Ellis County Power Outage History
2014–2025 · Oklahoma
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 25, 2018 | 62 hrs | 4,291 (59%) | Drought |
| Jul 7, 2023 | 35 hrs | 3,556 (49%) | Thunderstorm Wind |
| Sep 20, 2025 | 13 hrs | 3,060 (42%) | Unnamed event |
| Jun 18, 2023 | 5 hrs | 2,903 (40%) | Drought |
| Oct 28, 2020 | 39 hrs | 2,672 (37%) | Drought |
Over the 12 years from 2014 to 2025, Ellis County recorded 666 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Ellis County started June 25, 2018 (Drought), lasting 62 hours and leaving up to 4,291 customers without power (59% of the county) at its peak.
June has historically been the worst month for outages in Ellis County, with 86 events recorded during that month across the dataset.
Based on this history, Ellis County earns a Reliability Grade of D, placing it in the 25th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Ellis County's outage profile
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Similar counties in Oklahoma
Counties with the closest reliability grade and national percentile to Ellis County.
| County | Grade | National percentile |
|---|---|---|
| Roger Mills County | D | 25th |
| Grady County | D | 26th |
| Canadian County | D | 24th |
| Lincoln County | D | 24th |
| Grant County | D | 28th |
FAQ
How often does power go out in Ellis County?
Between 2014 and 2025, Ellis County recorded 666 outage events, averaging 3.1 hours each.
What is Ellis County's reliability grade?
Ellis County has a Reliability Grade of D, in the 25th national percentile.
What was the worst power outage in Ellis County?
The worst outage on record started June 25, 2018 (Drought), lasting 62 hours and affecting up to 4,291 customers.