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

Power outage history

Lewis County Idaho

6.8hours

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

13th most of 35 in Idaho close to the national median

Worst outage on record Aug 29, 2015 100% of customers out · 90% back in 22 hours
Hours without power, average customer per year 6.8h / yr State average 3.7 h · national median 6.6 h
Major outages a year 4.8 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 5.6days Dec 17, 2025, over 1% of customers out
Outage hours on storm days 35% Share falling on days with a NOAA storm report here
Worst year 2025 16 hours without power, average customer
Electricity customers 1,808 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 Lewis'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 16 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Lewis, hours without power per customer

LewisUS median countyIdaho average
0 10 20 30 40 50 41 ’15 5.0 ’16 21 ’17 6.4 ’18 9.7 ’19 6.8 ’20 3.0 ’21 4.2 ’22 3.9 ’23 4.5 ’24 16 ’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
Aug 29, 2015 Wildfire 1,808 100% 32 h 22 h 29k
Dec 17, 2025 Windstorm 897 50% 5.6 d 3.7 d 21k
Aug 30, 2017 Thunderstorms 1,298 72% 16 h 14 h 18k
Aug 29, 2017 Thunderstorms 1,808 100% 16 h 6.0 h 11k
Oct 26, 2015 No storm report 1,808 100% 4.2 h 4.2 h 6.3k
May 20, 2015 No storm report 1,114 62% 4.5 h 6.5 h 4.9k
Aug 5, 2015 No storm report 1,808 100% 5.5 h 3.5 h 4.1k
May 22, 2015 No storm report 1,808 100% 2.5 h 2.2 h 4.1k
Dec 16, 2016 No storm report 222 12% 17 h 2.2 h 2.6k
Dec 17, 2024 No storm report 822 45% 4.2 h 1.5 h 2.5k
Nov 2, 2018 No storm report 624 35% 3.5 h 1.2 h 2.1k
Feb 2, 2015 No storm report 1,382 76% 1.5 h 1.2 h 2.1k

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

  • No storm on record 66%
  • Windstorm 30%
  • Winter storm 2.2%
  • Thunderstorms 1.4%
  • Wildfire 0.7%
  • Flooding 0.6%

Who keeps the lights on

Utilities serving Lewis

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
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

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 1,808 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 →