Natrona County Power Outage History
2017–2025 · Wyoming
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 13, 2025 | 4 hrs | 43,178 (89%) | Unnamed event |
| Jul 15, 2024 | 1 hrs | 27,460 (57%) | Thunderstorm Wind |
| Jun 27, 2020 | 5 hrs | 12,288 (25%) | Unnamed event |
| Mar 20, 2023 | 4 hrs | 11,854 (25%) | High Wind |
| Jul 28, 2025 | 4 hrs | 7,603 (16%) | Wildfire |
Over the 9 years from 2017 to 2025, Natrona County recorded 292 distinct power outage events, averaging 1.7 hours per event.
The single worst outage on record in Natrona County started November 13, 2025, lasting 4 hours and leaving up to 43,178 customers without power (89% of the county) at its peak.
August has historically been the worst month for outages in Natrona County, with 58 events recorded during that month across the dataset.
Based on this history, Natrona County earns a Reliability Grade of A, placing it in the 87th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Natrona County's outage profile
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Similar counties in Wyoming
Counties with the closest reliability grade and national percentile to Natrona County.
| County | Grade | National percentile |
|---|---|---|
| Park County | A | 88th |
| Lincoln County | A | 89th |
| Washakie County | A | 90th |
| Uinta County | A | 93rd |
| Big Horn County | A | 82nd |
FAQ
How often does power go out in Natrona County?
Between 2017 and 2025, Natrona County recorded 292 outage events, averaging 1.7 hours each.
What is Natrona County's reliability grade?
Natrona County has a Reliability Grade of A, in the 87th national percentile.
What was the worst power outage in Natrona County?
The worst outage on record started November 13, 2025, lasting 4 hours and affecting up to 43,178 customers.