Power outage history
Montgomery County Mississippi
17hours
without power for the average customer in a typical year, 2018–2025
21st most of 74 in Mississippi 2.7× 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 3.1 days 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 24, 2023 | Tornadoes | 3,558 | 83% | 4.1 d | 4.0 d | 290k |
| Apr 12, 2020 | Thunderstorms | 2,569 | 60% | 2.8 d | 2.3 d | 69k |
| Apr 30, 2017 | Tornadoes | 1,551 | 36% | 3.9 d | 3.4 d | 54k |
| Feb 25, 2015 | Winter storm | 1,762 | 41% | 43 h | 6.0 h | 30k |
| Mar 15, 2025 | Tornadoes | 583 | 14% | 45 h | 44 h | 26k |
| Mar 28, 2018 | No storm report | 806 | 19% | 16 h | 16 h | 11k |
| Nov 28, 2016 | Thunderstorms | 2,495 | 58% | 24 h | 7.5 h | 8.5k |
| Apr 3, 2023 | No storm report | 3,162 | 74% | 2.2 h | 2.0 h | 7.1k |
| Jun 5, 2020 | Thunderstorms | 1,252 | 29% | 17 h | 5.0 h | 6.0k |
| Jan 17, 2018 | No storm report | 560 | 13% | 10 h | 5.0 h | 5.5k |
| Mar 17, 2019 | No storm report | 534 | 12% | 9.2 h | 9.2 h | 4.7k |
| Jul 4, 2020 | No storm report | 1,417 | 33% | 5.8 h | 2.0 h | 4.6k |
| Oct 10, 2020 | Hurricane Delta | 654 | 15% | 15 h | 12 h | 4.5k |
| May 25, 2025 | Thunderstorms | 369 | 9% | 45 h | 21 h | 4.4k |
| Mar 5, 2015 | Ice storm | 840 | 20% | 4.5 h | 4.5 h | 3.8k |
| Aug 8, 2023 | No storm report | 564 | 13% | 6.8 h | 2.5 h | 3.7k |
| Aug 8, 2022 | No storm report | 1,507 | 35% | 4.5 h | 48 min | 3.6k |
| Sep 6, 2023 | Thunderstorms | 948 | 22% | 15 h | 1.0 h | 3.5k |
| Jun 20, 2019 | Thunderstorms | 387 | 9% | 17 h | 8.2 h | 3.4k |
| Jun 26, 2022 | No storm report | 779 | 18% | 4.0 h | 3.8 h | 3.1k |
| Jun 25, 2019 | No storm report | 852 | 20% | 3.5 h | 3.5 h | 3.0k |
| Apr 1, 2016 | No storm report | 534 | 12% | 5.8 h | 4.5 h | 2.9k |
| Aug 31, 2017 | Hurricane Harvey | 183 | 4% | 19 h | – | 2.8k |
| Aug 4, 2022 | No storm report | 787 | 18% | 3.8 h | 3.8 h | 2.8k |
| Jun 4, 2020 | No storm report | 535 | 13% | 5.0 h | 6.5 h | 2.7k |
| Sep 25, 2022 | No storm report | 470 | 11% | 16 h | 15 h | 2.6k |
| May 25, 2016 | No storm report | 2,572 | 60% | 1.2 h | 48 min | 2.5k |
| May 24, 2025 | No storm report | 566 | 13% | 4.5 h | 3.5 h | 2.4k |
| Feb 17, 2021 | Winter storm | 185 | 4% | 17 h | – | 2.4k |
| Jul 9, 2022 | No storm report | 209 | 5% | 23 h | – | 2.3k |
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.
- Tornadoes 57%
- No storm on record 24%
- Thunderstorms 17%
- Tropical storm 1.0%
- Winter storm 0.6%
Who keeps the lights on
Utilities serving Montgomery
As each utility reports to the Energy Information Administration for its whole Mississippi territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Entergy Mississippi LLC | Investor Owned | 640 | 410 | 2.61 | 13.9 | 384k |
| Delta Electric Power Assn | Cooperative | 1,941 | 578 | 5.81 | 12.7 | 21k |
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 4,275 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 →