Cascade CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 5, 2024 | 12 hrs | 12,024 (30%) | High Wind |
| May 8, 2024 | 118 hrs | 10,468 (26%) | Heavy Snow |
| Apr 12, 2021 | 6 hrs | 6,002 (15%) | Unnamed event |
| Nov 8, 2020 | 29 hrs | 5,616 (14%) | Unnamed event |
| Feb 1, 2020 | 18 hrs | 5,244 (13%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Cascade County, Montana that day.
Over the 6 years from 2020 to 2025, Cascade County recorded 298 distinct power outage events, averaging 3.3 hours per event.
The single worst outage on record in Cascade County started October 5, 2024 (High Wind), lasting 12 hours and leaving up to 12,024 customers without power (30% of the county) at its peak.
August has historically been the worst month for outages in Cascade County, with 39 events recorded during that month across the dataset.
Based on this history, Cascade County earns a Reliability Grade of B, placing it in the 69th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Montana
Counties with the closest reliability grade and national percentile to Cascade County.
| County | Grade | National percentile |
|---|---|---|
| Wibaux County | B | 69th |
| Liberty County | B | 69th |
| Phillips County | B | 69th |
| Prairie County | B | 71st |
| Ravalli County | B | 72nd |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Cascade County?
Between 2020 and 2025, Cascade County recorded 298 outage events, averaging 3.3 hours each.
What is Cascade County's reliability grade?
Cascade County has a Reliability Grade of B, in the 69th national percentile.
What was the worst power outage in Cascade County?
The worst outage on record started October 5, 2024 (High Wind), lasting 12 hours and affecting up to 12,024 customers.