Webster County Power Outage History
2015–2025 · Iowa
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 |
|---|---|---|---|
| Jul 17, 2016 | 4 hrs | 11,490 (56%) | Thunderstorm Wind |
| May 17, 2017 | 16 hrs | 10,470 (51%) | Hail |
| Jul 17, 2016 | 19 hrs | 8,386 (41%) | Thunderstorm Wind |
| Jun 8, 2016 | 2 hrs | 7,515 (37%) | Unnamed event |
| Mar 5, 2025 | 37 hrs | 7,101 (35%) | High Wind |
Over the 11 years from 2015 to 2025, Webster County recorded 297 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Webster County started July 17, 2016 (Thunderstorm Wind), lasting 4 hours and leaving up to 11,490 customers without power (56% of the county) at its peak.
June has historically been the worst month for outages in Webster County, with 41 events recorded during that month across the dataset.
Based on this history, Webster 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 Iowa
Counties with the closest reliability grade and national percentile to Webster County.
| County | Grade | National percentile |
|---|---|---|
| Allamakee County | C | 58th |
| Johnson County | C | 58th |
| Butler County | C | 59th |
| Sac County | C | 58th |
| Guthrie County | C | 59th |
FAQ
How often does power go out in Webster County?
Between 2015 and 2025, Webster County recorded 297 outage events, averaging 2.5 hours each.
What is Webster County's reliability grade?
Webster County has a Reliability Grade of C, in the 59th national percentile.
What was the worst power outage in Webster County?
The worst outage on record started July 17, 2016 (Thunderstorm Wind), lasting 4 hours and affecting up to 11,490 customers.