Power outage history
Montgomery County Tennessee
3.5hours
without power for the average customer in a typical year, 2018–2025
48th 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 Montgomery'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 11 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Montgomery, 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 |
|---|---|---|---|---|---|---|
| Mar 3, 2023 | Windstorm | 48,425 | 40% | 3.4 d | 43 h | 919k |
| Sep 1, 2017 | Hurricane Harvey | 2,547 | 2% | 6.0 d | – | 174k |
| May 26, 2024 | Thunderstorms | 18,123 | 15% | 28 h | 18 h | 140k |
| Oct 26, 2019 | Tropical Storm Olga | 13,206 | 11% | 30 h | 26 h | 136k |
| Jun 17, 2022 | Thunderstorms | 18,943 | 16% | 14 h | 8.2 h | 118k |
| Dec 9, 2023 | Tornadoes | 6,972 | 6% | 2.2 d | 2.6 d | 102k |
| Dec 23, 2022 | Winter storm | 13,522 | 11% | 11 h | 1.0 h | 57k |
| Dec 12, 2023 | No storm report | 5,296 | 4% | 22 h | 4.2 h | 55k |
| Oct 28, 2019 | No storm report | 6,322 | 5% | 10 h | 22 h | 33k |
| Jun 21, 2019 | Thunderstorms | 6,645 | 6% | 10 h | 10 h | 26k |
| Oct 9, 2019 | No storm report | 5,137 | 4% | 4.8 h | 13 h | 24k |
| Dec 11, 2021 | Thunderstorms | 5,914 | 5% | 6.2 h | 3.0 h | 23k |
| Apr 3, 2025 | Thunderstorms | 7,954 | 7% | 7.8 h | 7.2 h | 22k |
| May 30, 2018 | Tropical Storm Alberto | 6,446 | 5% | 4.5 h | 5.5 h | 21k |
| Dec 9, 2018 | Winter storm | 2,839 | 2% | 12 h | – | 20k |
| May 16, 2025 | Thunderstorms | 6,063 | 5% | 5.5 h | 7.5 h | 19k |
| Jun 2, 2021 | Thunderstorms | 4,550 | 4% | 8.2 h | – | 18k |
| May 16, 2025 | No storm report | 6,065 | 5% | 5.2 h | 3.2 h | 16k |
| Jun 11, 2023 | Thunderstorms | 5,306 | 4% | 6.2 h | 4.8 h | 16k |
| Mar 3, 2020 | No storm report | 6,703 | 6% | 4.8 h | 2.8 h | 15k |
| May 8, 2024 | Thunderstorms | 4,219 | 4% | 5.0 h | – | 15k |
| Apr 14, 2018 | No storm report | 2,862 | 2% | 8.0 h | – | 15k |
| May 3, 2020 | Thunderstorms | 6,549 | 5% | 4.2 h | 12 min | 14k |
| Nov 27, 2022 | No storm report | 5,311 | 4% | 5.2 h | 1.8 h | 12k |
| Feb 15, 2025 | Flooding | 2,831 | 2% | 9.8 h | – | 11k |
| Jul 30, 2024 | Thunderstorms | 3,361 | 3% | 3.8 h | – | 11k |
| Nov 12, 2020 | No storm report | 2,110 | 2% | 5.2 h | – | 11k |
| Aug 17, 2024 | Thunderstorms | 4,545 | 4% | 3.5 h | – | 10k |
| May 23, 2021 | No storm report | 3,609 | 3% | 3.0 h | – | 9.7k |
| May 25, 2020 | No storm report | 2,091 | 2% | 6.0 h | – | 8.9k |
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 Montgomery from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Windstorm 38%
- No storm on record 27%
- Thunderstorms 20%
- Tropical storm 6.8%
- Tornadoes 4.2%
- Winter storm 3.3%
- Flooding 0.6%
Who keeps the lights on
Utilities serving Montgomery
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 |
|---|---|---|---|---|---|---|
| Cumberland Elec Member Corp | Cooperative | 221 | 171 | 2.67 | 13.8 | 102k |
| City of Clarksville | Municipal | 117 | 101 | 1.18 | 13.7 | 78k |
| City of Dickson | Municipal | 391 | 202 | 2.46 | 13.0 | 31k |
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
- Todd, KY 20 h
- Stewart 14 h
- Cheatham 7.4 h
- Christian, KY 5.8 h
- Robertson 5.1 h
- Montgomery (this county) 3.5 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 119,925 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 →