Cass County Power Outage History
2014–2025 · Minnesota
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 |
|---|---|---|---|
| Jul 21, 2016 | 109 hrs | 14,111 (59%) | Heat |
| May 30, 2022 | 64 hrs | 8,131 (34%) | Hail |
| Jun 21, 2022 | 45 hrs | 7,984 (33%) | Hail |
| Jun 21, 2025 | 38 hrs | 7,469 (31%) | Tornado |
| Oct 6, 2024 | 17 hrs | 6,018 (25%) | Unnamed event |
Over the 12 years from 2014 to 2025, Cass County recorded 847 distinct power outage events, averaging 3.2 hours per event.
The single worst outage on record in Cass County started July 21, 2016 (Heat), lasting 109 hours and leaving up to 14,111 customers without power (59% of the county) at its peak.
July has historically been the worst month for outages in Cass County, with 120 events recorded during that month across the dataset.
Based on this history, Cass County earns a Reliability Grade of F, placing it in the 16th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Minnesota
Counties with the closest reliability grade and national percentile to Cass County.
| County | Grade | National percentile |
|---|---|---|
| Aitkin County | F | 18th |
| Itasca County | D | 25th |
| Pine County | D | 37th |
| Lake County | D | 38th |
| Pipestone County | D | 38th |
FAQ
How often does power go out in Cass County?
Between 2014 and 2025, Cass County recorded 847 outage events, averaging 3.2 hours each.
What is Cass County's reliability grade?
Cass County has a Reliability Grade of F, in the 16th national percentile.
What was the worst power outage in Cass County?
The worst outage on record started July 21, 2016 (Heat), lasting 109 hours and affecting up to 14,111 customers.