Power Out Map
– 0% of Appanoose out 0 customers out in Iowa

Power outage history

Appanoose County Iowa

5.5hours

without power for the average customer in a typical year, 2018–2025

26th most of 98 in Iowa 16% below the national median

Worst outage on record Mar 6, 2017 49% of customers out · 90% back in 44 hours
Hours without power, average customer per year 5.5h / yr State average 5.4 h · national median 6.6 h
Major outages a year 2.8 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 2hours Median across major outages, from the peak
Longest single outage 46hours Mar 6, 2017, over 1% of customers out
Outage hours on storm days 45% Share falling on days with a NOAA storm report here
Worst year 2021 10 hours without power, average customer
Electricity customers 6,572 ORNL customer model · 8 well-covered years

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 Appanoose's customers who were without power at that day's worst moment.

20152016201720182019202020212022202320242025
0%100% of customers out

Year by year

Hours in the dark, per customer

2021 was the worst well-recorded year, at 10 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Appanoose, hours without power per customer

AppanooseUS median countyIowa average
0 5 10 15 1.9 ’15 1.8 ’16 11 ’17 2.5 ’18 6.3 ’19 2.7 ’20 10 ’21 3.3 ’22 7.3 ’23 8.9 ’24 2.7 ’25 US 6.6 IA 5.4

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 6, 2017 Tornadoes 3,222 49% 46 h 44 h 62k
Dec 15, 2021 Thunderstorms 5,385 82% 22 h 9.8 h 41k
Jun 29, 2023 Thunderstorms 5,301 81% 7.2 h 2.2 h 25k
Jul 20, 2019 Heat 2,098 32% 12 h 7.8 h 7.6k
Jun 25, 2024 No storm report 1,149 17% 13 h 13 h 7.5k
Jul 30, 2024 Thunderstorms 2,465 38% 5.2 h 4.5 h 5.8k
Jul 6, 2024 No storm report 1,402 21% 33 h 1.5 h 5.4k
Jul 31, 2024 Thunderstorms 2,032 31% 5.8 h 4.2 h 4.5k
Apr 30, 2023 No storm report 1,125 17% 3.5 h 3.2 h 3.5k
May 24, 2021 No storm report 1,207 18% 2.8 h 2.8 h 3.2k
Jan 12, 2024 Winter storm 701 11% 17 h 12 min 3.1k
Jul 14, 2024 No storm report 116 2% 28 h – 2.9k

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.

0% 25% 50% 75% 100% peak+24h+48h+72h+96h half back by +4h 90% by +6h

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

00061218 Jan inside

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Appanoose from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • No storm on record 55%
  • Thunderstorms 36%
  • Heat 4.5%
  • Winter storm 2.0%
  • Flooding 0.9%
  • Ice storm 0.6%

Who keeps the lights on

Utilities serving Appanoose

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
Southern Iowa Elec Coop, Inc IA 177 177 1.66 15.7 61k
Chariton Valley Elec Coop, Inc IA 204 161 1.99 13.2 58k

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

Across Iowa

Where it is darkest

Hours / yr64+

All Iowa 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 6,572 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 →