Armstrong 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 29, 2025 | 121 hrs | 20,352 (54%) | Thunderstorm Wind |
| Apr 1, 2023 | 53 hrs | 8,543 (23%) | Thunderstorm Wind |
| Nov 16, 2018 | 115 hrs | 8,322 (22%) | Winter Weather |
| Feb 24, 2019 | 78 hrs | 5,025 (13%) | Winter Weather |
| Apr 18, 2024 | 22 hrs | 4,958 (13%) | Flash Flood |
Over the 12 years from 2014 to 2025, Armstrong County recorded 797 distinct power outage events, averaging 3.6 hours per event.
The single worst outage on record in Armstrong County started April 29, 2025 (Thunderstorm Wind), lasting 121 hours and leaving up to 20,352 customers without power (54% of the county) at its peak.
June has historically been the worst month for outages in Armstrong County, with 116 events recorded during that month across the dataset.
Based on this history, Armstrong County earns a Reliability Grade of D, placing it in the 23rd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Armstrong County's outage profile
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Similar counties in Pennsylvania
Counties with the closest reliability grade and national percentile to Armstrong County.
| County | Grade | National percentile |
|---|---|---|
| Chester County | D | 23rd |
| Venango County | D | 24th |
| Bucks County | D | 24th |
| Perry County | D | 23rd |
| Columbia County | D | 27th |
FAQ
How often does power go out in Armstrong County?
Between 2014 and 2025, Armstrong County recorded 797 outage events, averaging 3.6 hours each.
What is Armstrong County's reliability grade?
Armstrong County has a Reliability Grade of D, in the 23rd national percentile.
What was the worst power outage in Armstrong County?
The worst outage on record started April 29, 2025 (Thunderstorm Wind), lasting 121 hours and affecting up to 20,352 customers.