Power outage history
Bay County Michigan
4.0hours
without power for the average customer in a typical year, 2018–2025
80th most of 83 in Michigan 40% 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 Bay'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 6.4 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Bay, 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 | 7,486 | 11% | 3.4 d | 3.1 d | 285k |
| Aug 27, 2024 | Thunderstorms | 8,337 | 13% | 2.4 d | 2.1 d | 233k |
| Nov 5, 2022 | No storm report | 4,811 | 7% | 2.0 d | 34 h | 187k |
| Dec 11, 2021 | Windstorm | 3,794 | 6% | 2.0 d | 45 h | 106k |
| Jun 16, 2022 | Thunderstorms | 6,128 | 9% | 23 h | 18 h | 77k |
| Jan 12, 2024 | Winter storm | 3,606 | 5% | 27 h | 15 h | 64k |
| Jul 28, 2025 | Thunderstorms | 5,585 | 8% | 15 h | 13 h | 52k |
| Aug 24, 2021 | Thunderstorms | 3,837 | 6% | 18 h | 14 h | 42k |
| Nov 15, 2020 | Windstorm | 2,348 | 4% | 25 h | – | 41k |
| Feb 24, 2016 | Winter storm | 4,378 | 7% | 22 h | 19 h | 40k |
| Apr 6, 2017 | Windstorm | 3,753 | 6% | 15 h | 9.0 h | 37k |
| Aug 11, 2021 | Thunderstorms | 2,223 | 3% | 18 h | – | 31k |
| Aug 12, 2025 | Thunderstorms | 3,058 | 5% | 19 h | – | 26k |
| Sep 7, 2021 | Thunderstorms | 1,311 | 2% | 22 h | – | 26k |
| May 4, 2018 | Windstorm | 2,070 | 3% | 26 h | – | 22k |
| Aug 28, 2018 | Thunderstorms | 1,155 | 2% | 17 h | – | 18k |
| Apr 12, 2024 | No storm report | 2,056 | 3% | 9.5 h | – | 14k |
| Dec 9, 2023 | No storm report | 1,962 | 3% | 8.5 h | – | 13k |
| Dec 8, 2024 | No storm report | 1,573 | 2% | 8.0 h | – | 13k |
| Jan 11, 2020 | Ice storm | 1,597 | 2% | 10 h | – | 12k |
| Nov 15, 2022 | No storm report | 2,544 | 4% | 7.8 h | – | 11k |
| Oct 12, 2023 | No storm report | 1,348 | 2% | 7.2 h | – | 9.8k |
| May 16, 2025 | Thunderstorms | 721 | 1% | 14 h | – | 9.7k |
| Apr 23, 2022 | No storm report | 1,336 | 2% | 7.0 h | – | 9.4k |
| Sep 25, 2021 | No storm report | 2,935 | 4% | 3.2 h | – | 9.2k |
| Feb 22, 2022 | No storm report | 1,105 | 2% | 9.0 h | – | 9.1k |
| Jul 27, 2018 | No storm report | 1,726 | 3% | 5.5 h | – | 9.0k |
| Feb 19, 2019 | No storm report | 2,840 | 4% | 3.2 h | – | 8.8k |
| Sep 23, 2021 | Windstorm | 2,081 | 3% | 6.5 h | – | 8.3k |
| Jul 31, 2017 | No storm report | 2,539 | 4% | 4.8 h | – | 7.8k |
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 Bay from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 54%
- No storm on record 27%
- Windstorm 12%
- Winter storm 5.1%
- Ice storm 1.3%
Who keeps the lights on
Utilities serving Bay
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 |
|---|---|---|---|---|---|---|
| DTE Electric Company | Investor Owned | 192 | 151 | 1.16 | 20.3 | 2.1M |
| Consumers Energy Co | Investor Owned | 820 | 164 | 1.40 | 20.7 | 1.7M |
| City of Bay City | Municipal | 109 | 70 | 0.86 | 15.3 | 18k |
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 66,162 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 →