Jefferson County Power Outage History
2014–2025 · West Virginia
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 17, 2015 | 2 hrs | 20,930 (68%) | Unnamed event |
| Feb 17, 2015 | 2 hrs | 4,546 (15%) | Winter Weather |
| Oct 15, 2017 | 6 hrs | 4,448 (15%) | Unnamed event |
| Mar 29, 2021 | 9 hrs | 4,018 (13%) | Dense Fog |
| Aug 18, 2017 | 6 hrs | 3,890 (13%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Jefferson County recorded 524 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Jefferson County started August 17, 2015, lasting 2 hours and leaving up to 20,930 customers without power (68% of the county) at its peak.
July has historically been the worst month for outages in Jefferson County, with 72 events recorded during that month across the dataset.
Based on this history, Jefferson County earns a Reliability Grade of C, placing it in the 53rd percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in West Virginia
Counties with the closest reliability grade and national percentile to Jefferson County.
| County | Grade | National percentile |
|---|---|---|
| Mineral County | D | 38th |
| Wood County | D | 28th |
| Monongalia County | D | 28th |
| Preston County | D | 24th |
| Harrison County | D | 23rd |
FAQ
How often does power go out in Jefferson County?
Between 2014 and 2025, Jefferson County recorded 524 outage events, averaging 3.1 hours each.
What is Jefferson County's reliability grade?
Jefferson County has a Reliability Grade of C, in the 53rd national percentile.
What was the worst power outage in Jefferson County?
The worst outage on record started August 17, 2015, lasting 2 hours and affecting up to 20,930 customers.