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

Power outage history

Grady County Oklahoma

9.4hours

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

17th most of 75 in Oklahoma 1.4× the national median

Worst outage on record Oct 28, 2020 72% of customers out · 90% back in 3.2 days
Hours without power, average customer per year 9.4h / yr State average 8.3 h · national median 6.6 h
Major outages a year 4.9 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 9.0days Nov 27, 2015, over 1% of customers out
Outage hours on storm days 78% Share falling on days with a NOAA storm report here
Worst year 2020 43 hours without power, average customer
Electricity customers 24,938 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 Grady'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 43 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Grady, hours without power per customer

GradyUS median countyOklahoma average
0 10 20 30 40 50 40 ’15 6.2 ’16 1.6 ’17 4.4 ’18 4.7 ’19 43 ’20 5.2 ’21 5.7 ’22 5.1 ’23 4.7 ’24 2.9 ’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
Oct 26, 2020 Ice storm 17,833 72% 7.3 d 3.2 d 953k
Dec 27, 2015 Ice storm 18,145 73% 3.4 d 2.6 d 682k
Nov 27, 2015 Ice storm 16,091 65% 9.0 d 12 h 226k
Dec 31, 2015 No storm report 1,945 8% 3.2 d 3.7 d 90k
Oct 10, 2021 Thunderstorms 10,204 41% 16 h 7.8 h 32k
Feb 2, 2022 No storm report 3,227 13% 9.2 h 2.0 h 21k
Apr 19, 2023 Thunderstorms 3,584 14% 13 h 7.2 h 18k
Jun 12, 2021 Thunderstorms 4,990 20% 11 h 4.0 h 17k
Aug 11, 2023 Heat 1,291 5% 16 h 16 h 15k
Aug 9, 2022 Thunderstorms 2,604 10% 14 h 1.8 h 14k
Jul 14, 2015 No storm report 3,078 12% 4.8 h 4.8 h 14k
Sep 1, 2020 No storm report 4,499 18% 5.8 h 3.0 h 13k

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 +10h

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

  • Ice storm 59%
  • No storm on record 22%
  • Thunderstorms 14%
  • Heat 1.8%
  • Windstorm 1.0%
  • Winter storm 0.6%
  • Flooding 0.5%

Who keeps the lights on

Utilities serving Grady

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
Public Service Co of Oklahoma Investor Owned 200 98 1.48 14.2 506k
Oklahoma Electric Coop Inc Cooperative 70 56 1.29 12.9 60k
CKenergy Electric Cooperative Cooperative 498 498 4.68 13.8 23k
City of Marlow OK 933 – 3.40 – 23k
Cotton Electric Coop, Inc Cooperative 549 238 4.05 12.7 20k
Rural Electric Coop, Inc Cooperative 698 212 4.49 11.9 9.2k

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 24,938 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 →