Coffee 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 |
|---|---|---|---|
| May 9, 2024 | 26 hrs | 11,612 (35%) | Hail |
| Mar 29, 2020 | 6 hrs | 8,346 (25%) | Hail |
| Nov 20, 2025 | <1 hr | 7,290 (22%) | Unnamed event |
| Oct 12, 2022 | 23 hrs | 7,002 (21%) | Thunderstorm Wind |
| Feb 16, 2015 | 22 hrs | 6,594 (20%) | Winter Storm |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Coffee County, Tennessee that day.
Over the 12 years from 2014 to 2025, Coffee County recorded 312 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Coffee County started May 9, 2024 (Hail), lasting 26 hours and leaving up to 11,612 customers without power (35% of the county) at its peak.
June has historically been the worst month for outages in Coffee County, with 38 events recorded during that month across the dataset.
Based on this history, Coffee County earns a Reliability Grade of B, placing it in the 69th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Coffee County.
| County | Grade | National percentile |
|---|---|---|
| Jefferson County | B | 70th |
| Loudon County | B | 69th |
| Sequatchie County | B | 70th |
| Maury County | B | 68th |
| Haywood County | B | 72nd |
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 Coffee County?
Between 2014 and 2025, Coffee County recorded 312 outage events, averaging 2.3 hours each.
What is Coffee County's reliability grade?
Coffee County has a Reliability Grade of B, in the 69th national percentile.
What was the worst power outage in Coffee County?
The worst outage on record started May 9, 2024 (Hail), lasting 26 hours and affecting up to 11,612 customers.