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

Power outage history

Jefferson County Idaho

6.0hours

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

15th most of 35 in Idaho close to the national median

Worst outage on record Sep 7, 2020 30% of customers out · 90% back in 20 hours
Hours without power, average customer per year 6.0h / yr State average 3.7 h · national median 6.6 h
Major outages a year 5.1 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 38hours Sep 7, 2020, over 1% of customers out
Outage hours on storm days 32% Share falling on days with a NOAA storm report here
Worst year 2020 11 hours without power, average customer
Electricity customers 8,995 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 Jefferson'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 11 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Jefferson, hours without power per customer

JeffersonUS median countyIdaho average
0 5 10 15 1.8 ’17 4.2 ’18 4.4 ’19 11 ’20 4.2 ’21 4.1 ’22 4.8 ’23 8.7 ’24 6.4 ’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
Sep 7, 2020 Windstorm 2,686 30% 38 h 20 h 33k
Jan 23, 2020 No storm report 8,995 100% 3.0 h 1.8 h 16k
Jun 7, 2024 Thunderstorms 5,191 58% 22 h 11 h 16k
Mar 2, 2024 Winter storm 3,010 33% 16 h 5.0 h 14k
Apr 3, 2019 No storm report 5,030 56% 2.5 h 2.2 h 9.6k
Oct 2, 2025 No storm report 2,333 26% 4.0 h 5.0 h 9.3k
Apr 17, 2018 No storm report 908 10% 15 h 15 h 8.3k
Jun 19, 2025 No storm report 3,219 36% 8.5 h 2.5 h 7.6k
Oct 1, 2024 No storm report 2,131 24% 7.0 h 3.2 h 6.0k
Sep 17, 2025 No storm report 1,863 21% 5.0 h 2.8 h 5.9k
Feb 25, 2025 No storm report 2,672 30% 2.0 h 2.0 h 5.2k
May 28, 2020 No storm report 8,995 100% 2.5 h 48 min 5.1k

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

  • No storm on record 69%
  • Windstorm 14%
  • Winter storm 9.2%
  • Thunderstorms 8.0%

Who keeps the lights on

Utilities serving Jefferson

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
Bonneville Power Administration Federal – – – – –

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 8,995 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 →