Power Out Map
– 0% of Rock out 0 customers out in Minnesota

Power outage history

Rock County Minnesota

3.1hours

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

24th most of 54 in Minnesota 53% below the national median

Worst outage on record Apr 11, 2019 14% of customers out · 90% back in 3.2 days
Hours without power, average customer per year 3.1h / yr State average 2.9 h · national median 6.6 h
Major outages a year 2.3 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 5.1days Apr 10, 2019, over 1% of customers out
Outage hours on storm days 69% Share falling on days with a NOAA storm report here
Worst year 2019 8.5 hours without power, average customer
Electricity customers 4,958 ORNL customer model · 8 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 Rock'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

2019 was the worst well-recorded year, at 8.5 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Rock, hours without power per customer

RockUS median countyMinnesota average
0 5 10 15 20 25 ’15 19 ’16 5.8 ’17 5.5 ’18 8.5 ’19 1.3 ’20 2.3 ’21 4.2 ’22 0.7 ’23 0.4 ’24 1.6 ’25 US 6.6 MN 2.9

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
Apr 10, 2019 Ice storm 700 14% 5.1 d 3.2 d 27k
Jun 15, 2016 No storm report 3,677 74% 14 h 5.2 h 16k
Aug 18, 2016 No storm report 2,197 44% 19 h 12 h 14k
Jul 6, 2016 No storm report 3,924 79% 9.8 h 3.5 h 14k
Apr 13, 2018 Thunderstorms 1,368 28% 2.5 d 11 h 12k
May 12, 2022 Thunderstorms 1,050 21% 29 h 28 h 9.0k
May 18, 2017 No storm report 900 18% 30 h 27 h 9.0k
Jul 21, 2016 Heat 1,748 35% 5.5 h 3.8 h 3.8k
Jul 28, 2018 No storm report 286 6% 10 h 10 h 2.9k
Sep 12, 2019 Flooding 82 2% 30 h – 2.5k
Feb 24, 2017 Winter storm 1,178 24% 3.8 h 2.0 h 2.4k
May 30, 2022 Thunderstorms 699 14% 8.0 h 3.0 h 2.4k

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

  • Ice storm 33%
  • Thunderstorms 31%
  • No storm on record 31%
  • Flooding 3.5%
  • Winter storm 1.0%
  • Heat 0.7%

Who keeps the lights on

Utilities serving Rock

As each utility reports to the Energy Information Administration for its whole Minnesota 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 226 115 1.38 17.1 1.2M
Nobles Cooperative Electric MN 3,714 223 2.57 11.3 96k
City of Luverne MN 6 6 0.16 10.3 24k
Sioux Valley SW Elec Coop Cooperative 95 95 1.90 13.5 3.4k

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 Minnesota

Where it is darkest

Hours / yr64+

All Minnesota 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 4,958 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 →