Power outage history
Park County Wyoming
1.5hours
without power for the average customer in a typical year, 2018–2025
14th most of 20 in Wyoming 77% 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 Park'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 2.6 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Park, 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 |
|---|---|---|---|---|---|---|
| May 30, 2022 | Winter storm | 403 | 3% | 2.4 d | – | 15k |
| Dec 17, 2025 | Windstorm | 1,151 | 8% | 11 h | 7.5 h | 7.8k |
| Jul 1, 2023 | No storm report | 759 | 5% | 7.0 h | 7.2 h | 5.3k |
| Jan 11, 2024 | No storm report | 2,134 | 15% | 2.0 h | 2.0 h | 4.3k |
| Aug 4, 2024 | No storm report | 287 | 2% | 20 h | – | 4.0k |
| Jul 25, 2025 | No storm report | 2,206 | 16% | 2.0 h | 6.5 h | 4.0k |
| Aug 11, 2025 | No storm report | 800 | 6% | 4.8 h | 4.2 h | 3.6k |
| Nov 11, 2025 | No storm report | 1,194 | 9% | 3.0 h | 3.0 h | 3.6k |
| Oct 22, 2020 | Wildfire | 989 | 7% | 5.0 h | 3.5 h | 3.6k |
| Oct 22, 2017 | Windstorm | 917 | 7% | 5.0 h | 15 h | 3.2k |
| Nov 14, 2021 | No storm report | 660 | 5% | 4.8 h | – | 3.1k |
| Jul 17, 2022 | No storm report | 650 | 5% | 14 h | – | 3.0k |
| Apr 23, 2015 | No storm report | 325 | 2% | 9.2 h | – | 3.0k |
| Oct 12, 2023 | Winter storm | 204 | 1% | 17 h | – | 2.8k |
| Oct 24, 2021 | No storm report | 659 | 5% | 4.0 h | – | 2.6k |
| Jul 16, 2024 | No storm report | 655 | 5% | 4.0 h | – | 2.6k |
| Jan 26, 2023 | Winter storm | 754 | 5% | 4.8 h | 30 min | 2.3k |
| Feb 9, 2019 | No storm report | 586 | 4% | 9.5 h | – | 2.1k |
| Jun 8, 2023 | No storm report | 1,015 | 7% | 2.0 h | 2.2 h | 2.0k |
| Sep 3, 2024 | No storm report | 429 | 3% | 7.0 h | – | 1.9k |
| Jun 4, 2020 | No storm report | 796 | 6% | 2.2 h | 2.2 h | 1.8k |
| Jul 20, 2024 | No storm report | 1,007 | 7% | 2.5 h | 48 min | 1.8k |
| Aug 27, 2025 | No storm report | 808 | 6% | 3.0 h | 1.0 h | 1.7k |
| Oct 25, 2022 | No storm report | 270 | 2% | 7.8 h | – | 1.6k |
| May 18, 2024 | No storm report | 646 | 5% | 2.5 h | – | 1.6k |
| Oct 2, 2017 | No storm report | 440 | 3% | 3.8 h | – | 1.6k |
| Feb 22, 2023 | Winter storm | 352 | 3% | 4.5 h | – | 1.5k |
| May 16, 2015 | No storm report | 326 | 2% | 4.5 h | – | 1.5k |
| Nov 4, 2018 | No storm report | 397 | 3% | 4.0 h | – | 1.3k |
| Oct 17, 2024 | No storm report | 364 | 3% | 5.2 h | – | 1.3k |
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 Park 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 9.0%
- Wildfire 4.9%
- Thunderstorms 1.2%
Who keeps the lights on
Utilities serving Park
As each utility reports to the Energy Information Administration for its whole Wyoming territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| PacifiCorp | Investor Owned | 195 | 91 | 1.37 | 15.1 | 119k |
| City of Cody | WY | 14 | – | 1.20 | 13.2 | 37k |
| Big Horn Rural Electric Co | WY | 208 | – | 1.29 | 14.9 | 31k |
| Garland Light & Power Company | WY | – | – | – | 15.3 | 22k |
| City of Powell | WY | – | – | – | – | 18k |
| High Plains Power Inc | Cooperative | 320 | 263 | – | 14.2 | 13k |
| Beartooth Electric Coop, Inc | MT | – | – | – | 12.5 | 4.9k |
| Willwood Light & Power Company | WY | – | – | – | – | 1.1k |
| NorthWestern Energy LLC | Investor Owned | – | – | – | 12.4 | 299 |
| WAPA-- Western Area Power Administration | Federal | – | – | – | – | – |
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
- Park, MT 5.3 h
- Carbon, MT 4.9 h
- Big Horn 3.0 h
- Hot Springs 2.2 h
- Gallatin, MT 1.9 h
- Park (this county) 1.5 h
- Washakie 1.4 h
- Fremont 1.0 h
- Teton 0.9 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 14,005 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 →