Power outage history
Johnson County Arkansas
4.6hours
without power for the average customer in a typical year, 2018–2025
63rd most of 73 in Arkansas 30% 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
2019 was the worst well-recorded year, at 9.1 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 |
|---|---|---|---|---|---|---|
| May 1, 2019 | Thunderstorms | 3,506 | 19% | 34 h | 29 h | 45k |
| May 18, 2025 | Thunderstorms | 2,255 | 12% | 34 h | 32 h | 32k |
| May 18, 2019 | Thunderstorms | 2,831 | 15% | 25 h | 22 h | 29k |
| Feb 16, 2021 | No storm report | 1,564 | 8% | 31 h | 28 h | 26k |
| Jun 11, 2019 | No storm report | 6,008 | 32% | 4.2 h | 3.8 h | 24k |
| Aug 18, 2024 | Thunderstorms | 1,124 | 6% | 21 h | 17 h | 21k |
| Jan 24, 2023 | Winter storm | 1,301 | 7% | 23 h | 12 h | 17k |
| Jan 22, 2020 | No storm report | 926 | 5% | 22 h | – | 15k |
| Sep 4, 2023 | No storm report | 1,424 | 8% | 18 h | 17 h | 15k |
| Jun 26, 2024 | No storm report | 1,691 | 9% | 9.2 h | 8.5 h | 13k |
| Feb 23, 2022 | No storm report | 945 | 5% | 16 h | 11 h | 10k |
| Jun 23, 2019 | Thunderstorms | 631 | 3% | 28 h | – | 9.7k |
| Feb 27, 2023 | No storm report | 1,613 | 9% | 6.5 h | 5.0 h | 9.2k |
| Apr 15, 2019 | No storm report | 2,362 | 13% | 4.2 h | 4.0 h | 9.0k |
| Oct 25, 2025 | No storm report | 2,480 | 13% | 6.8 h | 3.0 h | 9.0k |
| May 15, 2022 | Thunderstorms | 2,463 | 13% | 5.2 h | 3.8 h | 6.8k |
| May 20, 2024 | No storm report | 3,161 | 17% | 2.0 h | 11 h | 6.0k |
| Oct 31, 2025 | No storm report | 1,012 | 5% | 5.8 h | 3.5 h | 5.8k |
| Sep 13, 2020 | No storm report | 711 | 4% | 8.0 h | – | 5.7k |
| Nov 26, 2019 | No storm report | 1,955 | 10% | 6.8 h | 2.0 h | 5.5k |
| May 7, 2024 | Thunderstorms | 900 | 5% | 9.2 h | – | 5.1k |
| Dec 16, 2019 | No storm report | 1,431 | 8% | 5.2 h | 2.2 h | 5.1k |
| Mar 14, 2025 | No storm report | 1,345 | 7% | 3.8 h | 2.8 h | 4.7k |
| May 2, 2022 | Thunderstorms | 1,316 | 7% | 3.5 h | 3.8 h | 4.5k |
| Nov 27, 2019 | No storm report | 900 | 5% | 6.5 h | – | 3.9k |
| Aug 26, 2023 | Thunderstorms | 1,105 | 6% | 8.5 h | 6.8 h | 3.8k |
| Oct 8, 2023 | No storm report | 1,275 | 7% | 3.0 h | 1.2 h | 3.8k |
| Dec 14, 2024 | No storm report | 1,119 | 6% | 3.2 h | 6.0 h | 3.6k |
| May 8, 2019 | No storm report | 1,133 | 6% | 3.2 h | 3.0 h | 3.6k |
| Apr 29, 2021 | Flooding | 1,672 | 9% | 3.0 h | 3.5 h | 3.5k |
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 Johnson from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 61%
- Thunderstorms 34%
- Winter storm 3.4%
- Flooding 1.0%
Who keeps the lights on
Utilities serving Johnson
As each utility reports to the Energy Information Administration for its whole Arkansas 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 Arkansas LLC | Investor Owned | 518 | 252 | 2.24 | 13.4 | 612k |
| Oklahoma Gas & Electric Co | Investor Owned | 217 | 155 | 1.63 | 11.7 | 59k |
| Arkansas Valley Elec Coop Corp | Cooperative | 322 | 250 | 2.85 | 14.1 | 55k |
| Clarksville Connected Utilities | Municipal | – | – | – | 10.4 | 3.8k |
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 18,727 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 →