Power outage history
Greene County Tennessee
3.5hours
without power for the average customer in a typical year, 2018–2025
47th most of 73 in Tennessee 46% below the national median
Every day since 2015
Eleven years, one night at a time
Each cell is a day. The brighter it is, the larger the share of Greene's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2024 was the worst well-recorded year, at 11 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Greene, hours without power per customer
The record
The biggest outages since 2015
Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.
| Began | Storm | Peak out | Share | Lasted | 90% restored | Customer-hours |
|---|---|---|---|---|---|---|
| Sep 27, 2024 | Hurricane Helene | 8,785 | 22% | 4.5 d | 20 h | 323k |
| May 17, 2025 | Thunderstorms | 9,221 | 23% | 20 h | 18 h | 56k |
| Jan 12, 2024 | Windstorm | 5,131 | 13% | 28 h | 9.5 h | 41k |
| Dec 24, 2022 | No storm report | 8,053 | 20% | 5.0 h | 2.8 h | 21k |
| May 20, 2025 | Thunderstorms | 3,202 | 8% | 16 h | 17 h | 17k |
| May 11, 2019 | No storm report | 15,903 | 40% | 2.2 h | 5.8 h | 11k |
| May 6, 2022 | Thunderstorms | 2,652 | 7% | 4.8 h | 5.5 h | 6.9k |
| Dec 23, 2022 | No storm report | 5,206 | 13% | 2.2 h | 48 min | 6.7k |
| Dec 11, 2021 | No storm report | 2,562 | 6% | 2.8 h | 2.0 h | 6.5k |
| Jul 6, 2020 | No storm report | 2,428 | 6% | 2.5 h | 2.5 h | 6.1k |
| Mar 25, 2023 | Thunderstorms | 1,913 | 5% | 5.0 h | – | 5.7k |
| Oct 6, 2021 | No storm report | 3,748 | 9% | 2.5 h | 6.2 h | 5.7k |
| Sep 12, 2023 | Thunderstorms | 1,465 | 4% | 8.2 h | – | 5.3k |
| Apr 1, 2023 | No storm report | 1,757 | 4% | 6.0 h | – | 5.3k |
| Jul 29, 2023 | Thunderstorms | 3,325 | 8% | 4.0 h | 3.2 h | 5.2k |
| Dec 8, 2022 | No storm report | 3,121 | 8% | 2.0 h | 8.8 h | 5.2k |
| Mar 23, 2022 | No storm report | 919 | 2% | 6.5 h | – | 4.8k |
| Aug 5, 2022 | Thunderstorms | 1,663 | 4% | 5.2 h | – | 4.4k |
| Jan 12, 2023 | Thunderstorms | 1,739 | 4% | 4.0 h | – | 4.3k |
| Aug 7, 2023 | Flooding | 2,943 | 7% | 3.5 h | 3.5 h | 4.1k |
| Mar 14, 2024 | No storm report | 1,613 | 4% | 5.5 h | – | 4.0k |
| Nov 28, 2022 | No storm report | 1,308 | 3% | 7.8 h | – | 3.8k |
| Mar 9, 2024 | Windstorm | 939 | 2% | 5.5 h | – | 3.6k |
| Aug 3, 2023 | No storm report | 3,193 | 8% | 1.2 h | 1.0 h | 3.5k |
| May 11, 2021 | No storm report | 2,270 | 6% | 1.5 h | 1.2 h | 3.4k |
| May 27, 2024 | No storm report | 3,239 | 8% | 1.0 h | 1.0 h | 3.0k |
| Jan 11, 2020 | Thunderstorms | 1,858 | 5% | 2.8 h | – | 3.0k |
| Aug 1, 2021 | No storm report | 901 | 2% | 3.2 h | – | 2.9k |
| Dec 24, 2020 | Winter storm | 859 | 2% | 4.5 h | – | 2.9k |
| Mar 3, 2024 | No storm report | 941 | 2% | 4.0 h | – | 2.8k |
After the peak
How fast the lights come back
Each line is one major outage, from its peak. The amber line is the typical path.
When it happens
The outage clock
Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.
What was happening
Weather behind the outages
Each outage is matched to NOAA storm reports for Greene from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Tropical storm 44%
- No storm on record 31%
- Thunderstorms 16%
- Windstorm 7.3%
- Winter storm 1.4%
- Flooding 0.9%
Who keeps the lights on
Utilities serving Greene
As each utility reports to the Energy Information Administration for its whole Tennessee territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Johnson City | Municipal | 101 | 100 | 0.88 | 13.2 | 73k |
| City of Greeneville | Municipal | 238 | 115 | 1.85 | 12.7 | 33k |
EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.
Next door
Neighbouring counties
- Madison, NC 28 h
- Hawkins 8.7 h
- Cocke 5.5 h
- Greene (this county) 3.5 h
- Washington 2.7 h
- Hamblen 1.6 h
- Unicoi 0.7 h
About these numbers
Notes
Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 39,858 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →