Power Out Map
– 0% of Sheridan out 0 customers out in North Dakota

Power outage history

Sheridan County North Dakota

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

Worst outage on record Jun 20, 2025 62% of customers out · 90% back in 11 hours
Hours without power, average customer per year –h / yr State average 2.1 h · national median 6.6 h
Major outages a year – 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 11hours Jun 20, 2025, over 1% of customers out
Outage hours on storm days 31% Share falling on days with a NOAA storm report here
Worst year –
Electricity customers 641 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 Sheridan'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

Sheridan, hours without power per customer

SheridanUS median countyNorth Dakota average
0 2 4 6 8 10 12 ’20 ’21 ’22 ’23 ’24 ’25 US 6.6 ND 2.1

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 20, 2025 Thunderstorms 400 62% 11 h 11 h 3.6k
Aug 12, 2023 No storm report 305 48% 6.5 h 6.5 h 2.0k
Jul 7, 2020 No storm report 641 100% 6.0 h 5.2 h 998
Apr 21, 2024 No storm report 301 47% 2.2 h 2.2 h 677
Oct 30, 2023 No storm report 303 47% 3.0 h 1.5 h 640
Jun 30, 2020 No storm report 577 90% 48 min 1.0 h 433
Oct 31, 2020 Windstorm 415 65% 1.0 h 1.0 h 415
Dec 12, 2025 No storm report 409 64% 1.0 h 48 min 406
May 9, 2023 No storm report 302 47% 1.5 h 1.2 h 402
Sep 23, 2022 No storm report 312 49% 1.2 h 1.2 h 390
May 17, 2024 No storm report 425 66% 1.0 h 30 min 356
Oct 30, 2025 No storm report 293 46% 2.5 h 2.5 h 328

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 +2h

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

  • No storm on record 69%
  • Thunderstorms 26%
  • Windstorm 3.1%
  • Winter storm 1.2%

Who keeps the lights on

Utilities serving Sheridan

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Otter Tail Power Co Investor Owned 575 132 2.03 11.1 45k
Capital Electric Coop, Inc Cooperative 56 33 0.40 13.5 20k
Verendrye Electric Coop Inc Cooperative 42 42 0.65 11.2 14k
McLean Electric Coop, Inc Cooperative – – – 14.6 3.7k

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 North Dakota

Where it is darkest

Hours / yr64+

All North Dakota 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 641 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 →