Stone CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 15, 2023 | 30 hrs | 9,723 (52%) | Thunderstorm Wind |
| May 14, 2019 | 1 hrs | 7,123 (38%) | Unnamed event |
| Jul 31, 2023 | 41 hrs | 4,789 (25%) | Thunderstorm Wind |
| Apr 29, 2021 | 2 hrs | 4,140 (22%) | Thunderstorm Wind |
| Jul 31, 2023 | 2 hrs | 3,557 (19%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Stone County, Missouri that day.
Over the 11 years from 2015 to 2025, Stone County recorded 967 distinct power outage events, averaging 2.1 hours per event.
The single worst outage on record in Stone County started July 15, 2023 (Thunderstorm Wind), lasting 30 hours and leaving up to 9,723 customers without power (52% of the county) at its peak.
May has historically been the worst month for outages in Stone County, with 114 events recorded during that month across the dataset.
Based on this history, Stone County earns a Reliability Grade of B, placing it in the 62nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Missouri
Counties with the closest reliability grade and national percentile to Stone County.
| County | Grade | National percentile |
|---|---|---|
| Henry County | B | 62nd |
| New Madrid County | B | 61st |
| Madison County | B | 60th |
| Ripley County | B | 63rd |
| Barry County | B | 63rd |
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 Stone County?
Between 2015 and 2025, Stone County recorded 967 outage events, averaging 2.1 hours each.
What is Stone County's reliability grade?
Stone County has a Reliability Grade of B, in the 62nd national percentile.
What was the worst power outage in Stone County?
The worst outage on record started July 15, 2023 (Thunderstorm Wind), lasting 30 hours and affecting up to 9,723 customers.