Shannon CountyPower Outage History
2017–2025 · Missouri
Worse than average — more frequent or longer outages than most counties.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jan 25, 2023 | 19 hrs | 3,293 (49%) | Winter Storm |
| Jan 25, 2023 | 70 hrs | 2,906 (43%) | Winter Storm |
| May 4, 2020 | 4 hrs | 1,907 (28%) | Thunderstorm Wind |
| Jan 3, 2020 | 2 hrs | 1,750 (26%) | Unnamed event |
| Oct 21, 2019 | 34 hrs | 1,139 (17%) | Hail |
Over the 9 years from 2017 to 2025, Shannon County recorded 706 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Shannon County started January 25, 2023 (Winter Storm), lasting 19 hours and leaving up to 3,293 customers without power (49% of the county) at its peak.
August has historically been the worst month for outages in Shannon County, with 96 events recorded during that month across the dataset.
Based on this history, Shannon County earns a Reliability Grade of D, placing it in the 39th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Missouri
Counties with the closest reliability grade and national percentile to Shannon County.
| County | Grade | National percentile |
|---|---|---|
| Washington County | D | 38th |
| Holt County | D | 38th |
| Wayne County | D | 40th |
| Newton County | C | 40th |
| Bollinger County | D | 36th |
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 Shannon County?
Between 2017 and 2025, Shannon County recorded 706 outage events, averaging 2.9 hours each.
What is Shannon County's reliability grade?
Shannon County has a Reliability Grade of D, in the 39th national percentile.
What was the worst power outage in Shannon County?
The worst outage on record started January 25, 2023 (Winter Storm), lasting 19 hours and affecting up to 3,293 customers.