Power outage history
Green County Wisconsin
1.9hours
without power for the average customer in a typical year, 2018–2025
49th most of 72 in Wisconsin 71% 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 Green'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 3.5 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Green, 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 21, 2024 | Thunderstorms | 2,428 | 18% | 26 h | 13 h | 25k |
| Jul 19, 2017 | Windstorm | 4,731 | 36% | 31 h | 9.5 h | 19k |
| Jun 28, 2017 | Tornadoes | 4,313 | 32% | 6.0 h | 12 min | 14k |
| Jul 6, 2016 | No storm report | 3,634 | 27% | 5.5 h | 48 min | 5.5k |
| Jul 15, 2024 | Thunderstorms | 1,715 | 13% | 4.8 h | 4.0 h | 5.0k |
| Dec 15, 2021 | Windstorm | 977 | 7% | 8.5 h | 4.8 h | 4.5k |
| Jul 13, 2015 | Thunderstorms | 927 | 7% | 7.8 h | 7.2 h | 4.4k |
| Feb 7, 2021 | Winter storm | 1,480 | 11% | 3.0 h | 13 h | 4.2k |
| Aug 10, 2020 | Thunderstorms | 1,581 | 12% | 7.8 h | 4.8 h | 4.1k |
| Jul 11, 2025 | Thunderstorms | 969 | 7% | 4.2 h | 2.2 h | 3.9k |
| Jul 11, 2020 | No storm report | 2,905 | 22% | 1.5 h | 1.5 h | 3.7k |
| Nov 25, 2016 | No storm report | 1,625 | 12% | 2.2 h | 6.5 h | 3.7k |
| Jun 21, 2025 | Heat | 1,920 | 14% | 2.0 h | 1.2 h | 3.5k |
| Jun 21, 2023 | No storm report | 1,080 | 8% | 4.2 h | 4.8 h | 3.5k |
| Mar 11, 2020 | No storm report | 896 | 7% | 4.8 h | 2.0 h | 3.4k |
| Jul 24, 2022 | Thunderstorms | 562 | 4% | 5.2 h | – | 2.9k |
| Jan 11, 2020 | Winter storm | 853 | 6% | 4.8 h | 4.0 h | 2.2k |
| Mar 6, 2017 | Thunderstorms | 661 | 5% | 5.8 h | – | 2.2k |
| Mar 31, 2023 | Tornadoes | 301 | 2% | 12 h | – | 2.2k |
| Jan 9, 2024 | Winter storm | 879 | 7% | 3.5 h | 2.8 h | 1.9k |
| Sep 20, 2023 | No storm report | 861 | 6% | 2.2 h | 2.0 h | 1.9k |
| Dec 5, 2017 | Windstorm | 508 | 4% | 3.8 h | – | 1.9k |
| Jun 22, 2015 | Thunderstorms | 678 | 5% | 8.8 h | 5.2 h | 1.8k |
| Aug 9, 2020 | No storm report | 613 | 5% | 5.2 h | – | 1.7k |
| Aug 10, 2021 | No storm report | 407 | 3% | 6.8 h | – | 1.7k |
| Apr 15, 2022 | No storm report | 1,077 | 8% | 2.0 h | 30 min | 1.6k |
| May 13, 2024 | No storm report | 870 | 7% | 2.0 h | 12 h | 1.6k |
| Apr 14, 2018 | No storm report | 543 | 4% | 4.2 h | – | 1.6k |
| Sep 29, 2019 | Flooding | 578 | 4% | 2.8 h | – | 1.6k |
| Sep 20, 2022 | No storm report | 921 | 7% | 2.8 h | 2.8 h | 1.6k |
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 Green from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 50%
- Thunderstorms 31%
- Winter storm 7.8%
- Windstorm 4.2%
- Heat 3.7%
- Flooding 1.6%
- Tornadoes 1.5%
Who keeps the lights on
Utilities serving Green
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 Power & Light Co | Investor Owned | 96 | 75 | 0.79 | 18.5 | 441k |
| Scenic Rivers Energy Coop | Cooperative | 105 | 105 | 1.17 | 15.5 | 14k |
| Rock Energy Cooperative | Cooperative | 56 | 37 | 0.53 | 14.3 | 7.4k |
| City of Evansville | Municipal | – | – | – | 13.2 | 3.5k |
| Brodhead Water & Lighting Comm | Municipal | – | – | – | 13.5 | 1.5k |
| Village of New Glarus | Municipal | – | – | – | 14.7 | 1.1k |
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
- Stephenson, IL 7.2 h
- Winnebago, IL 4.0 h
- Iowa 3.3 h
- Green (this county) 1.9 h
- Rock 1.8 h
- Lafayette 1.3 h
- Dane 1.2 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 13,290 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 →