Shelby CountyPower Outage History
2019–2025 · Missouri
Top 20% most reliable nationally — infrequent, short outages.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jan 9, 2024 | 20 hrs | 1,776 (45%) | Winter Storm |
| Aug 14, 2021 | <1 hr | 699 (18%) | Unnamed event |
| Jun 21, 2021 | 5 hrs | 678 (17%) | Thunderstorm Wind |
| Jan 10, 2024 | 26 hrs | 670 (17%) | Winter Storm |
| Apr 7, 2021 | <1 hr | 482 (12%) | Thunderstorm Wind |
Over the 7 years from 2019 to 2025, Shelby County recorded 257 distinct power outage events, averaging 1.8 hours per event.
The single worst outage on record in Shelby County started January 9, 2024 (Winter Storm), lasting 20 hours and leaving up to 1,776 customers without power (45% of the county) at its peak.
June has historically been the worst month for outages in Shelby County, with 30 events recorded during that month across the dataset.
Based on this history, Shelby County earns a Reliability Grade of A, placing it in the 86th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Shelby 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 Missouri
Counties with the closest reliability grade and national percentile to Shelby County.
| County | Grade | National percentile |
|---|---|---|
| Wright County | A | 86th |
| Randolph County | A | 86th |
| Caldwell County | A | 85th |
| Scott County | A | 87th |
| Phelps County | A | 85th |
Most reliable counties in Missouri
The top 3 counties in Missouri by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Mercer County | A | 98th |
| McDonald County | A | 97th |
| Boone County | A | 97th |
Least reliable counties in Missouri
The bottom 3 counties in Missouri by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| St. Louis County | F | 10th |
| Reynolds County | F | 20th |
| Iron County | D | 22nd |
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 Shelby County?
Between 2019 and 2025, Shelby County recorded 257 outage events, averaging 1.8 hours each.
What is Shelby County's reliability grade?
Shelby County has a Reliability Grade of A, in the 86th national percentile.
What was the worst power outage in Shelby County?
The worst outage on record started January 9, 2024 (Winter Storm), lasting 20 hours and affecting up to 1,776 customers.