Power outage history
Harrison County Mississippi
7.6hours
without power for the average customer in a typical year, 2018–2025
49th most of 74 in Mississippi 1.2× 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 Harrison's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2020 was the worst well-recorded year, at 2.1 days for the average customer. Hatched years have a thin record and are left out of the averages.
Harrison, 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 |
|---|---|---|---|---|---|---|
| Oct 28, 2020 | Hurricane Zeta | 97,348 | 89% | 5.8 d | 3.4 d | 5.2M |
| Aug 29, 2021 | Hurricane Ida | 8,247 | 8% | 21 h | 6.2 h | 85k |
| Oct 7, 2017 | Hurricane Nate | 2,647 | 2% | 11 h | – | 23k |
| Apr 28, 2016 | Thunderstorms | 4,372 | 4% | 7.8 h | – | 20k |
| Sep 12, 2024 | Hurricane Francine | 3,992 | 4% | 8.5 h | – | 19k |
| Apr 10, 2024 | Thunderstorms | 6,146 | 6% | 4.5 h | 5.8 h | 14k |
| Apr 10, 2021 | Thunderstorms | 4,228 | 4% | 4.0 h | – | 11k |
| Jun 20, 2021 | Tropical Storm Claudette | 2,759 | 3% | 5.5 h | – | 9.8k |
| Jun 12, 2024 | No storm report | 2,337 | 2% | 4.0 h | – | 9.3k |
| Apr 18, 2019 | No storm report | 1,795 | 2% | 6.2 h | – | 9.1k |
| Jun 7, 2020 | Tropical Storm Cristobal | 4,643 | 4% | 5.5 h | – | 8.9k |
| Jun 13, 2021 | No storm report | 9,849 | 9% | 1.0 h | 48 min | 8.1k |
| Mar 10, 2016 | No storm report | 5,010 | 5% | 1.8 h | 2.2 h | 7.5k |
| Jul 28, 2023 | No storm report | 2,927 | 3% | 3.8 h | – | 7.4k |
| Dec 8, 2020 | No storm report | 2,732 | 3% | 2.5 h | – | 6.8k |
| Sep 7, 2023 | Thunderstorms | 3,618 | 3% | 2.2 h | – | 6.3k |
| Apr 19, 2020 | Thunderstorms | 3,262 | 3% | 3.5 h | – | 6.1k |
| May 3, 2025 | No storm report | 3,614 | 3% | 1.8 h | – | 6.0k |
| Jul 16, 2023 | Heat | 4,279 | 4% | 2.0 h | – | 5.6k |
| Mar 30, 2022 | Thunderstorms | 2,710 | 2% | 2.5 h | – | 5.6k |
| Jul 1, 2025 | Thunderstorms | 2,586 | 2% | 2.8 h | – | 5.3k |
| Jan 9, 2024 | Thunderstorms | 2,985 | 3% | 4.5 h | – | 5.2k |
| Sep 6, 2022 | No storm report | 2,879 | 3% | 3.8 h | – | 5.0k |
| Oct 16, 2022 | No storm report | 2,886 | 3% | 1.8 h | – | 5.0k |
| Mar 27, 2024 | No storm report | 2,578 | 2% | 3.5 h | – | 4.8k |
| Aug 14, 2024 | No storm report | 3,488 | 3% | 2.2 h | – | 4.8k |
| Jun 19, 2021 | Tropical Storm Claudette | 4,104 | 4% | 2.8 h | – | 4.3k |
| Jul 20, 2023 | Heat | 4,499 | 4% | 1.2 h | – | 4.3k |
| Jul 23, 2025 | Heat | 1,883 | 2% | 2.5 h | – | 4.3k |
| Nov 26, 2020 | No storm report | 2,304 | 2% | 3.0 h | – | 4.2k |
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 Harrison from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Tropical storm 94%
- No storm on record 4.5%
- Thunderstorms 1.1%
Who keeps the lights on
Utilities serving Harrison
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 |
|---|---|---|---|---|---|---|
| Mississippi Power Co | Investor Owned | 105 | 76 | 1.03 | 15.7 | 158k |
| Coast Electric Power Assn | Cooperative | 121 | 83 | 1.70 | 14.0 | 84k |
| Singing River Elec Cooperative | Cooperative | 156 | 156 | – | 13.5 | 73k |
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
- Stone 12 h
- Hancock 8.7 h
- Jackson 8.6 h
- Harrison (this county) 7.6 h
- Pearl River 7.2 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 109,081 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 →