Power outage history
Ionia County Michigan
15hours
without power for the average customer in a typical year, 2018–2025
39th most of 83 in Michigan 2.2× 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 Ionia's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2019 was the worst well-recorded year, at 41 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Ionia, 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 |
|---|---|---|---|---|---|---|
| Feb 6, 2019 | Ice storm | 14,143 | 40% | 5.5 d | 3.1 d | 983k |
| Aug 24, 2023 | Thunderstorms | 12,623 | 36% | 4.1 d | 3.9 d | 615k |
| Jul 20, 2019 | Thunderstorms | 5,812 | 16% | 3.4 d | 2.3 d | 242k |
| Aug 27, 2024 | Thunderstorms | 5,849 | 17% | 2.3 d | 47 h | 177k |
| Mar 9, 2017 | No storm report | 10,361 | 29% | 21 h | 33 h | 164k |
| Dec 11, 2021 | No storm report | 3,694 | 10% | 2.5 d | 2.2 d | 129k |
| Mar 30, 2025 | Tornadoes | 4,293 | 12% | 2.4 d | 2.3 d | 116k |
| Aug 12, 2021 | No storm report | 2,958 | 8% | 2.3 d | 2.3 d | 100k |
| Feb 27, 2023 | No storm report | 2,715 | 8% | 3.0 d | 48 h | 96k |
| Mar 10, 2017 | No storm report | 4,867 | 14% | 46 h | 45 h | 89k |
| Aug 10, 2021 | Thunderstorms | 4,676 | 13% | 19 h | 9.2 h | 85k |
| May 4, 2018 | No storm report | 3,766 | 11% | 37 h | 25 h | 83k |
| May 15, 2025 | Thunderstorms | 4,234 | 12% | 47 h | 43 h | 73k |
| Dec 24, 2015 | No storm report | 2,177 | 6% | 2.3 d | 2.0 d | 65k |
| Aug 29, 2022 | Thunderstorms | 2,879 | 8% | 36 h | 4.5 h | 56k |
| Nov 15, 2020 | No storm report | 2,678 | 8% | 28 h | 21 h | 38k |
| Aug 28, 2020 | Thunderstorms | 2,648 | 8% | 26 h | 22 h | 38k |
| Apr 14, 2018 | Winter storm | 3,258 | 9% | 30 h | 16 h | 35k |
| Feb 19, 2016 | No storm report | 2,148 | 6% | 24 h | 19 h | 30k |
| May 9, 2018 | No storm report | 5,887 | 17% | 7.5 h | 7.0 h | 28k |
| Aug 24, 2021 | No storm report | 1,768 | 5% | 25 h | 23 h | 27k |
| Sep 12, 2019 | Thunderstorms | 4,907 | 14% | 20 h | 15 h | 24k |
| Dec 29, 2025 | No storm report | 1,218 | 3% | 22 h | – | 24k |
| Nov 21, 2021 | No storm report | 2,276 | 6% | 17 h | 13 h | 24k |
| Nov 5, 2022 | No storm report | 1,146 | 3% | 32 h | – | 22k |
| Aug 29, 2019 | Thunderstorms | 2,255 | 6% | 19 h | 15 h | 20k |
| Jun 11, 2021 | Thunderstorms | 1,455 | 4% | 21 h | – | 19k |
| Jul 31, 2024 | No storm report | 3,233 | 9% | 6.0 h | 4.8 h | 19k |
| May 31, 2025 | No storm report | 2,693 | 8% | 7.0 h | 6.0 h | 19k |
| Oct 13, 2025 | No storm report | 3,204 | 9% | 5.5 h | 7.0 h | 18k |
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 Ionia from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 37%
- No storm on record 31%
- Ice storm 26%
- Tornadoes 3.3%
- Winter storm 1.2%
Who keeps the lights on
Utilities serving Ionia
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 |
| Tri-County Electric Coop (MI) | Cooperative | 1,153 | 119 | 1.82 | 18.3 | 23k |
| City of Portland | MI | – | – | – | – | 16k |
| Wolverine Power Supply Coop | Cooperative | – | – | – | – | – |
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 35,242 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 →