Warren CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 10, 2021 | 68 hrs | 9,825 (44%) | Thunderstorm Wind |
| Sep 30, 2025 | <1 hr | 5,799 (26%) | Unnamed event |
| Jun 13, 2016 | 2 hrs | 5,088 (23%) | Unnamed event |
| Aug 12, 2021 | 40 hrs | 5,059 (23%) | Thunderstorm Wind |
| Aug 23, 2021 | 3 hrs | 3,080 (14%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Warren County, Missouri that day.
Over the 12 years from 2014 to 2025, Warren County recorded 725 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Warren County started July 10, 2021 (Thunderstorm Wind), lasting 68 hours and leaving up to 9,825 customers without power (44% of the county) at its peak.
July has historically been the worst month for outages in Warren County, with 79 events recorded during that month across the dataset.
Based on this history, Warren County earns a Reliability Grade of C, placing it in the 51st percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Missouri
Counties with the closest reliability grade and national percentile to Warren County.
| County | Grade | National percentile |
|---|---|---|
| Crawford County | C | 51st |
| Buchanan County | C | 51st |
| Webster County | C | 50th |
| Dent County | C | 50th |
| Ozark County | C | 53rd |
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 Warren County?
Between 2014 and 2025, Warren County recorded 725 outage events, averaging 2.5 hours each.
What is Warren County's reliability grade?
Warren County has a Reliability Grade of C, in the 51st national percentile.
What was the worst power outage in Warren County?
The worst outage on record started July 10, 2021 (Thunderstorm Wind), lasting 68 hours and affecting up to 9,825 customers.