Power Out Map
– 0% of Niobrara out 0 customers out in Wyoming

Power outage history

Niobrara County Wyoming

3.8hours

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

42% below the national median

Worst outage on record Sep 24, 2019 9% of customers out · 90% back in 7.8 hours
Hours without power, average customer per year 3.8h / yr State average 2.4 h · national median 6.6 h
Major outages a year 7.0 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 7hours Sep 24, 2019, over 1% of customers out
Outage hours on storm days 14% Share falling on days with a NOAA storm report here
Worst year 2019 6.4 hours without power, average customer
Electricity customers 1,259 Estimated from population · 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 Niobrara'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

2019 was the worst well-recorded year, at 6.4 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Niobrara, hours without power per customer

NiobraraUS median countyWyoming average
0 2 4 6 8 ’17 ’18 6.4 ’19 1.3 ’20 US 6.6 WY 2.4

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 24, 2019 No storm report 118 9% 7.2 h 7.8 h 830
Aug 18, 2019 No storm report 683 54% 1.2 h 12 min 704
Sep 6, 2019 No storm report 328 26% 5.8 h 30 min 561
Sep 7, 2019 No storm report 327 26% 7.2 h 30 min 411
Mar 13, 2019 Winter storm 84 7% 5.2 h 4.5 h 384
Apr 4, 2019 No storm report 398 32% 48 min 48 min 298
Mar 22, 2019 No storm report 398 32% 48 min 48 min 298
Nov 30, 2019 Winter storm 59 5% 7.2 h – 288
May 11, 2020 No storm report 106 8% 2.5 h 2.2 h 260
Sep 27, 2019 No storm report 231 18% 1.0 h 48 min 218
Jul 24, 2019 No storm report 326 26% 30 min 30 min 163
Sep 23, 2019 No storm report 26 2% 6.2 h – 162

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

  • No storm on record 86%
  • Winter storm 11%
  • Thunderstorms 1.4%
  • Windstorm 1.0%

Who keeps the lights on

Utilities serving Niobrara

As each utility reports to the Energy Information Administration for its whole Wyoming territory, not this county alone. Outage minutes include major storm days.

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Niobrara Electric Assn, Inc WY 1,018 603 – – 10k
Town of Lusk WY – – – – 6.0k
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 Wyoming

Where it is darkest

Hours / yr64+

All Wyoming 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 1,259 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 →