Johnston County Power Outage History
2015–2025 · 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 18, 2023 | 65 hrs | 4,231 (47%) | Thunderstorm Wind |
| May 18, 2025 | 9 hrs | 3,098 (35%) | Thunderstorm Wind |
| Apr 28, 2024 | 40 hrs | 3,078 (35%) | Tornado |
| Oct 29, 2024 | 2 hrs | 3,077 (35%) | Unnamed event |
| Dec 13, 2022 | 1 hrs | 3,076 (34%) | Drought |
Over the 11 years from 2015 to 2025, Johnston County recorded 586 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Johnston County started June 18, 2023 (Thunderstorm Wind), lasting 65 hours and leaving up to 4,231 customers without power (47% of the county) at its peak.
May has historically been the worst month for outages in Johnston County, with 100 events recorded during that month across the dataset.
Based on this history, Johnston County earns a Reliability Grade of D, placing it in the 30th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Oklahoma
Counties with the closest reliability grade and national percentile to Johnston County.
| County | Grade | National percentile |
|---|---|---|
| Pushmataha County | D | 29th |
| Custer County | D | 31st |
| Noble County | D | 29th |
| Love County | D | 32nd |
| Grant County | D | 28th |
FAQ
How often does power go out in Johnston County?
Between 2015 and 2025, Johnston County recorded 586 outage events, averaging 3.0 hours each.
What is Johnston County's reliability grade?
Johnston County has a Reliability Grade of D, in the 30th national percentile.
What was the worst power outage in Johnston County?
The worst outage on record started June 18, 2023 (Thunderstorm Wind), lasting 65 hours and affecting up to 4,231 customers.