Power outage history
Bonneville County Idaho
1.8hours
without power for the average customer in a typical year, 2018–2025
32nd most of 35 in Idaho 72% 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 Bonneville'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 6.3 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Bonneville, 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 28, 2020 | No storm report | 28,877 | 36% | 16 h | 14 h | 338k |
| Mar 2, 2024 | Winter storm | 5,101 | 6% | 37 h | 33 h | 103k |
| Mar 29, 2021 | Windstorm | 9,496 | 12% | 7.0 h | 4.8 h | 60k |
| Dec 26, 2018 | No storm report | 17,133 | 22% | 2.0 h | 48 min | 29k |
| Sep 7, 2020 | Windstorm | 4,709 | 6% | 7.5 h | 17 h | 26k |
| Jul 10, 2025 | No storm report | 3,185 | 4% | 7.0 h | – | 22k |
| Jun 22, 2020 | No storm report | 15,171 | 19% | 1.2 h | 12 min | 19k |
| Jan 26, 2021 | No storm report | 12,061 | 15% | 1.5 h | 1.8 h | 18k |
| Jul 29, 2020 | No storm report | 15,249 | 19% | 1.2 h | 30 min | 16k |
| Apr 3, 2019 | No storm report | 9,031 | 11% | 2.5 h | 2.2 h | 15k |
| Mar 18, 2025 | Winter storm | 2,796 | 4% | 4.2 h | – | 11k |
| Feb 1, 2025 | Winter storm | 3,173 | 4% | 3.5 h | – | 11k |
| Dec 4, 2017 | No storm report | 3,724 | 5% | 4.2 h | – | 10k |
| Sep 7, 2020 | Windstorm | 3,934 | 5% | 3.5 h | – | 9.6k |
| Nov 17, 2025 | No storm report | 2,880 | 4% | 3.2 h | – | 9.4k |
| Sep 9, 2021 | No storm report | 4,007 | 5% | 2.5 h | 48 min | 8.0k |
| Apr 9, 2025 | No storm report | 1,318 | 2% | 6.0 h | – | 7.9k |
| Apr 28, 2020 | No storm report | 10,154 | 13% | 48 min | 30 min | 7.6k |
| Apr 7, 2024 | No storm report | 3,055 | 4% | 2.5 h | – | 6.8k |
| Feb 3, 2021 | Winter storm | 2,839 | 4% | 3.8 h | – | 6.7k |
| Jan 23, 2020 | No storm report | 3,741 | 5% | 2.2 h | – | 5.3k |
| Jul 14, 2024 | No storm report | 2,391 | 3% | 2.2 h | – | 5.3k |
| Jan 22, 2020 | No storm report | 3,577 | 5% | 2.5 h | – | 5.1k |
| Sep 8, 2020 | Windstorm | 1,066 | 1% | 6.0 h | – | 4.8k |
| Feb 27, 2021 | Winter storm | 1,031 | 1% | 4.8 h | – | 4.8k |
| Jan 16, 2024 | No storm report | 2,936 | 4% | 3.2 h | – | 4.7k |
| Apr 12, 2025 | No storm report | 1,639 | 2% | 3.0 h | – | 4.6k |
| May 17, 2024 | Windstorm | 988 | 1% | 5.0 h | – | 4.5k |
| Dec 1, 2023 | Winter storm | 2,190 | 3% | 1.8 h | – | 3.8k |
| Oct 2, 2025 | No storm report | 906 | 1% | 4.0 h | – | 3.6k |
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 Bonneville from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 69%
- Winter storm 17%
- Windstorm 12%
- Thunderstorms 0.9%
Who keeps the lights on
Utilities serving Bonneville
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 |
|---|---|---|---|---|---|---|
| PacifiCorp | Investor Owned | 146 | 146 | 1.16 | 13.5 | 76k |
| City of Idaho Falls | Municipal | 51 | 17 | 0.47 | 9.6 | 29k |
| Lower Valley Energy Inc | Cooperative | – | – | – | 7.8 | 1.7k |
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 79,451 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 →