Power outage history
Unicoi County Tennessee
0.7hours
without power for the average customer in a typical year, 2018–2025
71st most of 73 in Tennessee 89% 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 Unicoi's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2023 was the worst well-recorded year, at 1.3 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Unicoi, 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 |
|---|---|---|---|---|---|---|
| Apr 1, 2023 | No storm report | 692 | 6% | 18 h | 14 h | 11k |
| Aug 7, 2020 | No storm report | 649 | 5% | 17 h | 16 h | 4.4k |
| Jan 16, 2022 | No storm report | 746 | 6% | 7.5 h | 5.5 h | 3.4k |
| Jun 7, 2021 | No storm report | 677 | 6% | 3.5 h | 3.2 h | 2.1k |
| Aug 7, 2023 | Thunderstorms | 301 | 2% | 8.2 h | – | 1.9k |
| Mar 28, 2021 | No storm report | 879 | 7% | 2.0 h | 1.2 h | 1.5k |
| Jan 12, 2024 | No storm report | 240 | 2% | 6.2 h | – | 1.4k |
| Jan 17, 2022 | Winter storm | 481 | 4% | 2.5 h | – | 1.2k |
| Dec 24, 2020 | No storm report | 766 | 6% | 1.8 h | 1.0 h | 1.1k |
| Jan 15, 2024 | Winter storm | 623 | 5% | 1.8 h | 30 min | 1.0k |
| Aug 12, 2023 | Thunderstorms | 183 | 1% | 5.0 h | – | 911 |
| Feb 16, 2025 | No storm report | 639 | 5% | 1.8 h | 48 min | 832 |
| Jun 29, 2020 | No storm report | 660 | 5% | 1.2 h | 12 min | 790 |
| Oct 16, 2019 | No storm report | 169 | 1% | 3.0 h | – | 440 |
| Nov 30, 2022 | No storm report | 179 | 1% | 2.2 h | – | 383 |
| Feb 17, 2022 | No storm report | 187 | 2% | 2.0 h | – | 371 |
| Aug 2, 2021 | No storm report | 725 | 6% | 30 min | 12 min | 337 |
| Jun 30, 2023 | No storm report | 168 | 1% | 2.0 h | – | 305 |
| Sep 27, 2025 | No storm report | 138 | 1% | 1.8 h | – | 242 |
| Apr 15, 2025 | No storm report | 475 | 4% | 30 min | – | 156 |
| Aug 13, 2025 | No storm report | 126 | 1% | 1.0 h | – | 124 |
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 Unicoi from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 85%
- Thunderstorms 8.5%
- Winter storm 6.6%
Who keeps the lights on
Utilities serving Unicoi
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 |
|---|---|---|---|---|---|---|
| City of Elizabethton | Municipal | – | – | – | 12.3 | 23k |
| Mountain Electric Coop, Inc | Cooperative | 79 | 79 | 4.12 | 13.1 | 12k |
| Town of Erwin | Municipal | 109 | 0 | 0.96 | 13.1 | 7.7k |
| French Broad Elec Member Corp | Cooperative | – | – | – | 16.4 | 1.0k |
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
- Yancey, NC 78 h
- Mitchell, NC 59 h
- Madison, NC 28 h
- Greene 3.5 h
- Washington 2.7 h
- Unicoi (this county) 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 12,248 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 →