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

Power outage history

Boone County Iowa

8.7hours

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

14th most of 98 in Iowa 1.3× the national median

Worst outage on record Aug 10, 2020 91% of customers out · 90% back in 5.3 days
Hours without power, average customer per year 8.7h / yr State average 5.4 h · national median 6.6 h
Major outages a year 1.9 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 1hours Median across major outages, from the peak
Longest single outage 9.3days Aug 10, 2020, over 1% of customers out
Outage hours on storm days 90% Share falling on days with a NOAA storm report here
Worst year 2020 2.2 days without power, average customer
Electricity customers 10,670 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 Boone'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

2020 was the worst well-recorded year, at 2.2 days for the average customer. Hatched years have a thin record and are left out of the averages.

Boone, hours without power per customer

BooneUS median countyIowa average
0 5 10 15 20 1.9 ’15 1.5 ’16 1.4 ’17 1.6 ’18 1.7 ’19 53 ’20 6.0 ’21 1.6 ’22 1.5 ’23 1.2 ’24 3.1 ’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
Aug 10, 2020 Thunderstorms 9,757 91% 9.3 d 5.3 d 543k
Dec 15, 2021 Tornadoes 2,644 25% 2.7 d 48 h 50k
Mar 4, 2025 Winter storm 902 8% 39 h 16 h 17k
May 17, 2015 Thunderstorms 1,774 17% 3.0 h 1.0 h 5.3k
Feb 3, 2016 Winter storm 1,163 11% 5.2 h 4.5 h 4.7k
Aug 22, 2015 No storm report 2,578 24% 1.2 h 30 min 3.2k
Mar 6, 2017 Thunderstorms 497 5% 8.0 h – 3.0k
Nov 9, 2024 No storm report 1,592 15% 2.0 h 1.2 h 2.8k
Nov 13, 2020 No storm report 1,877 18% 2.2 h 1.2 h 2.7k
Oct 12, 2015 No storm report 1,641 15% 2.8 h 2.5 h 2.6k
Jun 29, 2017 No storm report 1,640 15% 1.5 h 1.8 h 2.5k
Jul 28, 2020 No storm report 283 3% 8.5 h – 2.4k

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 +2h 90% by +2h

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 Boone from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • Thunderstorms 80%
  • No storm on record 9.6%
  • Tornadoes 7.5%
  • Winter storm 2.8%

Who keeps the lights on

Utilities serving Boone

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
City of Story City IA – – – 12.1 17k
Midland Power Coop Cooperative 488 91 1.79 13.7 12k
City of Ogden IA – – – – 11k

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 10,670 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 →