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

Power outage history

Custer County Colorado

The outage record here is too thin for a reliable yearly average. Raw events are listed below.

Worst outage on record Dec 4, 2025 53% of customers out · 90% back in 7.8 hours
Hours without power, average customer per year –h / yr State average 3.0 h · national median 6.6 h
Major outages a year – Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 3hours Median across major outages, from the peak
Longest single outage 18hours May 10, 2024, over 1% of customers out
Outage hours on storm days 56% Share falling on days with a NOAA storm report here
Worst year –
Electricity customers 2,930 ORNL customer model · 0 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 Custer'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

Custer, hours without power per customer

CusterUS median countyColorado average
0 2 4 6 8 10 ’15 ’16 ’17 ’18 ’19 ’20 ’21 ’22 ’23 ’24 ’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
Dec 4, 2025 Winter storm 1,559 53% 7.0 h 7.8 h 11k
Nov 27, 2015 Winter storm 1,444 49% 5.0 h 5.0 h 7.2k
Apr 19, 2025 Winter storm 1,755 60% 3.8 h 4.8 h 6.6k
Feb 15, 2017 No storm report 1,219 42% 4.0 h 4.0 h 4.9k
Oct 3, 2016 No storm report 1,391 47% 2.8 h 2.8 h 3.8k
Jul 11, 2022 No storm report 893 30% 4.2 h 4.0 h 3.6k
May 10, 2024 Winter storm 447 15% 18 h 14 h 3.6k
Aug 26, 2025 No storm report 1,767 60% 2.0 h 1.8 h 3.5k
Sep 9, 2018 No storm report 1,732 59% 1.8 h 1.8 h 3.0k
Nov 29, 2015 No storm report 1,444 49% 1.8 h 1.8 h 2.5k
Jul 16, 2016 Wildfire 770 26% 3.5 h 3.5 h 2.4k
Apr 4, 2017 Winter storm 248 8% 10 h 10 h 2.4k

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

  • Winter storm 54%
  • No storm on record 44%
  • Flooding 1.3%

Who keeps the lights on

Utilities serving Custer

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
Black Hills Colorado Electric, LLC Investor Owned 95 95 0.90 18.7 98k
Sangre De Cristo Elec Assn Inc CO 198 198 1.61 17.5 84k
San Isabel Electric Assn, Inc Cooperative 87 87 0.79 18.9 23k
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 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 2,930 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 →