Power outage history
Hand County South Dakota
The outage record here is too thin for a reliable yearly average. Raw events are listed below.
Worst outage on record Jul 5, 2022 19% of customers out · 90% back in 6.8 hoursEvery day since 2015
Eleven years, one night at a time
Each cell is a day. The brighter it is, the larger the share of Hand's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
Hand, 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 |
|---|---|---|---|---|---|---|
| Jul 5, 2022 | Thunderstorms | 388 | 19% | 8.8 h | 6.8 h | 1.4k |
| Oct 25, 2024 | No storm report | 146 | 7% | 9.2 h | 9.2 h | 1.4k |
| Mar 19, 2020 | No storm report | 182 | 9% | 6.8 h | 6.8 h | 1.2k |
| Jul 14, 2021 | No storm report | 313 | 16% | 4.0 h | 3.8 h | 1.2k |
| Nov 10, 2022 | Ice storm | 339 | 17% | 3.8 h | 4.2 h | 1.1k |
| May 12, 2022 | No storm report | 338 | 17% | 2.2 h | 2.2 h | 760 |
| Sep 14, 2021 | No storm report | 276 | 14% | 2.8 h | 1.8 h | 396 |
| Jul 26, 2023 | No storm report | 145 | 7% | 2.0 h | 2.0 h | 290 |
| Sep 3, 2025 | No storm report | 66 | 3% | 1.5 h | – | 99 |
| Nov 7, 2022 | No storm report | 77 | 4% | 1.0 h | – | 77 |
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 Hand from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 68%
- Thunderstorms 18%
- Ice storm 14%
Who keeps the lights on
Utilities serving Hand
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 |
| City of Miller | SD | – | – | – | 8.9 | 12k |
| Northern Electric Coop, Inc | Cooperative | 73 | 65 | 0.74 | 11.4 | 5.8k |
| Dakota Energy Coop Inc | Cooperative | – | – | – | 16.3 | 3.2k |
| 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.
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 1,991 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 →