Power outage history
Marshall County South Dakota
16hours
without power for the average customer in a typical year, 2018–2025
3rd most of 32 in South Dakota 2.5× the national median
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 Marshall's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2022 was the worst well-recorded year, at 46 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Marshall, hours without power per customer
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 |
|---|---|---|---|---|---|---|
| Sep 12, 2022 | No storm report | 444 | 18% | 3.0 d | 2.0 d | 31k |
| Jul 14, 2023 | No storm report | 258 | 10% | 5.1 d | 3.9 d | 31k |
| Apr 22, 2022 | No storm report | 701 | 28% | 40 h | 30 h | 24k |
| Oct 4, 2022 | No storm report | 690 | 28% | 2.4 d | 29 h | 20k |
| Sep 19, 2022 | No storm report | 434 | 17% | 40 h | 40 h | 17k |
| Aug 21, 2025 | No storm report | 110 | 4% | 4.9 d | – | 13k |
| Oct 8, 2025 | No storm report | 429 | 17% | 30 h | 30 h | 12k |
| Sep 27, 2022 | No storm report | 434 | 17% | 24 h | 24 h | 6.5k |
| Jul 12, 2019 | No storm report | 85 | 3% | 2.9 d | – | 5.1k |
| Sep 9, 2020 | No storm report | 676 | 27% | 2.0 d | 2.4 d | 5.1k |
| Nov 10, 2022 | Ice storm | 279 | 11% | 37 h | 24 h | 5.1k |
| Jul 31, 2024 | Thunderstorms | 742 | 30% | 11 h | 5.2 h | 4.2k |
| Jun 14, 2024 | No storm report | 704 | 28% | 5.0 h | 5.0 h | 3.5k |
| Dec 29, 2019 | Winter storm | 203 | 8% | 21 h | 4.0 h | 3.5k |
| Aug 25, 2020 | No storm report | 833 | 33% | 5.0 h | 11 h | 3.5k |
| Apr 19, 2023 | No storm report | 839 | 33% | 3.2 h | 2.0 h | 2.6k |
| Jan 23, 2024 | No storm report | 57 | 2% | 42 h | – | 2.3k |
| Aug 30, 2023 | No storm report | 88 | 4% | 26 h | – | 2.3k |
| Aug 21, 2020 | Tornadoes | 834 | 33% | 3.0 h | 2.5 h | 2.1k |
| Apr 7, 2024 | Windstorm | 827 | 33% | 2.5 h | 2.2 h | 2.0k |
| Mar 31, 2023 | Winter storm | 328 | 13% | 6.0 h | 5.2 h | 2.0k |
| Jan 29, 2020 | No storm report | 99 | 4% | 19 h | – | 1.8k |
| Aug 11, 2025 | No storm report | 126 | 5% | 22 h | 21 h | 1.8k |
| Dec 13, 2023 | No storm report | 67 | 3% | 26 h | – | 1.7k |
| Sep 30, 2022 | No storm report | 434 | 17% | 4.0 h | 4.0 h | 1.7k |
| Sep 9, 2022 | No storm report | 555 | 22% | 3.0 h | 3.0 h | 1.7k |
| Apr 6, 2024 | Windstorm | 827 | 33% | 1.8 h | 5.0 h | 1.4k |
| Dec 27, 2019 | No storm report | 685 | 27% | 2.0 h | 48 min | 1.4k |
| Nov 25, 2025 | Winter storm | 310 | 12% | 6.5 h | 6.5 h | 1.4k |
| Feb 1, 2024 | No storm report | 59 | 2% | 23 h | – | 1.3k |
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.
When it happens
The outage clock
Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.
What was happening
Weather behind the outages
Each outage is matched to NOAA storm reports for Marshall from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 89%
- Winter storm 3.4%
- Thunderstorms 2.5%
- Ice storm 2.1%
- Windstorm 1.5%
- Tornadoes 0.9%
- Flooding 0.5%
Who keeps the lights on
Utilities serving Marshall
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 |
|---|---|---|---|---|---|---|
| Lake Region Electric Assn, Inc | SD | – | – | – | 12.0 | 62k |
| NorthWestern Energy | Investor Owned | 120 | 82 | 1.14 | 13.3 | 52k |
| Traverse Electric Coop, Inc | MN | – | – | – | 11.2 | 22k |
| Otter Tail Power Co | Investor Owned | 191 | 189 | 1.73 | 11.4 | 9.1k |
| Northern Electric Coop, Inc | Cooperative | 73 | 65 | 0.74 | 11.4 | 5.8k |
| Town of Langford | SD | – | – | – | – | 1.9k |
| 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
- Marshall (this county) 16 h
- Sargent, ND 12 h
- Day 8.5 h
- Roberts 5.1 h
- Brown 2.3 h
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 2,509 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 →