Power outage history
Coles County Illinois
2.3hours
without power for the average customer in a typical year, 2018–2025
83rd most of 101 in Illinois 65% 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 Coles'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 5.8 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Coles, 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 |
|---|---|---|---|---|---|---|
| Jun 29, 2023 | Thunderstorms | 9,390 | 38% | 3.0 d | 29 h | 121k |
| Dec 10, 2021 | Tornadoes | 4,329 | 18% | 19 h | 13 h | 33k |
| Jul 13, 2016 | Thunderstorms | 8,551 | 35% | 9.5 h | 4.8 h | 24k |
| Jun 18, 2025 | Thunderstorms | 2,233 | 9% | 26 h | 25 h | 20k |
| Mar 15, 2025 | Tornadoes | 2,782 | 11% | 15 h | 14 h | 18k |
| Feb 24, 2016 | Winter storm | 6,112 | 25% | 14 h | 5.2 h | 17k |
| Mar 30, 2025 | No storm report | 5,432 | 22% | 4.5 h | 1.5 h | 10k |
| Sep 8, 2015 | No storm report | 8,078 | 33% | 3.0 h | 2.0 h | 9.4k |
| Jun 4, 2020 | No storm report | 3,320 | 14% | 4.2 h | 3.0 h | 9.3k |
| Mar 30, 2016 | No storm report | 5,185 | 21% | 2.5 h | 1.2 h | 8.4k |
| Oct 14, 2020 | No storm report | 3,893 | 16% | 2.0 h | 1.0 h | 6.5k |
| Jun 15, 2016 | Thunderstorms | 2,773 | 11% | 5.5 h | 2.5 h | 5.9k |
| Oct 22, 2021 | No storm report | 3,466 | 14% | 2.2 h | 2.0 h | 5.4k |
| Aug 15, 2016 | No storm report | 1,705 | 7% | 4.0 h | 2.0 h | 5.1k |
| Jul 15, 2021 | No storm report | 2,417 | 10% | 2.2 h | 1.8 h | 4.2k |
| Feb 16, 2025 | No storm report | 1,821 | 7% | 8.0 h | 4.8 h | 4.2k |
| Jun 7, 2015 | Thunderstorms | 841 | 3% | 7.5 h | – | 3.9k |
| Jan 9, 2024 | No storm report | 5,172 | 21% | 1.0 h | 12 min | 3.7k |
| Nov 25, 2025 | No storm report | 1,227 | 5% | 3.0 h | 2.8 h | 3.7k |
| Apr 8, 2020 | Thunderstorms | 989 | 4% | 9.0 h | – | 3.7k |
| Jul 4, 2015 | No storm report | 1,089 | 4% | 5.0 h | – | 3.6k |
| Nov 26, 2018 | No storm report | 2,000 | 8% | 1.8 h | 1.8 h | 3.5k |
| Mar 31, 2023 | Thunderstorms | 831 | 3% | 5.0 h | – | 3.4k |
| Apr 2, 2025 | Thunderstorms | 864 | 4% | 4.8 h | – | 3.2k |
| Mar 4, 2025 | No storm report | 2,985 | 12% | 2.0 h | 1.2 h | 3.2k |
| May 28, 2016 | No storm report | 2,831 | 12% | 2.0 h | 48 min | 3.2k |
| Nov 10, 2020 | No storm report | 1,008 | 4% | 4.5 h | – | 3.1k |
| Nov 21, 2015 | No storm report | 821 | 3% | 5.0 h | – | 2.7k |
| May 9, 2021 | No storm report | 2,379 | 10% | 1.8 h | 48 min | 2.6k |
| May 16, 2025 | Windstorm | 984 | 4% | 4.2 h | – | 2.5k |
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 Coles from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 48%
- No storm on record 34%
- Tornadoes 16%
- Windstorm 1.3%
Who keeps the lights on
Utilities serving Coles
As each utility reports to the Energy Information Administration for its whole Illinois territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Ameren Illinois Company | Investor Owned | 287 | 130 | 1.19 | 16.7 | 1.1M |
| Enerstar Power Corp | IL | 229 | 220 | 2.54 | – | 63k |
| Coles-Moultrie Electric Coop | Cooperative | – | – | – | 17.6 | 8.5k |
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
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 24,455 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 →