Power Out Map
– 0% of Idaho out 0 customers out in Idaho

Power outage history

Idaho County Idaho

11hours

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

8th most of 35 in Idaho 1.6× the national median

Worst outage on record Dec 17, 2025 43% of customers out · 90% back in 2.4 days
Hours without power, average customer per year 11h / yr State average 3.7 h · national median 6.6 h
Major outages a year 5.4 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 5hours Median across major outages, from the peak
Longest single outage 4.5days Dec 17, 2025, over 1% of customers out
Outage hours on storm days 42% Share falling on days with a NOAA storm report here
Worst year 2025 25 hours without power, average customer
Electricity customers 9,920 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 Idaho'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

2025 was the worst well-recorded year, at 25 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Idaho, hours without power per customer

IdahoUS median countyIdaho average
0 10 20 30 7.4 ’15 4.4 ’16 9.5 ’17 2.6 ’18 8.3 ’19 12 ’20 14 ’21 7.4 ’22 8.3 ’23 7.6 ’24 25 ’25 US 6.6 ID 3.7

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
Dec 17, 2025 Windstorm 4,243 43% 4.5 d 2.4 d 84k
Dec 14, 2021 Winter storm 6,202 63% 18 h 11 h 62k
Feb 4, 2025 Winter storm 6,938 70% 30 h 16 h 49k
Jan 11, 2025 No storm report 797 8% 2.2 d 16 h 35k
Jul 24, 2024 Thunderstorms 2,486 25% 23 h 12 h 21k
Feb 18, 2016 Thunderstorms 652 7% 32 h 32 h 20k
Dec 29, 2017 Winter storm 770 8% 34 h 28 h 19k
Dec 11, 2023 Winter storm 715 7% 20 h 25 h 14k
Aug 17, 2020 No storm report 693 7% 21 h 6.2 h 14k
Nov 27, 2020 No storm report 1,464 15% 8.8 h 9.2 h 12k
Nov 10, 2019 No storm report 2,972 30% 4.0 h 4.0 h 12k
Aug 1, 2021 No storm report 678 7% 17 h 19 h 12k

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 +18h 90% by +18h

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

  • No storm on record 58%
  • Winter storm 26%
  • Windstorm 12%
  • Thunderstorms 4.0%

Who keeps the lights on

Utilities serving Idaho

As each utility reports to the Energy Information Administration for its whole Idaho territory, not this county alone. Outage minutes include major storm days.

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Idaho Power Co Investor Owned 171 141 1.03 11.8 540k
Avista Corp Investor Owned 973 208 1.89 11.8 129k
Clearwater Power Company ID 677 677 2.74 11.7 123k
Idaho County L&P Coop Assn, Inc ID – – – – 45k
Missoula Electric Coop, Inc Cooperative 8 1 0.15 10.5 44

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 Idaho

Where it is darkest

Hours / yr64+

All Idaho 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 9,920 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 →