Power Out Map
– 0% of Crook out 0 customers out in Wyoming

Power outage history

Crook County Wyoming

18hours

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

1st most of 20 in Wyoming 2.7× the national median

Worst outage on record Aug 15, 2025 14% of customers out · 90% back in 6.8 days
Hours without power, average customer per year 18h / yr State average 2.4 h · national median 6.6 h
Major outages a year 9.3 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 7.0days Aug 15, 2025, over 1% of customers out
Outage hours on storm days 25% Share falling on days with a NOAA storm report here
Worst year 2025 31 hours without power, average customer
Electricity customers 4,545 ORNL customer model · 6 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 Crook'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 31 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Crook, hours without power per customer

CrookUS median countyWyoming average
0 10 20 30 40 ’16 ’18 ’19 14 ’20 9.7 ’21 11 ’22 18 ’23 23 ’24 31 ’25 US 6.6 WY 2.4

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 15, 2025 No storm report 629 14% 7.0 d 6.8 d 55k
May 6, 2024 Winter storm 3,981 88% 42 h 8.2 h 37k
Sep 16, 2023 No storm report 1,273 28% 2.1 d 2.5 h 37k
Nov 13, 2025 No storm report 4,545 100% 10 h 5.0 h 24k
Oct 29, 2024 Winter storm 2,500 55% 24 h 48 min 17k
Sep 14, 2022 No storm report 1,389 31% 12 h 11 h 17k
Sep 9, 2025 No storm report 1,112 24% 13 h 13 h 14k
Jun 18, 2020 No storm report 1,241 27% 15 h 30 min 11k
Nov 23, 2023 Winter storm 518 11% 2.7 d 2.6 d 10k
Jun 23, 2021 No storm report 900 20% 14 h 14 h 9.8k
Sep 5, 2025 No storm report 533 12% 2.6 d 48 min 9.2k
Sep 3, 2025 No storm report 550 12% 22 h 1.2 h 8.1k

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 +8h 90% by +14h

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

  • No storm on record 75%
  • Winter storm 17%
  • Thunderstorms 7.7%
  • Windstorm 0.5%

Who keeps the lights on

Utilities serving Crook

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Powder River Energy Corp Cooperative 571 271 3.50 12.2 16k
City of Gillette Municipal – – – 12.9 14k
Black Hills Power, Inc. Investor Owned 68 13 1.25 13.8 2.2k
Southeast Electric Coop, Inc MT – – – – 157

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 Wyoming

Where it is darkest

Hours / yr64+

All Wyoming 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 4,545 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 →