Cass 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 |
|---|---|---|---|
| Mar 7, 2017 | 14 hrs | 28,647 (43%) | Hail |
| May 26, 2024 | 41 hrs | 7,280 (11%) | Thunderstorm Wind |
| Aug 19, 2025 | 7 hrs | 6,600 (10%) | Unnamed event |
| Jan 12, 2019 | 83 hrs | 6,318 (9%) | Winter Storm |
| May 4, 2020 | 18 hrs | 6,073 (9%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Cass County, Missouri that day.
Over the 11 years from 2015 to 2025, Cass County recorded 698 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Cass County started March 7, 2017 (Hail), lasting 14 hours and leaving up to 28,647 customers without power (43% of the county) at its peak.
June has historically been the worst month for outages in Cass County, with 91 events recorded during that month across the dataset.
Based on this history, Cass County earns a Reliability Grade of B, placing it in the 70th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Missouri
Counties with the closest reliability grade and national percentile to Cass County.
| County | Grade | National percentile |
|---|---|---|
| Schuyler County | B | 70th |
| Atchison County | B | 71st |
| Douglas County | B | 71st |
| Texas County | B | 72nd |
| Camden 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 Cass County?
Between 2015 and 2025, Cass County recorded 698 outage events, averaging 2.6 hours each.
What is Cass County's reliability grade?
Cass County has a Reliability Grade of B, in the 70th national percentile.
What was the worst power outage in Cass County?
The worst outage on record started March 7, 2017 (Hail), lasting 14 hours and affecting up to 28,647 customers.