Power outage history
Johnson County Indiana
2.4hours
without power for the average customer in a typical year, 2018–2025
67th most of 90 in Indiana 64% 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 Johnson'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 6.0 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Johnson, 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 31, 2023 | Tornadoes | 7,559 | 13% | 2.2 d | 42 h | 206k |
| Apr 8, 2020 | Thunderstorms | 5,731 | 10% | 19 h | 7.5 h | 73k |
| Jun 29, 2023 | Thunderstorms | 2,449 | 4% | 48 h | – | 57k |
| Sep 27, 2024 | Hurricane Helene | 3,392 | 6% | 19 h | 8.5 h | 34k |
| Jun 18, 2025 | Thunderstorms | 3,032 | 5% | 21 h | 12 h | 31k |
| Oct 20, 2018 | No storm report | 3,545 | 6% | 20 h | 19 h | 30k |
| Jun 28, 2022 | No storm report | 7,523 | 13% | 6.2 h | 6.0 h | 26k |
| Dec 11, 2021 | Thunderstorms | 4,342 | 8% | 10 h | 4.2 h | 22k |
| Jan 7, 2022 | No storm report | 3,673 | 6% | 7.0 h | 8.0 h | 18k |
| May 26, 2024 | No storm report | 12,646 | 22% | 1.8 h | 1.8 h | 17k |
| Sep 28, 2023 | No storm report | 5,437 | 9% | 3.8 h | 3.8 h | 17k |
| Jul 27, 2020 | No storm report | 2,370 | 4% | 8.0 h | – | 12k |
| May 21, 2022 | Tornadoes | 1,369 | 2% | 10 h | – | 10k |
| Jun 25, 2023 | Tornadoes | 2,028 | 4% | 5.8 h | – | 9.8k |
| Apr 14, 2018 | No storm report | 3,583 | 6% | 3.0 h | 1.8 h | 8.9k |
| Jun 10, 2020 | No storm report | 1,941 | 3% | 5.2 h | – | 8.5k |
| Feb 24, 2019 | No storm report | 1,514 | 3% | 6.0 h | – | 8.3k |
| Oct 3, 2020 | No storm report | 4,849 | 8% | 2.5 h | 2.0 h | 7.8k |
| Mar 15, 2019 | No storm report | 869 | 2% | 9.0 h | – | 7.7k |
| Mar 26, 2021 | Windstorm | 2,629 | 5% | 3.2 h | – | 7.6k |
| Mar 25, 2020 | No storm report | 1,039 | 2% | 7.0 h | – | 7.3k |
| Jun 15, 2016 | No storm report | 2,138 | 4% | 4.2 h | – | 6.8k |
| Apr 17, 2021 | No storm report | 1,315 | 2% | 8.8 h | – | 6.2k |
| Apr 29, 2021 | No storm report | 1,952 | 3% | 3.5 h | – | 6.1k |
| Jun 23, 2019 | No storm report | 2,160 | 4% | 2.8 h | – | 5.9k |
| Jan 10, 2016 | No storm report | 2,648 | 5% | 2.8 h | – | 5.9k |
| Apr 30, 2019 | No storm report | 2,885 | 5% | 3.0 h | 3.2 h | 5.9k |
| Jun 21, 2018 | No storm report | 1,428 | 2% | 6.2 h | – | 5.8k |
| Apr 27, 2025 | No storm report | 2,462 | 4% | 2.5 h | – | 5.1k |
| Apr 9, 2021 | No storm report | 2,411 | 4% | 2.2 h | – | 5.0k |
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 Johnson from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 45%
- Tornadoes 27%
- Thunderstorms 22%
- Tropical storm 4.8%
- Windstorm 0.9%
Who keeps the lights on
Utilities serving Johnson
As each utility reports to the Energy Information Administration for its whole Indiana 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 Indiana, LLC | Investor Owned | 267 | 108 | 1.26 | 15.0 | 809k |
| AES Indiana | Investor Owned | 295 | 76 | 1.22 | 14.7 | 470k |
| Town of Bargersville | IN | – | – | – | – | 38k |
| Edinburgh Municipal Utilities | IN | – | – | – | – | 37k |
| South Central Indiana REMC | Cooperative | 1,196 | 349 | 3.96 | 17.5 | 35k |
| Johnson County Rural E M C | Cooperative | 122 | 42 | 1.24 | 13.4 | 29k |
| RushShelby Energy | Cooperative | 543 | 194 | 2.87 | 16.4 | 15k |
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
- Brown 25 h
- Morgan 7.9 h
- Bartholomew 7.3 h
- Marion 4.1 h
- Shelby 2.6 h
- Johnson (this county) 2.4 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 57,420 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 →