Power outage history
Blount County Tennessee
4.5hours
without power for the average customer in a typical year, 2018–2025
39th most of 73 in Tennessee 31% 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 Blount's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2022 was the worst well-recorded year, at 7.1 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Blount, 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 |
|---|---|---|---|---|---|---|
| Feb 16, 2015 | Winter storm | 8,212 | 12% | 4.0 d | 2.4 d | 402k |
| Jan 3, 2022 | Winter storm | 7,691 | 11% | 2.3 d | 2.0 d | 150k |
| Mar 3, 2023 | Thunderstorms | 13,526 | 19% | 30 h | 23 h | 131k |
| May 27, 2017 | Thunderstorms | 5,116 | 7% | 37 h | 36 h | 67k |
| Dec 24, 2020 | Winter storm | 6,678 | 9% | 26 h | 22 h | 66k |
| Aug 7, 2023 | Thunderstorms | 8,547 | 12% | 20 h | 17 h | 53k |
| Mar 4, 2025 | Windstorm | 5,688 | 8% | 20 h | 16 h | 43k |
| Mar 30, 2022 | Windstorm | 7,786 | 11% | 20 h | 5.5 h | 36k |
| Aug 27, 2025 | No storm report | 11,202 | 16% | 3.2 h | 2.8 h | 35k |
| Mar 29, 2020 | Thunderstorms | 7,309 | 10% | 8.8 h | 6.2 h | 34k |
| Jan 11, 2020 | Thunderstorms | 6,431 | 9% | 15 h | 8.2 h | 33k |
| Jun 21, 2019 | Thunderstorms | 6,356 | 9% | 10 h | 8.0 h | 31k |
| Jan 12, 2024 | Windstorm | 4,658 | 7% | 13 h | 12 h | 30k |
| Dec 30, 2019 | Thunderstorms | 4,149 | 6% | 18 h | 14 h | 29k |
| May 4, 2017 | No storm report | 3,854 | 5% | 14 h | 14 h | 26k |
| Apr 1, 2023 | Thunderstorms | 4,466 | 6% | 12 h | 5.0 h | 24k |
| Jul 8, 2022 | No storm report | 9,100 | 13% | 5.5 h | 3.5 h | 24k |
| Dec 24, 2022 | No storm report | 7,520 | 11% | 6.8 h | 4.2 h | 24k |
| Feb 16, 2025 | Windstorm | 5,133 | 7% | 7.0 h | 5.8 h | 23k |
| Jul 31, 2020 | No storm report | 3,760 | 5% | 12 h | 13 h | 23k |
| Dec 18, 2025 | Thunderstorms | 8,324 | 12% | 7.0 h | 6.0 h | 22k |
| Jul 5, 2020 | Thunderstorms | 19,120 | 27% | 2.0 h | 48 min | 22k |
| Jun 25, 2023 | Thunderstorms | 4,104 | 6% | 8.5 h | 7.8 h | 20k |
| Dec 11, 2021 | Thunderstorms | 5,768 | 8% | 7.8 h | 6.5 h | 19k |
| Jan 12, 2023 | Thunderstorms | 6,556 | 9% | 5.2 h | 4.8 h | 18k |
| Jul 30, 2024 | Thunderstorms | 11,644 | 17% | 2.5 h | 2.0 h | 18k |
| May 8, 2024 | Thunderstorms | 3,950 | 6% | 5.8 h | 9.2 h | 17k |
| Feb 28, 2024 | Thunderstorms | 2,839 | 4% | 9.5 h | – | 17k |
| Nov 13, 2024 | No storm report | 2,128 | 3% | 13 h | – | 16k |
| Mar 25, 2023 | Thunderstorms | 4,980 | 7% | 6.0 h | 6.5 h | 16k |
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 Blount from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 40%
- Thunderstorms 34%
- Winter storm 15%
- Windstorm 8.8%
- Tropical storm 1.4%
- Flooding 0.9%
Who keeps the lights on
Utilities serving Blount
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 |
|---|---|---|---|---|---|---|
| Knoxville Utilities Board | Municipal | 274 | 149 | 1.26 | 13.8 | 197k |
| Sevier County Electric System | Municipal | 376 | 174 | 2.63 | 12.1 | 36k |
| Fort Loudoun Electric Coop | Cooperative | 530 | 433 | 2.83 | 12.8 | 31k |
| City of Alcoa Utilities | Municipal | – | – | – | 13.0 | 28k |
| Maryville Utilities | Municipal | 78 | 54 | 1.01 | 12.1 | 19k |
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
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 70,519 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 →