Natrona CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Natrona County, Wyoming that day.
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).
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 |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
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.