Power outage history
Codington County South Dakota
The outage record here is too thin for a reliable yearly average. Raw events are listed below.
Worst outage on record May 12, 2022 9% of customers out · 90% back in 11 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 Codington's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
Codington, 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 |
|---|---|---|---|---|---|---|
| May 12, 2022 | Thunderstorms | 2,132 | 9% | 7.0 h | 11 h | 5.8k |
| Apr 5, 2023 | Winter storm | 985 | 4% | 6.0 h | – | 4.3k |
| Aug 28, 2020 | No storm report | 529 | 2% | 5.5 h | – | 2.9k |
| May 13, 2022 | Flooding | 254 | 1% | 5.8 h | – | 1.4k |
| Dec 9, 2020 | No storm report | 1,441 | 6% | 1.2 h | 48 min | 1.4k |
| Jun 14, 2021 | No storm report | 479 | 2% | 2.5 h | – | 1.2k |
| Dec 13, 2022 | Ice storm | 276 | 1% | 3.8 h | – | 1.0k |
| Dec 26, 2019 | No storm report | 260 | 1% | 3.8 h | – | 975 |
| Jun 9, 2020 | No storm report | 558 | 2% | 3.2 h | – | 961 |
| Feb 5, 2022 | No storm report | 537 | 2% | 2.5 h | – | 830 |
| Aug 30, 2020 | No storm report | 689 | 3% | 1.8 h | – | 760 |
| May 3, 2021 | No storm report | 612 | 3% | 1.8 h | – | 664 |
| Jul 1, 2025 | No storm report | 296 | 1% | 2.0 h | – | 592 |
| Feb 25, 2020 | No storm report | 584 | 2% | 1.0 h | – | 584 |
| Jul 31, 2020 | No storm report | 284 | 1% | 2.0 h | – | 568 |
| Jun 9, 2020 | No storm report | 323 | 1% | 1.8 h | – | 565 |
| Apr 5, 2022 | No storm report | 284 | 1% | 1.8 h | – | 497 |
| Dec 9, 2025 | Windstorm | 330 | 1% | 1.5 h | – | 495 |
| Jun 11, 2025 | No storm report | 328 | 1% | 1.2 h | – | 410 |
| Oct 9, 2021 | No storm report | 500 | 2% | 48 min | – | 375 |
| Apr 13, 2020 | No storm report | 292 | 1% | 1.2 h | – | 365 |
| Feb 25, 2020 | No storm report | 292 | 1% | 1.2 h | – | 365 |
| Apr 14, 2025 | No storm report | 328 | 1% | 30 min | – | 164 |
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 Codington from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 52%
- Thunderstorms 21%
- Winter storm 16%
- Flooding 5.3%
- Ice storm 3.7%
- Windstorm 1.8%
Who keeps the lights on
Utilities serving Codington
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 |
|---|---|---|---|---|---|---|
| Codington-Clark Elec Coop, Inc | SD | – | – | – | 9.4 | 87k |
| H-D Electric Coop Inc | SD | 60 | 60 | 1.02 | 11.1 | 67k |
| Whetstone Valley Elec Coop Inc | SD | 56 | 56 | 1.62 | 12.1 | 60k |
| NorthWestern Energy | Investor Owned | 120 | 82 | 1.14 | 13.3 | 52k |
| Watertown Municipal Utilities | Municipal | 4 | 4 | 0.12 | 9.3 | 12k |
| Otter Tail Power Co | Investor Owned | 191 | 189 | 1.73 | 11.4 | 9.1k |
| 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 24,302 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 →