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

Power outage history

Tripp County South Dakota

1.1hours

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

82% below the national median

Worst outage on record Dec 16, 2022 6% of customers out · 90% back in 6.8 hours
Hours without power, average customer per year 1.1h / yr State average 4.8 h · national median 6.6 h
Major outages a year 0.5 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 7hours Dec 16, 2022, over 1% of customers out
Outage hours on storm days 38% Share falling on days with a NOAA storm report here
Worst year 2024 1.2 hours without power, average customer
Electricity customers 4,744 ORNL customer model · 2 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 Tripp'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

2024 was the worst well-recorded year, at 1.2 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Tripp, hours without power per customer

TrippUS median countySouth Dakota average
0 2 4 6 8 ’19 ’20 ’21 ’22 ’23 1.2 ’24 1.1 ’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
Dec 16, 2022 Winter storm 275 6% 6.8 h 6.8 h 1.9k
Apr 28, 2025 No storm report 287 6% 6.2 h 14 h 1.8k
Jul 29, 2024 Thunderstorms 591 12% 5.5 h 2.0 h 1.4k
Dec 1, 2024 No storm report 288 6% 2.5 h 2.2 h 718
Nov 25, 2025 No storm report 393 8% 1.8 h 1.0 h 492
Oct 20, 2024 No storm report 288 6% 1.2 h 1.2 h 360
May 10, 2024 No storm report 103 2% 3.2 h – 332
May 8, 2025 No storm report 187 4% 1.5 h – 278
Dec 15, 2022 Winter storm 75 2% 3.0 h – 225
Aug 6, 2024 No storm report 287 6% 48 min 2.0 h 215
Sep 10, 2025 No storm report 116 2% 1.8 h – 203
Apr 24, 2024 No storm report 98 2% 2.2 h – 196

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 +2h

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

  • No storm on record 62%
  • Winter storm 22%
  • Thunderstorms 15%

Who keeps the lights on

Utilities serving Tripp

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
Winner Municipal Utility SD – – – 11.2 22k
Rosebud Electric Coop Inc Cooperative 141 78 0.77 11.9 4.9k
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

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 4,744 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 →