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

Power outage history

McHenry County North Dakota

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

Worst outage on record Jul 8, 2020 18% of customers out · 90% back in 15 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% 3hours Median across major outages, from the peak
Longest single outage 15hours Jul 8, 2020, over 1% of customers out
Outage hours on storm days 51% Share falling on days with a NOAA storm report here
Worst year –
Electricity customers 3,351 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 McHenry'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

McHenry, hours without power per customer

McHenryUS median countyNorth Dakota average
0 2 4 6 8 ’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
Jul 8, 2020 Thunderstorms 602 18% 15 h 15 h 4.5k
Oct 5, 2024 Windstorm 847 25% 9.8 h 6.0 h 4.5k
Jul 27, 2025 Thunderstorms 463 14% 13 h 6.0 h 2.8k
Aug 17, 2022 No storm report 485 14% 4.0 h 4.0 h 1.9k
Nov 2, 2023 No storm report 591 18% 3.0 h 3.0 h 1.8k
Jun 2, 2023 No storm report 564 17% 3.0 h 3.0 h 1.7k
Jul 10, 2022 Thunderstorms 844 25% 1.5 h 1.5 h 1.3k
Jun 30, 2020 No storm report 378 11% 6.8 h 6.8 h 902
Aug 2, 2025 No storm report 403 12% 2.0 h 2.0 h 806
Sep 16, 2024 No storm report 284 8% 2.8 h 2.8 h 781
Apr 23, 2020 No storm report 346 10% 2.2 h 2.2 h 778
Jul 12, 2024 Thunderstorms 307 9% 2.5 h 2.5 h 742

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 +4h

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

  • No storm on record 49%
  • Thunderstorms 35%
  • Windstorm 16%

Who keeps the lights on

Utilities serving McHenry

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
Northern States Power Co - Minnesota Investor Owned 88 57 0.55 13.5 83k
Otter Tail Power Co Investor Owned 575 132 2.03 11.1 45k
Verendrye Electric Coop Inc Cooperative 42 42 0.65 11.2 14k
North Central Elec Coop, Inc Cooperative 60 60 – 10.9 6.1k
McLean Electric Coop, Inc Cooperative – – – 14.6 3.7k
WAPA-- Western Area Power Administration Federal – – – – –

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 3,351 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 →