Johnston CountyPower Outage History
What this grade means
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Johnston County, Oklahoma that day.
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).
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 |
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 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.