Power Out Map
– 0% of Davison out 0 customers out in South Dakota

Power outage history

Davison County South Dakota

2.5hours

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

28th most of 32 in South Dakota 63% below the national median

Worst outage on record Jun 9, 2020 34% of customers out · 90% back in 4.8 hours
Hours without power, average customer per year 2.5h / yr State average 4.8 h · national median 6.6 h
Major outages a year 1.8 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 34hours Jun 9, 2020, over 1% of customers out
Outage hours on storm days 80% Share falling on days with a NOAA storm report here
Worst year 2022 4.1 hours without power, average customer
Electricity customers 11,593 ORNL customer model · 6 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 Davison'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

2022 was the worst well-recorded year, at 4.1 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Davison, hours without power per customer

DavisonUS median countySouth Dakota average
0 2 4 6 8 ’19 3.7 ’20 1.3 ’21 4.1 ’22 2.2 ’23 1.9 ’24 1.5 ’25 US 6.6 SD 4.8

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 9, 2020 Thunderstorms 3,951 34% 34 h 4.8 h 26k
May 12, 2022 Thunderstorms 6,327 55% 5.8 h 10 h 25k
Jul 26, 2022 Flooding 6,153 53% 2.2 h 8.8 h 12k
Jul 25, 2023 Thunderstorms 3,518 30% 5.8 h 2.2 h 11k
Jul 5, 2022 Thunderstorms 2,055 18% 3.5 h 1.0 h 4.8k
Sep 27, 2024 No storm report 1,317 11% 3.2 h 3.2 h 4.3k
Apr 22, 2023 Flooding 1,114 10% 3.5 h 3.5 h 3.8k
Jul 29, 2025 Thunderstorms 1,458 13% 2.2 h 1.2 h 3.3k
Mar 15, 2021 Winter storm 2,581 22% 1.5 h 30 min 3.2k
Dec 9, 2025 Windstorm 949 8% 3.2 h 2.0 h 2.6k
Aug 6, 2025 No storm report 493 4% 6.2 h – 2.3k
Jun 25, 2020 Thunderstorms 1,945 17% 1.2 h 1.0 h 2.1k

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

  • Thunderstorms 51%
  • No storm on record 20%
  • Flooding 18%
  • Winter storm 6.0%
  • Windstorm 3.4%
  • Heat 1.8%

Who keeps the lights on

Utilities serving Davison

As each utility reports to the Energy Information Administration for its whole South 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
NorthWestern Energy Investor Owned 120 82 1.14 13.3 52k
Douglas Electric Coop, Inc SD – – – 12.4 19k
Central Electric Coop, Inc Cooperative – – – 14.7 6.5k
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 South Dakota

Where it is darkest

Hours / yr64+

All South 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 11,593 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 →