Power outage history
Madison County Tennessee
3.9hours
without power for the average customer in a typical year, 2018–2025
45th most of 73 in Tennessee 41% 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 Madison'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 7.6 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Madison, 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 30, 2022 | Thunderstorms | 14,035 | 23% | 41 h | 21 h | 161k |
| Mar 3, 2023 | Windstorm | 22,159 | 36% | 24 h | 7.0 h | 88k |
| May 6, 2021 | No storm report | 15,763 | 26% | 27 h | 7.2 h | 68k |
| May 3, 2020 | Thunderstorms | 9,829 | 16% | 18 h | 13 h | 59k |
| Dec 24, 2022 | Winter storm | 18,688 | 30% | 5.8 h | 48 min | 56k |
| Feb 24, 2022 | Ice storm | 8,121 | 13% | 12 h | 8.5 h | 39k |
| Jul 31, 2021 | Heat | 7,758 | 13% | 14 h | 10 h | 38k |
| Jul 15, 2025 | No storm report | 13,911 | 23% | 2.2 h | 11 h | 26k |
| Jun 20, 2019 | Thunderstorms | 4,922 | 8% | 12 h | 9.5 h | 24k |
| Jul 19, 2019 | No storm report | 992 | 2% | 24 h | – | 24k |
| Aug 31, 2017 | Hurricane Harvey | 4,513 | 7% | 13 h | 8.5 h | 23k |
| Jun 19, 2025 | Thunderstorms | 5,391 | 9% | 7.8 h | 5.0 h | 22k |
| Jul 9, 2024 | Hurricane Beryl | 5,708 | 9% | 3.5 h | 1.2 h | 19k |
| Mar 24, 2023 | Thunderstorms | 5,215 | 8% | 7.5 h | 7.0 h | 18k |
| Jun 13, 2022 | Heat | 9,078 | 15% | 2.2 h | 48 min | 16k |
| Dec 23, 2022 | Winter storm | 10,906 | 18% | 2.2 h | 1.0 h | 14k |
| Dec 11, 2021 | Tornadoes | 1,890 | 3% | 8.5 h | – | 12k |
| Sep 30, 2019 | No storm report | 4,777 | 8% | 3.2 h | 1.5 h | 12k |
| Oct 16, 2021 | No storm report | 2,658 | 4% | 6.8 h | – | 12k |
| Jul 4, 2018 | Thunderstorms | 3,036 | 5% | 5.5 h | – | 11k |
| Aug 16, 2017 | No storm report | 831 | 1% | 13 h | – | 10k |
| Jan 5, 2023 | No storm report | 3,285 | 5% | 4.0 h | 1.8 h | 9.6k |
| May 20, 2025 | Tornadoes | 4,181 | 7% | 3.8 h | 2.5 h | 9.4k |
| Jun 26, 2022 | No storm report | 2,931 | 5% | 4.0 h | – | 9.4k |
| Jun 12, 2021 | No storm report | 2,086 | 3% | 4.8 h | – | 9.3k |
| Aug 5, 2023 | Heat | 3,775 | 6% | 3.0 h | 2.5 h | 8.5k |
| Jun 6, 2025 | Thunderstorms | 1,741 | 3% | 11 h | – | 7.9k |
| Nov 13, 2021 | No storm report | 2,051 | 3% | 5.8 h | – | 7.1k |
| May 25, 2025 | No storm report | 2,718 | 4% | 4.2 h | – | 6.7k |
| May 4, 2020 | Thunderstorms | 2,889 | 5% | 4.8 h | – | 6.7k |
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 Madison from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 43%
- Thunderstorms 29%
- Windstorm 7.1%
- Heat 7.1%
- Winter storm 6.9%
- Ice storm 3.2%
- Tornadoes 1.8%
- Tropical storm 1.6%
- Flooding 0.5%
Who keeps the lights on
Utilities serving Madison
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 |
|---|---|---|---|---|---|---|
| Southwest Tennessee E M C | Cooperative | 701 | 234 | 3.98 | 13.7 | 44k |
| City of Jackson | Municipal | 186 | 186 | 1.54 | 12.6 | 32k |
| Gibson Electric Members Corp | Cooperative | 312 | 140 | 2.71 | 13.7 | 29k |
| City of Milan | Municipal | 12,532 | – | 1.20 | 13.0 | 6.9k |
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.
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 61,454 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 →