Power outage history
Hennepin County Minnesota
3.1hours
without power for the average customer in a typical year, 2018–2025
23rd most of 54 in Minnesota 52% 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 Hennepin'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 6.5 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Hennepin, 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 14, 2024 | Thunderstorms | 75,672 | 12% | 41 h | 4.5 h | 1.3M |
| Aug 26, 2024 | Thunderstorms | 71,755 | 11% | 43 h | 30 h | 1.2M |
| May 11, 2022 | Thunderstorms | 54,153 | 9% | 30 h | 35 h | 729k |
| Jun 11, 2017 | Thunderstorms | 53,530 | 9% | 29 h | 28 h | 623k |
| Jun 24, 2023 | Windstorm | 84,596 | 14% | 9.8 h | 8.5 h | 387k |
| Aug 3, 2022 | Thunderstorms | 46,035 | 7% | 17 h | 17 h | 373k |
| Mar 31, 2023 | Winter storm | 26,674 | 4% | 21 h | 27 h | 355k |
| Aug 14, 2020 | Tornadoes | 27,088 | 4% | 22 h | 25 h | 344k |
| Jun 29, 2025 | Thunderstorms | 38,258 | 6% | 15 h | 13 h | 337k |
| Jul 19, 2015 | No storm report | 43,903 | 7% | 8.5 h | 8.0 h | 282k |
| Jul 27, 2025 | Thunderstorms | 25,656 | 4% | 17 h | 21 h | 227k |
| Jul 28, 2025 | Thunderstorms | 24,773 | 4% | 14 h | 16 h | 189k |
| Sep 17, 2021 | Thunderstorms | 20,913 | 3% | 11 h | 19 h | 118k |
| Jul 6, 2016 | No storm report | 11,955 | 2% | 8.0 h | 8.0 h | 89k |
| Jun 14, 2017 | Thunderstorms | 15,089 | 2% | 8.2 h | 20 h | 78k |
| Jun 25, 2023 | Windstorm | 25,650 | 4% | 9.2 h | 2.8 h | 76k |
| Aug 27, 2022 | No storm report | 17,160 | 3% | 4.8 h | 15 h | 58k |
| Sep 20, 2018 | No storm report | 18,546 | 3% | 5.5 h | 5.0 h | 54k |
| Aug 29, 2024 | Thunderstorms | 13,755 | 2% | 4.8 h | 16 h | 47k |
| Jul 1, 2018 | No storm report | 19,946 | 3% | 6.0 h | 7.2 h | 45k |
| Jul 18, 2020 | Thunderstorms | 10,409 | 2% | 5.0 h | 11 h | 44k |
| Jul 10, 2024 | Thunderstorms | 9,758 | 2% | 6.0 h | 5.8 h | 43k |
| Sep 23, 2023 | No storm report | 12,115 | 2% | 2.5 h | 12 min | 30k |
| Aug 5, 2024 | No storm report | 13,405 | 2% | 3.2 h | 7.0 h | 29k |
| Jun 11, 2018 | Windstorm | 8,448 | 1% | 3.8 h | 12 h | 27k |
| Oct 31, 2024 | Winter storm | 14,294 | 2% | 2.8 h | 7.0 h | 27k |
| May 16, 2025 | No storm report | 14,706 | 2% | 2.2 h | 6.2 h | 26k |
| Aug 10, 2020 | Thunderstorms | 8,683 | 1% | 3.5 h | 6.5 h | 25k |
| Jul 28, 2018 | No storm report | 8,655 | 1% | 3.0 h | 2.0 h | 25k |
| Mar 9, 2018 | No storm report | 8,334 | 1% | 3.0 h | 8.5 h | 24k |
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 Hennepin from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 71%
- No storm on record 10%
- Windstorm 7.2%
- Winter storm 6.5%
- Tornadoes 5.1%
Who keeps the lights on
Utilities serving Hennepin
As each utility reports to the Energy Information Administration for its whole Minnesota 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 - Minnesota | Investor Owned | 226 | 115 | 1.38 | 17.1 | 1.2M |
| Connexus Energy | Cooperative | 54 | 38 | 0.55 | 14.1 | 136k |
| Wright-Hennepin Coop Elec Assn | Cooperative | 45 | 29 | 0.56 | 15.0 | 55k |
| Minnesota Valley Electric Coop | Cooperative | 87 | 50 | 0.73 | 14.4 | 44k |
| City of Elk River | Municipal | 19 | 12 | 0.30 | 16.3 | 12k |
| City of Anoka | Municipal | 20 | 10 | 0.16 | 16.2 | 12k |
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.
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 624,985 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 →