Power outage history
Worth County Iowa
12hours
without power for the average customer in a typical year, 2018–2025
10th most of 98 in Iowa 1.8× 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 Worth'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 37 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Worth, 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 |
|---|---|---|---|---|---|---|
| Apr 10, 2019 | Windstorm | 2,289 | 100% | 5.1 d | 2.4 d | 79k |
| Dec 15, 2021 | Tornadoes | 2,289 | 100% | 2.1 d | 14 h | 35k |
| Jul 19, 2017 | Thunderstorms | 2,289 | 100% | 19 h | 30 min | 7.5k |
| Jul 27, 2025 | Thunderstorms | 375 | 16% | 20 h | 19 h | 5.6k |
| May 6, 2025 | No storm report | 1,696 | 74% | 3.5 h | 1.0 h | 5.5k |
| Jul 7, 2016 | Thunderstorms | 969 | 42% | 15 h | 11 h | 5.2k |
| Mar 24, 2018 | Winter storm | 1,090 | 48% | 7.0 h | 4.5 h | 4.8k |
| Mar 14, 2025 | No storm report | 1,847 | 81% | 4.8 h | 1.8 h | 3.7k |
| Jul 4, 2020 | No storm report | 1,234 | 54% | 3.5 h | 3.5 h | 3.6k |
| Jun 2, 2018 | No storm report | 969 | 42% | 11 h | 5.8 h | 3.4k |
| May 21, 2024 | Thunderstorms | 777 | 34% | 19 h | 5.8 h | 3.0k |
| Aug 14, 2020 | No storm report | 327 | 14% | 11 h | 7.2 h | 2.5k |
| Aug 3, 2018 | No storm report | 1,093 | 48% | 11 h | 1.8 h | 2.3k |
| Mar 5, 2025 | Winter storm | 205 | 9% | 15 h | 9.5 h | 2.2k |
| Feb 24, 2017 | Winter storm | 784 | 34% | 6.0 h | 30 min | 2.2k |
| Nov 14, 2021 | No storm report | 254 | 11% | 20 h | 20 h | 1.9k |
| Mar 9, 2024 | No storm report | 43 | 2% | 41 h | – | 1.8k |
| May 3, 2018 | No storm report | 1,352 | 59% | 1.2 h | 1.2 h | 1.7k |
| Sep 19, 2024 | Thunderstorms | 1,347 | 59% | 1.2 h | 1.2 h | 1.7k |
| May 17, 2019 | No storm report | 161 | 7% | 11 h | 11 h | 1.7k |
| Mar 3, 2024 | No storm report | 122 | 5% | 12 h | 12 h | 1.5k |
| Apr 27, 2017 | No storm report | 173 | 8% | 7.2 h | 6.2 h | 1.2k |
| Mar 28, 2025 | No storm report | 336 | 15% | 3.5 h | 30 min | 1.2k |
| Jul 4, 2022 | No storm report | 574 | 25% | 2.0 h | 2.0 h | 1.1k |
| Jun 30, 2025 | No storm report | 36 | 2% | 30 h | – | 1.1k |
| Apr 2, 2015 | No storm report | 559 | 24% | 2.0 h | 3.2 h | 1.0k |
| Aug 16, 2023 | No storm report | 100 | 4% | 11 h | – | 962 |
| Jul 5, 2022 | Thunderstorms | 344 | 15% | 3.2 h | 2.8 h | 945 |
| Feb 28, 2025 | No storm report | 290 | 13% | 3.8 h | 12 h | 940 |
| Apr 12, 2022 | Tornadoes | 194 | 8% | 17 h | 13 h | 931 |
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 Worth from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Windstorm 39%
- No storm on record 33%
- Tornadoes 18%
- Thunderstorms 6.2%
- Winter storm 3.8%
Who keeps the lights on
Utilities serving Worth
As each utility reports to the Energy Information Administration for its whole Iowa territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Interstate Power and Light Co | Investor Owned | 89 | 74 | 0.82 | 17.8 | 419k |
| Heartland Power Coop | Cooperative | 117 | 67 | 0.92 | 12.8 | 4.4k |
| Prairie Energy Coop | Cooperative | 428 | 121 | 3.11 | 14.1 | 3.4k |
| Grafton Electric | IA | – | – | – | – | 1.3k |
| Freeborn Mower Electric Cooperative | Cooperative | – | – | – | 14.6 | 6 |
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
- Worth (this county) 12 h
- Hancock 5.5 h
- Winnebago 4.5 h
- Mitchell 3.8 h
- Freeborn, MN 3.3 h
- Cerro Gordo 2.3 h
- Mower, MN 0.4 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 2,289 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 →