Simpson County Power Outage History
2014–2025 · Mississippi
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Dec 8, 2017 | 36 hrs | 10,727 (68%) | Heavy Snow |
| Jun 16, 2023 | 133 hrs | 8,287 (52%) | Thunderstorm Wind |
| Feb 15, 2021 | 73 hrs | 6,502 (41%) | Winter Storm Uri |
| Dec 29, 2024 | 71 hrs | 6,225 (39%) | Tornado |
| Oct 26, 2019 | 49 hrs | 5,900 (37%) | Tropical Storm Olga |
Over the 12 years from 2014 to 2025, Simpson County recorded 1,166 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Simpson County started December 8, 2017 (Heavy Snow), lasting 36 hours and leaving up to 10,727 customers without power (68% of the county) at its peak.
June has historically been the worst month for outages in Simpson County, with 138 events recorded during that month across the dataset.
Based on this history, Simpson County earns a Reliability Grade of F, placing it in the 9th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Mississippi
Counties with the closest reliability grade and national percentile to Simpson County.
| County | Grade | National percentile |
|---|---|---|
| Tallahatchie County | F | 10th |
| Jefferson Davis County | F | 9th |
| Walthall County | F | 9th |
| Quitman County | F | 11th |
| Pike County | F | 8th |
FAQ
How often does power go out in Simpson County?
Between 2014 and 2025, Simpson County recorded 1,166 outage events, averaging 3.0 hours each.
What is Simpson County's reliability grade?
Simpson County has a Reliability Grade of F, in the 9th national percentile.
What was the worst power outage in Simpson County?
The worst outage on record started December 8, 2017 (Heavy Snow), lasting 36 hours and affecting up to 10,727 customers.