Jefferson County Power Outage History
2014–2025 · Pennsylvania
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 |
|---|---|---|---|
| Apr 1, 2023 | 46 hrs | 10,971 (46%) | Thunderstorm Wind |
| Mar 16, 2025 | 49 hrs | 9,180 (39%) | Thunderstorm Wind |
| Apr 29, 2025 | 90 hrs | 7,160 (30%) | Thunderstorm Wind |
| Jul 13, 2021 | 5 hrs | 6,833 (29%) | Thunderstorm Wind |
| Apr 2, 2018 | 2 hrs | 6,198 (26%) | Unnamed event |
Over the 12 years from 2014 to 2025, Jefferson County recorded 763 distinct power outage events, averaging 3.6 hours per event.
The single worst outage on record in Jefferson County started April 1, 2023 (Thunderstorm Wind), lasting 46 hours and leaving up to 10,971 customers without power (46% of the county) at its peak.
June has historically been the worst month for outages in Jefferson County, with 115 events recorded during that month across the dataset.
Based on this history, Jefferson County earns a Reliability Grade of D, placing it in the 28th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Pennsylvania
Counties with the closest reliability grade and national percentile to Jefferson County.
| County | Grade | National percentile |
|---|---|---|
| Montgomery County | D | 28th |
| McKean County | D | 27th |
| Warren County | D | 28th |
| Columbia County | D | 27th |
| Clarion County | D | 29th |
FAQ
How often does power go out in Jefferson County?
Between 2014 and 2025, Jefferson County recorded 763 outage events, averaging 3.6 hours each.
What is Jefferson County's reliability grade?
Jefferson County has a Reliability Grade of D, in the 28th national percentile.
What was the worst power outage in Jefferson County?
The worst outage on record started April 1, 2023 (Thunderstorm Wind), lasting 46 hours and affecting up to 10,971 customers.