Power outage history
Grant County Wisconsin
1.4hours
without power for the average customer in a typical year, 2018–2025
57th most of 72 in Wisconsin 78% 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 Grant'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 2.4 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Grant, 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 |
|---|---|---|---|---|---|---|
| Jun 22, 2015 | Thunderstorms | 7,417 | 50% | 19 h | 22 h | 103k |
| Aug 10, 2020 | Thunderstorms | 4,608 | 31% | 13 h | 6.0 h | 23k |
| Jun 28, 2017 | Thunderstorms | 1,297 | 9% | 43 h | 2.0 h | 15k |
| Jul 19, 2017 | Thunderstorms | 2,745 | 19% | 24 h | 9.5 h | 15k |
| Apr 7, 2016 | No storm report | 1,682 | 11% | 6.0 h | 6.0 h | 10k |
| Jul 26, 2023 | Thunderstorms | 1,640 | 11% | 4.5 h | 1.8 h | 6.6k |
| Aug 10, 2025 | Flooding | 1,885 | 13% | 3.8 h | 4.0 h | 6.4k |
| Jun 23, 2015 | No storm report | 1,363 | 9% | 6.2 h | 4.5 h | 6.2k |
| Jul 15, 2024 | Thunderstorms | 1,692 | 12% | 4.0 h | 4.2 h | 5.7k |
| Jan 31, 2019 | Winter storm | 876 | 6% | 5.2 h | 5.2 h | 4.0k |
| Jun 17, 2017 | Thunderstorms | 622 | 4% | 5.5 h | – | 3.4k |
| Aug 5, 2016 | Thunderstorms | 2,590 | 18% | 1.2 h | 1.2 h | 3.2k |
| Aug 7, 2021 | Tornadoes | 301 | 2% | 11 h | – | 3.2k |
| Aug 30, 2016 | No storm report | 1,691 | 11% | 1.8 h | 6.2 h | 3.0k |
| Jun 16, 2023 | No storm report | 1,581 | 11% | 2.0 h | 1.0 h | 2.9k |
| Jul 15, 2022 | No storm report | 651 | 4% | 4.5 h | – | 2.9k |
| Aug 18, 2016 | Thunderstorms | 1,905 | 13% | 1.5 h | 1.5 h | 2.9k |
| Dec 15, 2021 | Thunderstorms | 410 | 3% | 7.5 h | – | 2.8k |
| Feb 7, 2019 | No storm report | 1,886 | 13% | 2.8 h | 2.2 h | 2.8k |
| Apr 23, 2017 | No storm report | 294 | 2% | 11 h | – | 2.7k |
| May 28, 2016 | No storm report | 2,210 | 15% | 1.2 h | 1.2 h | 2.7k |
| Jan 24, 2019 | No storm report | 1,882 | 13% | 1.5 h | 1.5 h | 2.6k |
| Mar 19, 2019 | No storm report | 623 | 4% | 5.0 h | – | 2.6k |
| Mar 16, 2016 | Windstorm | 978 | 7% | 3.5 h | 2.0 h | 2.6k |
| Jun 23, 2015 | No storm report | 1,558 | 11% | 3.5 h | 9.5 h | 2.3k |
| Sep 2, 2018 | Thunderstorms | 1,018 | 7% | 3.2 h | 7.0 h | 2.3k |
| Mar 28, 2020 | Tornadoes | 1,403 | 10% | 2.2 h | 2.0 h | 2.2k |
| Oct 8, 2016 | No storm report | 1,693 | 12% | 1.2 h | 1.2 h | 2.1k |
| Jun 17, 2017 | No storm report | 1,992 | 14% | 2.5 h | 1.0 h | 2.0k |
| May 31, 2017 | No storm report | 612 | 4% | 3.0 h | – | 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 Grant from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 47%
- Thunderstorms 37%
- Flooding 7.0%
- Winter storm 4.5%
- Tornadoes 4.4%
Who keeps the lights on
Utilities serving Grant
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 |
|---|---|---|---|---|---|---|
| Wisconsin Electric Power Co | Investor Owned | 185 | 93 | 0.90 | 20.5 | 1.1M |
| Wisconsin Power & Light Co | Investor Owned | 96 | 75 | 0.79 | 18.5 | 441k |
| Scenic Rivers Energy Coop | Cooperative | 105 | 105 | 1.17 | 15.5 | 14k |
| City of Fennimore | WI | – | – | – | – | 9.9k |
| Village of Hazel Green | WI | – | – | – | – | 4.6k |
| City of Boscobel | Municipal | – | – | – | 11.1 | 1.5k |
| City of Cuba City | Municipal | – | – | – | 12.0 | 998 |
| Village of Muscoda | Municipal | 11 | 11 | 0.04 | 11.4 | 934 |
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
- Jo Daviess, IL 4.3 h
- Iowa 3.3 h
- Clayton, IA 1.6 h
- Grant (this county) 1.4 h
- Crawford 1.4 h
- Dubuque, IA 1.4 h
- Lafayette 1.3 h
- Richland 0.6 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 14,715 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 →