Mackinac County Power Outage History
2019–2025 · Michigan
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Mar 30, 2025 | 662 hrs | 7,585 (87%) | Ice Storm |
| Dec 16, 2021 | 77 hrs | 4,474 (51%) | High Wind |
| Nov 5, 2022 | 46 hrs | 3,480 (40%) | Unnamed event |
| Jun 10, 2021 | 7 hrs | 3,367 (38%) | Unnamed event |
| Apr 12, 2023 | 184 hrs | 3,075 (35%) | Unnamed event |
Over the 7 years from 2019 to 2025, Mackinac County recorded 607 distinct power outage events, averaging 7.7 hours per event.
The single worst outage on record in Mackinac County started March 30, 2025 (Ice Storm), lasting 662 hours and leaving up to 7,585 customers without power (87% of the county) at its peak.
November has historically been the worst month for outages in Mackinac County, with 77 events recorded during that month across the dataset.
Based on this history, Mackinac County earns a Reliability Grade of F, placing it in the 7th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Michigan
Counties with the closest reliability grade and national percentile to Mackinac County.
| County | Grade | National percentile |
|---|---|---|
| Missaukee County | F | 7th |
| Lake County | F | 7th |
| Hillsdale County | F | 7th |
| Sanilac County | F | 8th |
| Livingston County | F | 8th |
FAQ
How often does power go out in Mackinac County?
Between 2019 and 2025, Mackinac County recorded 607 outage events, averaging 7.7 hours each.
What is Mackinac County's reliability grade?
Mackinac County has a Reliability Grade of F, in the 7th national percentile.
What was the worst power outage in Mackinac County?
The worst outage on record started March 30, 2025 (Ice Storm), lasting 662 hours and affecting up to 7,585 customers.