Oncor Electric Delivery Company LLC | Investor Owned | 232 | 67 | 1.55 | – | – |
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 26,485 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 →