Power Out Map
– 0% of Wheatland out 0 customers out in Montana

Power outage history

Wheatland County Montana

20hours

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

3rd most of 35 in Montana 3.0× the national median

Worst outage on record Jun 13, 2020 47% of customers out · 90% back in 42 hours
Hours without power, average customer per year 20h / yr State average 4.9 h · national median 6.6 h
Major outages a year 13.6 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 42hours Jun 13, 2020, over 1% of customers out
Outage hours on storm days 18% Share falling on days with a NOAA storm report here
Worst year 2020 2.1 days without power, average customer
Electricity customers 705 ORNL customer model · 5 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 Wheatland'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 2.1 days for the average customer. Hatched years have a thin record and are left out of the averages.

Wheatland, hours without power per customer

WheatlandUS median countyMontana average
0 20 40 60 51 ’20 16 ’21 11 ’22 ’23 9.6 ’24 11 ’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
Jun 13, 2020 No storm report 334 47% 42 h 42 h 14k
Jun 11, 2020 No storm report 705 100% 5.2 h 5.2 h 3.7k
Apr 18, 2020 No storm report 570 81% 12 h 11 h 3.6k
Sep 2, 2020 No storm report 529 75% 18 h 17 h 3.1k
Dec 17, 2025 No storm report 194 28% 21 h 1.5 h 3.1k
Jul 29, 2021 No storm report 705 100% 7.5 h 6.2 h 3.0k
Jul 14, 2020 No storm report 705 100% 4.0 h 9.8 h 2.8k
Jan 14, 2021 Windstorm 136 19% 18 h 16 h 2.1k
Apr 15, 2024 No storm report 292 41% 7.0 h 7.0 h 2.0k
Apr 27, 2023 No storm report 290 41% 9.8 h 9.8 h 1.7k
Aug 25, 2020 Thunderstorms 304 43% 7.2 h 12 h 1.5k
Nov 29, 2022 No storm report 284 40% 5.2 h 5.2 h 1.5k

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 +8h

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

  • No storm on record 82%
  • Windstorm 9.5%
  • Winter storm 5.5%
  • Thunderstorms 2.7%

Who keeps the lights on

Utilities serving Wheatland

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
NorthWestern Energy LLC Investor Owned 125 117 1.10 14.4 334k
Fergus Electric Coop, Inc Cooperative 480 284 3.03 15.9 6.9k

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 705 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 →