Power Out Map
– 0% of Armstrong out 0 customers out in Texas

Power outage history

Armstrong County Texas

17hours

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

57th most of 240 in Texas 2.5× the national median

Worst outage on record Oct 28, 2020 100% of customers out · 90% back in 2.4 days
Hours without power, average customer per year 17h / yr State average 9.0 h · national median 6.6 h
Major outages a year 7.3 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 3.8days Oct 28, 2020, over 1% of customers out
Outage hours on storm days 65% Share falling on days with a NOAA storm report here
Worst year 2020 2.5 days without power, average customer
Electricity customers 943 Estimated from population · 7 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 Armstrong'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

2020 was the worst well-recorded year, at 2.5 days for the average customer. Hatched years have a thin record and are left out of the averages.

Armstrong, hours without power per customer

ArmstrongUS median countyTexas average
0 20 40 60 80 ’15 ’16 ’17 ’18 12 ’19 60 ’20 5.0 ’21 13 ’22 3.2 ’23 2.3 ’24 21 ’25 TX 9.0 US 6.6

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
Oct 28, 2020 Winter storm 943 100% 3.8 d 2.4 d 47k
Jul 12, 2025 No storm report 917 97% 8.0 h 8.0 h 7.3k
Mar 13, 2019 Windstorm 475 50% 28 h 28 h 5.6k
May 10, 2022 Thunderstorms 903 96% 6.0 h 4.5 h 4.1k
Jul 13, 2025 No storm report 917 97% 3.2 h 3.8 h 3.0k
Aug 7, 2025 No storm report 920 98% 6.2 h 6.2 h 2.9k
Mar 22, 2022 Winter storm 179 19% 17 h 14 h 2.9k
Nov 28, 2020 No storm report 873 93% 3.8 h 4.0 h 2.6k
Jun 14, 2025 No storm report 916 97% 2.8 h 2.8 h 2.5k
Jan 15, 2022 Windstorm 379 40% 7.5 h – 2.0k
Apr 4, 2023 Windstorm 907 96% 2.0 h 2.0 h 1.8k
Jul 14, 2020 No storm report 872 92% 2.0 h 2.0 h 1.7k

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 +4h 90% by +6h

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

  • Winter storm 46%
  • No storm on record 36%
  • Windstorm 12%
  • Thunderstorms 6.6%

Who keeps the lights on

Utilities serving Armstrong

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Southwestern Public Service Co Investor Owned 441 151 1.71 13.9 224k
Swisher Electric Coop, Inc TX 426 – 4.02 11.7 24k
Greenbelt Electric Coop, Inc Cooperative – – – 17.9 3.9k

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 Texas

Where it is darkest

Hours / yr64+

All Texas 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 943 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 →