Power outage history
Power County Idaho
18hours
without power for the average customer in a typical year, 2018–2025
2.8× 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 Power'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 27 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Power, 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 |
|---|---|---|---|---|---|---|
| Dec 17, 2025 | Windstorm | 2,599 | 68% | 4.1 d | 25 h | 58k |
| May 30, 2020 | No storm report | 1,859 | 48% | 48 h | 2.3 d | 43k |
| Mar 18, 2017 | Flooding | 594 | 15% | 2.4 d | 2.4 d | 33k |
| Sep 7, 2020 | Windstorm | 1,777 | 46% | 30 h | 23 h | 18k |
| Sep 14, 2017 | No storm report | 3,057 | 80% | 6.0 h | 2.0 h | 18k |
| Sep 16, 2025 | No storm report | 1,932 | 50% | 9.0 h | 8.8 h | 17k |
| Jun 25, 2022 | No storm report | 1,788 | 47% | 13 h | 9.0 h | 16k |
| Aug 13, 2020 | No storm report | 1,859 | 48% | 5.2 h | 5.2 h | 9.8k |
| Dec 18, 2020 | No storm report | 3,598 | 94% | 2.8 h | 2.8 h | 8.0k |
| Mar 2, 2024 | Winter storm | 564 | 15% | 25 h | 11 h | 6.4k |
| May 28, 2022 | No storm report | 1,754 | 46% | 3.8 h | 3.8 h | 6.2k |
| Sep 8, 2021 | No storm report | 3,269 | 85% | 2.0 h | 2.0 h | 6.0k |
| Nov 13, 2020 | Winter storm | 1,141 | 30% | 6.5 h | 6.5 h | 5.9k |
| Mar 17, 2017 | Flooding | 597 | 16% | 9.8 h | 9.8 h | 5.8k |
| Apr 30, 2025 | No storm report | 1,885 | 49% | 3.0 h | 3.0 h | 5.7k |
| Oct 14, 2025 | No storm report | 3,827 | 100% | 1.8 h | 1.8 h | 4.9k |
| Dec 15, 2021 | Windstorm | 3,225 | 84% | 5.8 h | 2.0 h | 4.2k |
| Jun 30, 2022 | No storm report | 717 | 19% | 6.5 h | 5.2 h | 3.9k |
| Oct 14, 2016 | No storm report | 510 | 13% | 7.2 h | 6.2 h | 3.1k |
| Aug 23, 2024 | Thunderstorms | 2,640 | 69% | 2.5 h | 1.8 h | 3.1k |
| May 28, 2025 | No storm report | 593 | 15% | 6.5 h | 19 h | 3.0k |
| May 12, 2020 | No storm report | 790 | 21% | 4.0 h | 5.2 h | 3.0k |
| Aug 21, 2021 | No storm report | 1,745 | 45% | 3.8 h | 1.0 h | 2.8k |
| Nov 4, 2024 | No storm report | 3,842 | 100% | 4.5 h | 12 min | 2.3k |
| Jul 23, 2023 | Thunderstorms | 1,535 | 40% | 1.5 h | 48 min | 2.3k |
| May 8, 2025 | No storm report | 390 | 10% | 5.8 h | 5.8 h | 2.2k |
| Dec 7, 2022 | No storm report | 1,875 | 49% | 1.8 h | 30 min | 2.2k |
| Sep 28, 2022 | Heat | 1,830 | 48% | 3.2 h | 2.8 h | 2.2k |
| Oct 27, 2022 | No storm report | 1,832 | 48% | 3.8 h | 3.8 h | 2.1k |
| Oct 24, 2020 | No storm report | 1,146 | 30% | 2.2 h | 48 min | 1.8k |
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 Power from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 61%
- Windstorm 28%
- Winter storm 6.7%
- Thunderstorms 2.3%
- Heat 1.6%
- Wildfire 0.5%
Who keeps the lights on
Utilities serving Power
As each utility reports to the Energy Information Administration for its whole Idaho territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Idaho Power Co | Investor Owned | 171 | 141 | 1.03 | 11.8 | 540k |
| PacifiCorp | Investor Owned | 146 | 146 | 1.16 | 13.5 | 76k |
| Raft Rural Elec Coop Inc | Cooperative | – | – | – | 10.2 | 1.4k |
| Bonneville 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.
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 3,842 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 →