Sublette CountyPower Outage History
2017–2025 · Wyoming
Better than average — fewer or shorter outages than most counties.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 12, 2024 | 1 hrs | 5,905 (93%) | Unnamed event |
| Jun 11, 2024 | 2 hrs | 5,905 (93%) | Unnamed event |
| Nov 7, 2018 | <1 hr | 5,787 (91%) | Winter Storm |
| Sep 11, 2018 | 5 hrs | 5,635 (89%) | Unnamed event |
| May 16, 2021 | 1 hrs | 4,170 (66%) | Unnamed event |
Over the 9 years from 2017 to 2025, Sublette County recorded 290 distinct power outage events, averaging 3.2 hours per event.
The single worst outage on record in Sublette County started June 12, 2024, lasting 1 hours and leaving up to 5,905 customers without power (93% of the county) at its peak.
August has historically been the worst month for outages in Sublette County, with 47 events recorded during that month across the dataset.
Based on this history, Sublette County earns a Reliability Grade of B, placing it in the 64th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Sublette County's outage profile
See more picks in our Best Small Power Stations (Under 1,000Wh) roundup.
Outage-prep kit
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Similar counties in Wyoming
Counties with the closest reliability grade and national percentile to Sublette County.
| County | Grade | National percentile |
|---|---|---|
| Weston County | B | 64th |
| Johnson County | B | 69th |
| Albany County | B | 71st |
| Hot Springs County | B | 73rd |
| Carbon County | B | 75th |
Most reliable counties in Wyoming
The top 3 counties in Wyoming by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Teton County | A | 97th |
| Fremont County | A | 94th |
| Niobrara County | A | 93rd |
Least reliable counties in Wyoming
The bottom 3 counties in Wyoming by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Crook County | C | 41st |
| Converse County | C | 48th |
| Weston County | B | 64th |
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 Sublette County?
Between 2017 and 2025, Sublette County recorded 290 outage events, averaging 3.2 hours each.
What is Sublette County's reliability grade?
Sublette County has a Reliability Grade of B, in the 64th national percentile.
What was the worst power outage in Sublette County?
The worst outage on record started June 12, 2024, lasting 1 hours and affecting up to 5,905 customers.