Power Out Map
– 0% of Harper out 0 customers out in Oklahoma

Power outage history

Harper County Oklahoma

9.3hours

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

18th most of 75 in Oklahoma 1.4× the national median

Worst outage on record Dec 3, 2020 40% of customers out · 90% back in 26 hours
Hours without power, average customer per year 9.3h / yr State average 8.3 h · national median 6.6 h
Major outages a year 5.8 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 2.6days Jun 25, 2018, over 1% of customers out
Outage hours on storm days 37% Share falling on days with a NOAA storm report here
Worst year 2020 17 hours without power, average customer
Electricity customers 2,061 ORNL customer model · 8 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 Harper'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 17 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Harper, hours without power per customer

HarperUS median countyOklahoma average
0 5 10 15 20 ’15 ’16 ’17 12 ’18 4.5 ’19 17 ’20 7.9 ’21 5.2 ’22 13 ’23 6.1 ’24 8.7 ’25 OK 8.3 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
Dec 2, 2020 Winter storm 814 40% 2.1 d 26 h 18k
Jun 17, 2023 Thunderstorms 909 44% 15 h 12 h 9.7k
Jun 25, 2018 Thunderstorms 297 14% 2.6 d 3.0 h 9.0k
Oct 22, 2017 No storm report 804 39% 29 h 7.0 h 5.1k
May 9, 2016 No storm report 1,691 82% 3.8 h 3.2 h 4.9k
Aug 6, 2016 No storm report 941 46% 12 h 48 min 4.4k
Jun 12, 2018 Thunderstorms 297 14% 21 h 16 h 3.5k
Oct 22, 2017 No storm report 1,421 69% 3.8 h 6.5 h 3.4k
Nov 12, 2023 No storm report 167 8% 24 h 1.0 h 3.3k
Jun 28, 2020 No storm report 1,443 70% 2.5 h 2.0 h 3.0k
Jul 14, 2016 No storm report 813 39% 29 h 12 min 2.6k
Apr 13, 2018 No storm report 59 3% 2.2 d – 2.6k

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

  • No storm on record 63%
  • Thunderstorms 20%
  • Winter storm 14%
  • Windstorm 2.1%
  • Wildfire 1.0%

Who keeps the lights on

Utilities serving Harper

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Oklahoma Gas & Electric Co Investor Owned 237 145 1.71 12.5 716k
Northwestern Electric Coop Inc Cooperative – – – 16.8 9.6k
Town of Laverne OK – – – – 6.2k

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 Oklahoma

Where it is darkest

Hours / yr64+

All Oklahoma 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 2,061 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 →