Lewis County Power Outage History
2014–2025 · New York
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 |
|---|---|---|---|
| Dec 11, 2021 | 52 hrs | 6,974 (46%) | High Wind |
| Aug 8, 2023 | 6 hrs | 6,396 (42%) | Thunderstorm Wind |
| Sep 24, 2024 | 1 hrs | 6,229 (41%) | Unnamed event |
| Jul 27, 2015 | 1 hrs | 4,883 (32%) | Unnamed event |
| Jul 28, 2015 | 2 hrs | 4,882 (32%) | Unnamed event |
Over the 12 years from 2014 to 2025, Lewis County recorded 802 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Lewis County started December 11, 2021 (High Wind), lasting 52 hours and leaving up to 6,974 customers without power (46% of the county) at its peak.
November has historically been the worst month for outages in Lewis County, with 101 events recorded during that month across the dataset.
Based on this history, Lewis County earns a Reliability Grade of D, placing it in the 29th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in New York
Counties with the closest reliability grade and national percentile to Lewis County.
| County | Grade | National percentile |
|---|---|---|
| Westchester County | D | 29th |
| Wyoming County | D | 29th |
| Steuben County | D | 29th |
| Schoharie County | D | 26th |
| Allegany County | D | 31st |
FAQ
How often does power go out in Lewis County?
Between 2014 and 2025, Lewis County recorded 802 outage events, averaging 3.1 hours each.
What is Lewis County's reliability grade?
Lewis County has a Reliability Grade of D, in the 29th national percentile.
What was the worst power outage in Lewis County?
The worst outage on record started December 11, 2021 (High Wind), lasting 52 hours and affecting up to 6,974 customers.