Power outage history
Jefferson County Florida
39hours
without power for the average customer in a typical year, 2018–2025
2nd most of 67 in Florida 5.9× 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 Jefferson's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2024 was the worst well-recorded year, at 6.6 days for the average customer. Hatched years have a thin record and are left out of the averages.
Jefferson, 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 |
|---|---|---|---|---|---|---|
| Sep 10, 2017 | Hurricane Irma | 7,283 | 100% | 6.6 d | 5.7 d | 705k |
| Sep 26, 2024 | Hurricane Helene | 7,283 | 100% | 7.9 d | 5.5 d | 602k |
| Aug 30, 2023 | Hurricane Idalia | 7,283 | 100% | 8.0 d | 4.0 d | 490k |
| Aug 5, 2024 | Hurricane Debby | 7,283 | 100% | 4.3 d | 3.4 d | 425k |
| Sep 1, 2016 | Hurricane Hermine | 6,142 | 84% | 3.9 d | 3.1 d | 266k |
| Oct 10, 2018 | Hurricane Michael | 6,727 | 92% | 2.4 d | 8.2 h | 197k |
| May 10, 2024 | Thunderstorms | 2,415 | 33% | 2.3 d | 37 h | 50k |
| Jan 9, 2024 | Thunderstorms | 3,850 | 53% | 34 h | 23 h | 37k |
| Jan 22, 2017 | Thunderstorms | 3,468 | 48% | 43 h | 11 h | 30k |
| Feb 25, 2015 | Thunderstorms | 4,886 | 67% | 9.2 h | 3.5 h | 27k |
| Apr 19, 2019 | Thunderstorms | 2,394 | 33% | 12 h | 9.5 h | 13k |
| Jun 17, 2023 | Thunderstorms | 1,967 | 27% | 15 h | 8.0 h | 12k |
| Sep 9, 2021 | Tropical Storm Mindy | 1,918 | 26% | 14 h | 12 h | 11k |
| Jan 21, 2025 | Winter storm | 1,169 | 16% | 17 h | 12 h | 11k |
| Jun 30, 2015 | Thunderstorms | 2,405 | 33% | 18 h | 7.8 h | 11k |
| Jun 14, 2023 | Thunderstorms | 962 | 13% | 27 h | 20 h | 11k |
| Aug 1, 2021 | No storm report | 915 | 13% | 15 h | 20 h | 9.4k |
| Nov 10, 2022 | Hurricane Nicole | 1,732 | 24% | 15 h | 2.5 h | 7.2k |
| Feb 6, 2020 | No storm report | 2,056 | 28% | 15 h | 3.5 h | 6.2k |
| May 20, 2020 | Thunderstorms | 759 | 10% | 13 h | 11 h | 5.5k |
| Jan 30, 2022 | No storm report | 1,026 | 14% | 7.2 h | 7.0 h | 5.2k |
| Dec 31, 2022 | No storm report | 975 | 13% | 6.8 h | 5.0 h | 5.0k |
| May 1, 2023 | No storm report | 1,291 | 18% | 3.8 h | 2.2 h | 4.8k |
| Mar 25, 2022 | No storm report | 921 | 13% | 5.0 h | 4.8 h | 4.6k |
| Jun 29, 2021 | Thunderstorms | 1,113 | 15% | 5.5 h | 3.2 h | 4.6k |
| Jun 21, 2021 | No storm report | 2,122 | 29% | 5.5 h | 5.5 h | 4.5k |
| Aug 25, 2017 | Thunderstorms | 1,216 | 17% | 10 h | 5.2 h | 4.3k |
| Apr 9, 2023 | No storm report | 436 | 6% | 9.5 h | 9.5 h | 4.1k |
| Apr 11, 2024 | Flooding | 789 | 11% | 12 h | 10 h | 4.1k |
| Apr 15, 2018 | Thunderstorms | 1,121 | 15% | 15 h | 12 min | 4.1k |
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 Jefferson from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Tropical storm 80%
- No storm on record 11%
- Thunderstorms 8.0%
- Winter storm 0.6%
Who keeps the lights on
Utilities serving Jefferson
As each utility reports to the Energy Information Administration for its whole Florida territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Duke Energy Florida, LLC | Investor Owned | 87 | 82 | 0.97 | 18.4 | 1.8M |
| Tri-County Electric Coop, Inc (FL) | Cooperative | 230 | 230 | 2.40 | 18.4 | 18k |
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
- Madison 43 h
- Jefferson (this county) 39 h
- Taylor 37 h
- Wakulla 25 h
- Leon 13 h
- Brooks, GA 11 h
- Thomas, GA 4.0 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 7,283 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 →