Power outage history
Calhoun County Michigan
13hours
without power for the average customer in a typical year, 2018–2025
46th most of 83 in Michigan 2.0× 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 Calhoun'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 24 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Calhoun, 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 10, 2020 | Thunderstorms | 30,725 | 33% | 4.4 d | 2.9 d | 1.9M |
| Feb 22, 2023 | Ice storm | 25,676 | 28% | 4.3 d | 3.1 d | 1.4M |
| May 15, 2025 | Thunderstorms | 21,889 | 24% | 4.5 d | 3.6 d | 1.1M |
| Aug 29, 2022 | Thunderstorms | 21,753 | 23% | 2.9 d | 2.5 d | 801k |
| Mar 30, 2025 | Thunderstorms | 13,044 | 14% | 4.1 d | 3.5 d | 591k |
| Aug 12, 2021 | No storm report | 8,842 | 10% | 5.4 d | 5.3 d | 573k |
| Jul 20, 2019 | No storm report | 5,708 | 6% | 44 h | 18 h | 162k |
| Mar 9, 2017 | No storm report | 8,967 | 10% | 21 h | 33 h | 160k |
| Aug 3, 2022 | Thunderstorms | 9,572 | 10% | 28 h | 25 h | 150k |
| Mar 10, 2017 | No storm report | 6,079 | 7% | 2.1 d | 2.2 d | 149k |
| Apr 12, 2024 | No storm report | 10,575 | 11% | 23 h | 19 h | 148k |
| Nov 5, 2022 | No storm report | 5,540 | 6% | 34 h | 37 h | 95k |
| Sep 7, 2021 | Thunderstorms | 4,517 | 5% | 25 h | – | 81k |
| Apr 15, 2018 | Winter storm | 5,572 | 6% | 28 h | 15 h | 81k |
| Jun 25, 2024 | Thunderstorms | 4,562 | 5% | 26 h | – | 57k |
| Aug 10, 2021 | Thunderstorms | 8,627 | 9% | 19 h | 2.5 h | 56k |
| Jan 12, 2024 | Winter storm | 3,260 | 4% | 26 h | – | 56k |
| Feb 19, 2016 | No storm report | 3,888 | 4% | 23 h | – | 54k |
| Aug 24, 2021 | No storm report | 3,433 | 4% | 22 h | – | 49k |
| Jul 26, 2023 | Thunderstorms | 3,438 | 4% | 22 h | – | 47k |
| Nov 15, 2020 | No storm report | 2,606 | 3% | 22 h | – | 46k |
| Jul 18, 2016 | Thunderstorms | 5,653 | 6% | 12 h | 3.5 h | 43k |
| Oct 20, 2018 | No storm report | 3,185 | 3% | 17 h | – | 42k |
| Jul 10, 2024 | Hurricane Beryl | 3,290 | 4% | 19 h | – | 38k |
| Nov 27, 2019 | No storm report | 3,125 | 3% | 22 h | – | 37k |
| Dec 11, 2021 | Windstorm | 2,729 | 3% | 25 h | – | 36k |
| Jun 17, 2024 | Thunderstorms | 3,264 | 4% | 15 h | – | 34k |
| Feb 28, 2024 | Tornadoes | 2,140 | 2% | 17 h | – | 33k |
| Nov 26, 2018 | No storm report | 4,009 | 4% | 13 h | – | 32k |
| Feb 27, 2025 | No storm report | 5,183 | 6% | 9.0 h | 7.2 h | 29k |
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 Calhoun from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 58%
- No storm on record 22%
- Ice storm 16%
- Winter storm 1.7%
Who keeps the lights on
Utilities serving Calhoun
As each utility reports to the Energy Information Administration for its whole Michigan territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Consumers Energy Co | Investor Owned | 820 | 164 | 1.40 | 20.7 | 1.7M |
| City of Marshall | MI | – | – | – | 13.2 | 26k |
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 92,794 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 →