Power outage history
Dallam County Texas
2.5hours
without power for the average customer in a typical year, 2018–2025
227th most of 240 in Texas 61% below 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 Dallam'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 5.2 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Dallam, 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 |
|---|---|---|---|---|---|---|
| Apr 30, 2017 | Winter storm | 781 | 20% | 39 h | 24 h | 18k |
| Jan 20, 2021 | No storm report | 860 | 22% | 16 h | 12 h | 14k |
| Oct 28, 2020 | Winter storm | 2,118 | 55% | 4.0 h | 1.0 h | 8.5k |
| Jan 11, 2025 | No storm report | 433 | 11% | 13 h | 13 h | 3.9k |
| Sep 17, 2025 | Thunderstorms | 924 | 24% | 3.8 h | 3.8 h | 3.4k |
| Dec 27, 2018 | Winter storm | 1,713 | 44% | 18 h | 3.2 h | 3.0k |
| Sep 2, 2017 | No storm report | 1,715 | 44% | 4.5 h | 30 min | 3.0k |
| Mar 13, 2019 | Windstorm | 153 | 4% | 20 h | – | 2.6k |
| Dec 19, 2015 | No storm report | 1,546 | 40% | 5.8 h | 5.0 h | 2.3k |
| Jul 19, 2024 | No storm report | 1,447 | 37% | 6.2 h | 1.2 h | 2.1k |
| Jun 15, 2022 | No storm report | 2,595 | 67% | 48 min | 9.8 h | 1.9k |
| May 16, 2022 | No storm report | 1,881 | 48% | 7.0 h | 2.5 h | 1.8k |
| May 26, 2015 | No storm report | 1,157 | 30% | 1.2 h | 12 h | 1.4k |
| Jan 13, 2021 | No storm report | 860 | 22% | 1.2 h | 1.0 h | 1.1k |
| Feb 23, 2019 | Windstorm | 326 | 8% | 6.5 h | 5.0 h | 986 |
| Feb 26, 2023 | Windstorm | 262 | 7% | 6.0 h | 1.2 h | 906 |
| Aug 23, 2018 | No storm report | 218 | 6% | 5.2 h | 3.2 h | 739 |
| Jan 30, 2021 | No storm report | 134 | 3% | 8.5 h | – | 656 |
| Apr 4, 2025 | No storm report | 470 | 12% | 4.0 h | 1.0 h | 642 |
| Aug 6, 2025 | No storm report | 241 | 6% | 5.0 h | 1.5 h | 636 |
| Mar 26, 2016 | No storm report | 425 | 11% | 2.0 h | 1.2 h | 636 |
| Jul 29, 2016 | Thunderstorms | 187 | 5% | 5.8 h | – | 614 |
| Dec 2, 2018 | No storm report | 219 | 6% | 2.8 h | 2.5 h | 590 |
| Jul 14, 2024 | No storm report | 482 | 12% | 2.0 h | 1.5 h | 567 |
| Mar 18, 2018 | No storm report | 76 | 2% | 9.2 h | – | 562 |
| Jun 8, 2021 | No storm report | 98 | 3% | 6.2 h | – | 554 |
| Mar 4, 2025 | Windstorm | 174 | 4% | 5.8 h | – | 510 |
| Nov 7, 2023 | No storm report | 99 | 3% | 5.2 h | – | 462 |
| Aug 23, 2019 | No storm report | 219 | 6% | 2.5 h | 1.2 h | 454 |
| Jun 24, 2022 | No storm report | 534 | 14% | 1.0 h | 3.5 h | 434 |
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 Dallam from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 65%
- Winter storm 19%
- Windstorm 9.3%
- Thunderstorms 6.6%
Who keeps the lights on
Utilities serving Dallam
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 |
|---|---|---|---|---|---|---|
| Southwestern Public Service Co | Investor Owned | 441 | 151 | 1.71 | 13.9 | 224k |
| Rita Blanca Electric Coop, Inc | Cooperative | 885 | 159 | 4.12 | 8.4 | 1.2k |
| Tri-County Electric Coop, Inc (OK) | Cooperative | – | – | – | 15.6 | 220 |
| Southwestern Electric Coop Inc | Cooperative | – | – | – | 23.3 | 11 |
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.
Next door
Neighbouring counties
- Cimarron, OK 12 h
- Moore 11 h
- Sherman 5.6 h
- Hartley 3.0 h
- Dallam (this county) 2.5 h
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 3,881 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 →