Power outage history
Dunn County Wisconsin
1.8hours
without power for the average customer in a typical year, 2018–2025
52nd most of 72 in Wisconsin 73% 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 Dunn'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 5.2 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Dunn, 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 |
|---|---|---|---|---|---|---|
| Jul 3, 2025 | Thunderstorms | 3,365 | 14% | 26 h | 24 h | 48k |
| Jul 28, 2025 | Thunderstorms | 6,292 | 25% | 18 h | 14 h | 43k |
| Jun 10, 2016 | Thunderstorms | 3,986 | 16% | 19 h | 17 h | 24k |
| Aug 3, 2022 | Thunderstorms | 3,137 | 13% | 10 h | 7.5 h | 19k |
| Dec 15, 2022 | No storm report | 5,164 | 21% | 21 h | 4.8 h | 12k |
| Jun 30, 2019 | No storm report | 1,618 | 7% | 11 h | 9.8 h | 10k |
| Apr 20, 2020 | Thunderstorms | 2,891 | 12% | 5.8 h | 4.0 h | 9.2k |
| Jun 28, 2020 | Thunderstorms | 3,039 | 12% | 4.5 h | 3.2 h | 6.0k |
| Aug 27, 2018 | Thunderstorms | 1,139 | 5% | 8.2 h | – | 5.7k |
| Jul 19, 2023 | Thunderstorms | 1,788 | 7% | 5.2 h | 3.0 h | 4.4k |
| Apr 25, 2025 | No storm report | 1,114 | 4% | 4.0 h | – | 4.3k |
| Jun 11, 2021 | Thunderstorms | 1,701 | 7% | 3.8 h | 2.5 h | 4.3k |
| Oct 18, 2024 | No storm report | 688 | 3% | 6.2 h | – | 4.2k |
| Apr 8, 2017 | No storm report | 2,103 | 8% | 2.0 h | 1.0 h | 4.1k |
| Dec 29, 2022 | No storm report | 1,632 | 7% | 2.8 h | 4.5 h | 4.1k |
| Aug 9, 2025 | No storm report | 980 | 4% | 4.2 h | – | 3.8k |
| Feb 14, 2020 | No storm report | 1,597 | 6% | 2.5 h | 2.0 h | 3.6k |
| Jun 17, 2018 | No storm report | 1,189 | 5% | 3.2 h | – | 3.3k |
| Sep 7, 2024 | No storm report | 769 | 3% | 4.8 h | – | 3.3k |
| May 11, 2022 | No storm report | 6,799 | 27% | 30 min | 30 min | 3.2k |
| May 11, 2022 | Thunderstorms | 908 | 4% | 5.2 h | – | 2.8k |
| Jul 25, 2023 | No storm report | 3,252 | 13% | 1.2 h | 7.2 h | 2.7k |
| Aug 27, 2018 | No storm report | 3,399 | 14% | 48 min | 12 min | 2.5k |
| Sep 22, 2023 | No storm report | 978 | 4% | 3.8 h | – | 2.1k |
| Jun 6, 2024 | No storm report | 941 | 4% | 2.2 h | – | 2.1k |
| Aug 21, 2017 | No storm report | 1,046 | 4% | 2.0 h | – | 2.1k |
| Jul 18, 2015 | Tornadoes | 344 | 1% | 7.5 h | – | 2.1k |
| Jul 5, 2016 | Thunderstorms | 1,053 | 4% | 3.5 h | – | 2.0k |
| May 15, 2025 | Thunderstorms | 951 | 4% | 3.2 h | – | 2.0k |
| May 25, 2018 | No storm report | 556 | 2% | 3.5 h | – | 1.9k |
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 Dunn from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 58%
- No storm on record 40%
- Winter storm 0.9%
- Flooding 0.6%
- Tornadoes 0.5%
Who keeps the lights on
Utilities serving Dunn
As each utility reports to the Energy Information Administration for its whole Wisconsin territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Northern States Power Co | Investor Owned | 309 | 110 | 1.15 | 15.6 | 223k |
| St Croix Electric Coop | WI | 146 | 107 | 1.18 | 12.2 | 147k |
| Eau Claire Electric Coop | WI | 203 | 94 | 1.30 | 13.7 | 136k |
| Chippewa Valley Electric Coop | WI | – | – | – | 14.3 | 87k |
| Polk-Burnett Electric Coop | Cooperative | 104 | 44 | 1.47 | 16.0 | 21k |
| Barron Electric Coop | Cooperative | 307 | 126 | 2.18 | 16.0 | 19k |
| Dunn County Electric Coop | Cooperative | 129 | 32 | 0.76 | 16.2 | 9.5k |
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 24,888 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 →