Arenac County Power Outage History
2014–2025 · 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 |
|---|---|---|---|
| Aug 29, 2018 | 96 hrs | 8,089 (67%) | Tornado |
| Aug 11, 2021 | 18 hrs | 7,295 (60%) | Thunderstorm Wind |
| Aug 12, 2021 | 5 hrs | 7,139 (59%) | Thunderstorm Wind |
| Aug 12, 2021 | 1 hrs | 6,435 (53%) | Thunderstorm Wind |
| Aug 12, 2021 | 76 hrs | 6,350 (52%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Arenac County recorded 658 distinct power outage events, averaging 5.6 hours per event.
The single worst outage on record in Arenac County started August 29, 2018 (Tornado), lasting 96 hours and leaving up to 8,089 customers without power (67% of the county) at its peak.
July has historically been the worst month for outages in Arenac County, with 83 events recorded during that month across the dataset.
Based on this history, Arenac County earns a Reliability Grade of F, placing it in the 3rd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Arenac County's outage profile
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Similar counties in Michigan
Counties with the closest reliability grade and national percentile to Arenac County.
| County | Grade | National percentile |
|---|---|---|
| Iosco County | F | 3rd |
| Cheboygan County | F | 3rd |
| Otsego County | F | 4th |
| Crawford County | F | 4th |
| Clare County | F | 2nd |
FAQ
How often does power go out in Arenac County?
Between 2014 and 2025, Arenac County recorded 658 outage events, averaging 5.6 hours each.
What is Arenac County's reliability grade?
Arenac County has a Reliability Grade of F, in the 3rd national percentile.
What was the worst power outage in Arenac County?
The worst outage on record started August 29, 2018 (Tornado), lasting 96 hours and affecting up to 8,089 customers.