Power outage history
Walla Walla County Washington
2.3hours
without power for the average customer in a typical year, 2018–2025
24th most of 31 in Washington 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 Walla Walla's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2024 was the worst well-recorded year, at 4.1 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Walla Walla, 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 29, 2017 | Ice storm | 9,558 | 32% | 27 h | 18 h | 132k |
| Nov 7, 2017 | No storm report | 16,800 | 56% | 6.2 h | 3.8 h | 57k |
| Jul 9, 2018 | No storm report | 9,125 | 30% | 11 h | 6.0 h | 52k |
| Sep 11, 2024 | No storm report | 7,364 | 25% | 9.5 h | 5.8 h | 47k |
| Aug 3, 2025 | No storm report | 8,704 | 29% | 5.2 h | 1.5 h | 38k |
| Sep 7, 2020 | Wildfire | 3,326 | 11% | 12 h | 4.0 h | 18k |
| Aug 21, 2021 | No storm report | 7,290 | 24% | 4.5 h | 3.2 h | 16k |
| Mar 28, 2018 | No storm report | 1,185 | 4% | 8.8 h | – | 10k |
| Mar 3, 2024 | No storm report | 1,722 | 6% | 4.5 h | 1.0 h | 7.5k |
| Aug 20, 2020 | No storm report | 4,594 | 15% | 2.2 h | 1.5 h | 7.2k |
| Sep 26, 2020 | No storm report | 2,018 | 7% | 3.0 h | 1.0 h | 6.0k |
| Oct 24, 2021 | Windstorm | 670 | 2% | 14 h | – | 5.7k |
| Mar 28, 2025 | No storm report | 1,683 | 6% | 3.5 h | 11 h | 5.6k |
| Apr 15, 2018 | No storm report | 1,023 | 3% | 5.8 h | – | 5.2k |
| May 11, 2023 | No storm report | 1,279 | 4% | 4.0 h | – | 5.1k |
| Mar 23, 2024 | No storm report | 1,673 | 6% | 3.8 h | 3.8 h | 5.0k |
| Jun 15, 2021 | Thunderstorms | 2,297 | 8% | 5.2 h | 5.0 h | 4.4k |
| Oct 14, 2019 | No storm report | 1,390 | 5% | 3.2 h | – | 4.3k |
| Jun 16, 2024 | No storm report | 1,038 | 3% | 4.0 h | – | 4.2k |
| Sep 20, 2023 | No storm report | 3,622 | 12% | 2.0 h | 1.5 h | 4.1k |
| Aug 17, 2024 | No storm report | 907 | 3% | 4.0 h | – | 3.6k |
| Dec 17, 2025 | No storm report | 1,070 | 4% | 6.8 h | – | 3.5k |
| Aug 28, 2024 | No storm report | 766 | 3% | 4.5 h | – | 3.4k |
| Aug 6, 2024 | No storm report | 907 | 3% | 3.8 h | – | 3.4k |
| May 11, 2024 | No storm report | 2,184 | 7% | 1.5 h | 1.5 h | 3.3k |
| Nov 19, 2024 | Windstorm | 1,030 | 3% | 8.2 h | – | 3.2k |
| Apr 27, 2018 | Windstorm | 1,254 | 4% | 6.0 h | – | 3.0k |
| Mar 11, 2022 | No storm report | 755 | 3% | 4.0 h | – | 3.0k |
| Jan 1, 2022 | No storm report | 576 | 2% | 5.2 h | – | 2.8k |
| Jun 19, 2018 | No storm report | 975 | 3% | 2.8 h | – | 2.7k |
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 Walla Walla from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 90%
- Wildfire 4.9%
- Windstorm 3.7%
- Thunderstorms 1.2%
- Winter storm 0.5%
Who keeps the lights on
Utilities serving Walla Walla
As each utility reports to the Energy Information Administration for its whole Washington 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 | 103 | 58 | 0.56 | 14.3 | 115k |
| Inland Power & Light Company | Cooperative | 536 | 283 | 2.55 | 9.6 | 42k |
| Columbia Rural Elec Assn, Inc | Cooperative | 200 | 158 | 1.55 | 15.6 | 4.5k |
| 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.
Next door
Neighbouring counties
- Columbia 5.7 h
- Umatilla, OR 3.9 h
- Walla Walla (this county) 2.3 h
- Benton 1.3 h
- Franklin 0.4 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 30,050 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 →