Power Out Map
– 0% of Arapahoe out 0 customers out in Colorado

Power outage history

Arapahoe County Colorado

2.2hours

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

29th most of 39 in Colorado 67% below the national median

Worst outage on record Mar 13, 2019 6% of customers out · 90% back in 46 hours
Hours without power, average customer per year 2.2h / yr State average 3.0 h · national median 6.6 h
Major outages a year 0.0 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% – Median across major outages, from the peak
Longest single outage 2.1days Mar 13, 2019, over 1% of customers out
Outage hours on storm days 72% Share falling on days with a NOAA storm report here
Worst year 2024 3.5 hours without power, average customer
Electricity customers 323,113 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 Arapahoe'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 3.5 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Arapahoe, hours without power per customer

ArapahoeUS median countyColorado average
0 2 4 6 8 1.3 ’15 1.2 ’16 1.2 ’17 1.6 ’18 3.2 ’19 1.6 ’20 1.5 ’21 2.9 ’22 1.9 ’23 3.5 ’24 1.5 ’25 US 6.6 CO 3.0

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
Mar 13, 2019 Winter storm 19,100 6% 2.1 d 46 h 516k
May 21, 2022 Winter storm 19,343 6% 41 h 31 h 361k
Apr 6, 2024 Windstorm 13,308 4% 21 h 23 h 211k
Mar 23, 2016 Winter storm 11,407 4% 15 h 22 h 91k
Mar 14, 2024 Winter storm 8,952 3% 19 h 30 h 87k
Jun 6, 2020 Thunderstorms 9,314 3% 12 h 24 h 75k
Nov 9, 2024 Winter storm 5,168 2% 14 h 19 h 60k
Oct 9, 2017 No storm report 10,327 3% 7.8 h 18 h 50k
Apr 7, 2024 Windstorm 4,175 1% 13 h – 41k
Jul 9, 2022 No storm report 6,132 2% 6.8 h 6.5 h 41k
May 15, 2023 No storm report 9,488 3% 5.2 h 4.5 h 38k
May 5, 2023 No storm report 4,587 1% 6.0 h – 27k

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 +8h 90% by +32h

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

  • Winter storm 52%
  • No storm on record 28%
  • Windstorm 14%
  • Thunderstorms 5.6%
  • Wildfire 0.5%

Who keeps the lights on

Utilities serving Arapahoe

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Public Service Co of Colorado Investor Owned 360 149 1.58 15.9 1.4M
CORE Electric Cooperative Cooperative 381 52 0.97 15.6 169k
Mountain View Elec Assn, Inc Cooperative 130 30 0.84 15.7 61k
Morgan County Rural Elec Assn Cooperative 86 86 – 14.5 5.9k

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 Colorado

Where it is darkest

Hours / yr64+

All Colorado 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 323,113 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 →