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

Power outage history

Clark County Idaho

7.3hours

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

11th most of 35 in Idaho close to the national median

Worst outage on record Jun 18, 2024 29% of customers out · 90% back in 17 hours
Hours without power, average customer per year 7.3h / yr State average 3.7 h · national median 6.6 h
Major outages a year 7.5 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 3hours Median across major outages, from the peak
Longest single outage 17hours Jun 18, 2024, over 1% of customers out
Outage hours on storm days 10% Share falling on days with a NOAA storm report here
Worst year 2024 13 hours without power, average customer
Electricity customers 685 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 Clark'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

2024 was the worst well-recorded year, at 13 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Clark, hours without power per customer

ClarkUS median countyIdaho average
0 5 10 15 ’17 8.5 ’18 3.8 ’19 9.7 ’20 6.7 ’21 2.2 ’22 7.9 ’23 13 ’24 6.5 ’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
Jun 18, 2024 No storm report 196 29% 17 h 17 h 3.2k
Aug 2, 2021 No storm report 478 70% 3.8 h 3.2 h 1.6k
Sep 16, 2023 No storm report 560 82% 2.5 h 4.8 h 1.4k
May 4, 2020 No storm report 96 14% 15 h 16 h 1.4k
Dec 29, 2020 No storm report 560 82% 2.0 h 2.0 h 1.1k
Nov 14, 2020 Winter storm 559 82% 2.0 h 2.0 h 1.1k
Dec 16, 2018 No storm report 547 80% 2.0 h 2.0 h 1.1k
Sep 7, 2020 Windstorm 84 12% 13 h 13 h 889
Aug 2, 2024 No storm report 129 19% 6.8 h 12 h 871
Sep 6, 2018 No storm report 268 39% 9.8 h 2.5 h 851
Jul 24, 2018 No storm report 244 36% 3.0 h 2.5 h 728
Oct 31, 2023 No storm report 197 29% 3.8 h 3.5 h 719

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 +4h

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

  • No storm on record 91%
  • Winter storm 4.0%
  • Windstorm 2.9%
  • Thunderstorms 2.6%

Who keeps the lights on

Utilities serving Clark

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
PacifiCorp Investor Owned 146 146 1.16 13.5 76k
Fall River Rural Elec Coop Inc Cooperative 7 7 0.06 11.1 16k
Vigilante Electric Coop, Inc MT – – – 14.4 141

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 685 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 →