Greene County Power Outage History
2017–2025 · Tennessee
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 12, 2019 | 2 hrs | 15,903 (38%) | Unnamed event |
| May 17, 2025 | 20 hrs | 9,221 (22%) | Thunderstorm Wind |
| Sep 27, 2024 | 27 hrs | 8,785 (21%) | Tropical Storm Helene |
| Dec 24, 2022 | 5 hrs | 8,053 (19%) | Winter Storm Elliott |
| Sep 27, 2024 | 9 hrs | 5,767 (14%) | Tropical Storm Helene |
Over the 9 years from 2017 to 2025, Greene County recorded 440 distinct power outage events, averaging 1.6 hours per event.
The single worst outage on record in Greene County started May 12, 2019, lasting 2 hours and leaving up to 15,903 customers without power (38% of the county) at its peak.
December has historically been the worst month for outages in Greene County, with 62 events recorded during that month across the dataset.
Based on this history, Greene County earns a Reliability Grade of B, placing it in the 76th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Greene County's outage profile
See more picks in our Best Small Power Stations (Under 1,000Wh) roundup.
Outage-prep kit
See our outage-prep guides.
Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Greene County.
| County | Grade | National percentile |
|---|---|---|
| Marion County | B | 77th |
| Marshall County | B | 77th |
| Franklin County | B | 78th |
| Cannon County | B | 78th |
| McMinn County | B | 78th |
FAQ
How often does power go out in Greene County?
Between 2017 and 2025, Greene County recorded 440 outage events, averaging 1.6 hours each.
What is Greene County's reliability grade?
Greene County has a Reliability Grade of B, in the 76th national percentile.
What was the worst power outage in Greene County?
The worst outage on record started May 12, 2019, lasting 2 hours and affecting up to 15,903 customers.