Lewis County Power Outage History
2019–2025 · Washington
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 2, 2019 | 2 hrs | 19,450 (34%) | Unnamed event |
| Jul 12, 2019 | 1 hrs | 18,725 (33%) | Unnamed event |
| Dec 17, 2025 | 37 hrs | 15,687 (28%) | Unnamed event |
| May 16, 2023 | 2 hrs | 11,418 (20%) | Unnamed event |
| Jan 10, 2024 | 23 hrs | 11,153 (20%) | Unnamed event |
Over the 7 years from 2019 to 2025, Lewis County recorded 603 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Lewis County started August 2, 2019, lasting 2 hours and leaving up to 19,450 customers without power (34% of the county) at its peak.
December has historically been the worst month for outages in Lewis County, with 95 events recorded during that month across the dataset.
Based on this history, Lewis County earns a Reliability Grade of C, placing it in the 59th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Washington
Counties with the closest reliability grade and national percentile to Lewis County.
| County | Grade | National percentile |
|---|---|---|
| Mason County | C | 55th |
| Columbia County | B | 63rd |
| Pend Oreille County | C | 51st |
| Spokane County | B | 69th |
| Snohomish County | B | 70th |
FAQ
How often does power go out in Lewis County?
Between 2019 and 2025, Lewis County recorded 603 outage events, averaging 3.0 hours each.
What is Lewis County's reliability grade?
Lewis County has a Reliability Grade of C, in the 59th national percentile.
What was the worst power outage in Lewis County?
The worst outage on record started August 2, 2019, lasting 2 hours and affecting up to 19,450 customers.