Power Out Map
– 0% of Powder River out 0 customers out in Montana

Power outage history

Powder River County Montana

The outage record here is too thin for a reliable yearly average. Raw events are listed below.

Worst outage on record Nov 13, 2025 10% of customers out · 90% back in 5.5 hours
Hours without power, average customer per year –h / yr State average 4.9 h · national median 6.6 h
Major outages a year – Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 4hours Median across major outages, from the peak
Longest single outage 11hours Oct 2, 2024, over 1% of customers out
Outage hours on storm days 15% Share falling on days with a NOAA storm report here
Worst year –
Electricity customers 583 ORNL customer model · 0 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 Powder River'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

Powder River, hours without power per customer

Powder RiverUS median countyMontana average
0 2 4 6 8 ’16 ’17 ’18 ’19 ’20 ’21 ’22 ’23 ’24 ’25 US 6.6 MT 4.9

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
Oct 2, 2024 No storm report 29 5% 11 h – 326
Nov 13, 2025 No storm report 59 10% 6.0 h 5.5 h 264
Jul 13, 2025 No storm report 29 5% 8.5 h – 244
Apr 23, 2022 Winter storm 32 5% 6.8 h 6.8 h 208
Jul 13, 2017 No storm report 33 6% 4.8 h 4.8 h 157
Jun 12, 2022 No storm report 59 10% 3.8 h 1.8 h 127
Apr 12, 2021 No storm report 29 5% 4.2 h – 123
Jul 6, 2017 No storm report 33 6% 3.5 h 3.5 h 116
Jun 20, 2021 No storm report 32 5% 3.0 h 3.0 h 96
Sep 9, 2023 No storm report 30 5% 2.8 h 4.0 h 82
Aug 26, 2024 Wildfire 34 6% 2.5 h 5.0 h 80
Apr 28, 2022 No storm report 32 5% 2.5 h 12 h 80

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 +6h 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 Powder River from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • No storm on record 85%
  • Winter storm 9.0%
  • Wildfire 3.5%
  • Windstorm 2.8%

Who keeps the lights on

Utilities serving Powder River

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Tongue River Electric Coop Inc MT – – – 14.1 56k
Southeast Electric Coop, Inc MT 443 443 – – 19k
Powder River Energy Corp Cooperative – – – 13.2 51
Black Hills Power, Inc. Investor Owned 756 673 3.43 7.0 13

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 Montana

Where it is darkest

Hours / yr64+

All Montana 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 583 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 →