Power outage history
Platte County Wyoming
2.3hours
without power for the average customer in a typical year, 2018–2025
65% 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 Platte'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 2.7 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Platte, 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 |
|---|---|---|---|---|---|---|
| Sep 8, 2020 | Winter storm | 367 | 8% | 17 h | 14 h | 4.7k |
| Dec 17, 2025 | Windstorm | 459 | 10% | 18 h | 18 h | 3.0k |
| Oct 9, 2020 | No storm report | 408 | 9% | 6.0 h | 6.0 h | 2.4k |
| Apr 23, 2022 | Winter storm | 422 | 10% | 6.2 h | 3.5 h | 2.3k |
| Jan 13, 2021 | Windstorm | 295 | 7% | 6.0 h | 5.2 h | 1.7k |
| Sep 3, 2020 | No storm report | 294 | 7% | 5.5 h | 6.8 h | 1.6k |
| Jul 10, 2018 | No storm report | 394 | 9% | 4.0 h | 5.0 h | 1.5k |
| Nov 13, 2025 | No storm report | 347 | 8% | 3.8 h | 3.0 h | 1.3k |
| Jun 6, 2020 | Thunderstorms | 401 | 9% | 3.0 h | 3.0 h | 1.2k |
| Aug 3, 2018 | No storm report | 332 | 8% | 3.0 h | 3.0 h | 996 |
| Sep 24, 2019 | No storm report | 120 | 3% | 7.0 h | – | 837 |
| Nov 15, 2024 | No storm report | 330 | 8% | 2.2 h | 2.2 h | 742 |
| Aug 18, 2019 | No storm report | 684 | 16% | 1.2 h | 12 min | 706 |
| Jul 11, 2018 | No storm report | 394 | 9% | 1.5 h | 1.5 h | 591 |
| Jul 17, 2021 | No storm report | 301 | 7% | 1.8 h | 1.8 h | 527 |
| Sep 6, 2019 | No storm report | 329 | 7% | 1.5 h | 30 min | 492 |
| Aug 16, 2022 | No storm report | 57 | 1% | 7.2 h | – | 408 |
| Mar 13, 2019 | Winter storm | 84 | 2% | 5.2 h | – | 384 |
| Nov 21, 2023 | No storm report | 383 | 9% | 1.0 h | 1.0 h | 383 |
| Jul 20, 2024 | No storm report | 55 | 1% | 5.8 h | – | 316 |
| Apr 4, 2019 | No storm report | 398 | 9% | 48 min | 48 min | 298 |
| Mar 22, 2019 | No storm report | 398 | 9% | 48 min | 48 min | 298 |
| May 11, 2020 | No storm report | 108 | 2% | 2.5 h | – | 264 |
| Nov 30, 2019 | Winter storm | 59 | 1% | 5.8 h | – | 250 |
| Jul 4, 2025 | No storm report | 56 | 1% | 4.2 h | – | 238 |
| Dec 19, 2025 | Windstorm | 59 | 1% | 3.8 h | – | 221 |
| Sep 27, 2019 | No storm report | 231 | 5% | 1.0 h | 48 min | 218 |
| May 22, 2018 | No storm report | 393 | 9% | 30 min | 30 min | 196 |
| Sep 7, 2019 | No storm report | 328 | 7% | 30 min | 30 min | 164 |
| Jul 24, 2019 | No storm report | 327 | 7% | 30 min | 30 min | 164 |
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 Platte from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 54%
- Winter storm 25%
- Windstorm 17%
- Thunderstorms 4.2%
Who keeps the lights on
Utilities serving Platte
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 |
| Wyrulec Company | WY | 692 | 164 | 1.80 | 15.4 | 31k |
| Wheatland Rural Elec Assn, Inc | WY | – | – | – | – | 28k |
| Town of Wheatland | WY | – | – | – | – | 13k |
| Niobrara Electric Assn, Inc | WY | 1,018 | 603 | – | – | 10k |
| Town of Guernsey | WY | – | – | – | – | 4.8k |
| 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
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 4,390 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 →