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

Power outage history

Cavalier County North Dakota

4.0hours

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

39% below the national median

Worst outage on record Jul 4, 2025 22% of customers out · 90% back in 9.2 hours
Hours without power, average customer per year 4.0h / yr State average 2.1 h · national median 6.6 h
Major outages a year 18.0 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 2hours Median across major outages, from the peak
Longest single outage 12hours Jul 4, 2025, over 1% of customers out
Outage hours on storm days 7% Share falling on days with a NOAA storm report here
Worst year 2025 4.0 hours without power, average customer
Electricity customers 1,864 EAGLE-I 2024 count · 1 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 Cavalier'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 4.0 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Cavalier, hours without power per customer

CavalierUS median countyNorth Dakota average
0 2 4 6 8 ’20 ’21 ’22 ’23 ’24 4.0 ’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
Jul 4, 2025 No storm report 413 22% 12 h 9.2 h 2.2k
Mar 25, 2024 No storm report 832 45% 2.5 h 2.2 h 1.9k
Jun 8, 2025 No storm report 1,290 69% 1.5 h 1.2 h 1.8k
Feb 3, 2021 No storm report 1,864 100% 3.2 h 30 min 1.1k
Oct 5, 2024 Windstorm 187 10% 4.5 h 4.5 h 842
Jun 30, 2020 No storm report 130 7% 6.2 h 6.2 h 780
Aug 8, 2025 No storm report 171 9% 4.5 h 4.5 h 770
Jan 10, 2021 No storm report 219 12% 6.8 h 6.8 h 676
Apr 9, 2024 No storm report 116 6% 4.0 h 4.0 h 464
Jun 25, 2024 No storm report 613 33% 48 min – 455
Jan 7, 2023 No storm report 247 13% 2.0 h 1.5 h 452
Jul 9, 2025 No storm report 170 9% 2.5 h 2.5 h 425

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

  • No storm on record 93%
  • Windstorm 4.2%
  • Winter storm 1.4%
  • Thunderstorms 1.2%

Who keeps the lights on

Utilities serving Cavalier

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
Nodak Electric Coop Inc Cooperative 321 104 5.40 12.7 21k

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 1,864 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 →