Power outage history
Adams County Colorado
2.4hours
without power for the average customer in a typical year, 2018–2025
27th most of 39 in Colorado 63% below the national median
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 Adams's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2019 was the worst well-recorded year, at 5.7 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Adams, hours without power per customer
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 | 45,703 | 19% | 2.4 d | 38 h | 1.1M |
| Mar 23, 2016 | Winter storm | 30,136 | 12% | 35 h | 29 h | 398k |
| Apr 17, 2018 | Windstorm | 12,316 | 5% | 21 h | 26 h | 93k |
| Jun 6, 2020 | Thunderstorms | 18,345 | 8% | 12 h | 12 h | 91k |
| Apr 6, 2024 | Windstorm | 3,604 | 1% | 21 h | – | 71k |
| Nov 8, 2024 | Winter storm | 4,530 | 2% | 12 h | – | 49k |
| Dec 17, 2025 | Windstorm | 4,282 | 2% | 15 h | – | 39k |
| May 29, 2021 | No storm report | 18,856 | 8% | 2.5 h | 2.2 h | 35k |
| May 26, 2025 | No storm report | 14,662 | 6% | 5.2 h | 1.8 h | 22k |
| Sep 10, 2024 | No storm report | 6,976 | 3% | 3.5 h | 4.2 h | 22k |
| Jun 25, 2022 | No storm report | 7,790 | 3% | 4.8 h | 4.2 h | 20k |
| Jul 8, 2018 | No storm report | 10,284 | 4% | 3.0 h | 2.5 h | 20k |
| Apr 8, 2024 | No storm report | 2,913 | 1% | 6.2 h | – | 17k |
| Oct 17, 2024 | No storm report | 3,783 | 2% | 4.8 h | – | 17k |
| Apr 19, 2023 | Windstorm | 7,100 | 3% | 3.8 h | 2.8 h | 16k |
| Feb 16, 2019 | No storm report | 3,906 | 2% | 4.0 h | – | 16k |
| Mar 15, 2018 | No storm report | 7,405 | 3% | 3.8 h | 6.2 h | 16k |
| Mar 16, 2023 | No storm report | 5,760 | 2% | 3.0 h | 4.5 h | 15k |
| Dec 19, 2025 | No storm report | 3,652 | 2% | 6.2 h | – | 15k |
| May 21, 2022 | Winter storm | 3,783 | 2% | 4.0 h | – | 15k |
| Jul 19, 2022 | No storm report | 7,622 | 3% | 3.5 h | 48 min | 14k |
| Aug 17, 2018 | No storm report | 7,387 | 3% | 3.8 h | 2.8 h | 13k |
| Apr 9, 2024 | No storm report | 5,478 | 2% | 3.2 h | 4.5 h | 13k |
| Dec 15, 2025 | No storm report | 7,581 | 3% | 3.2 h | 3.0 h | 13k |
| Jul 27, 2015 | No storm report | 6,439 | 3% | 2.0 h | 1.2 h | 12k |
| Mar 17, 2022 | Winter storm | 4,541 | 2% | 3.8 h | – | 12k |
| Aug 6, 2024 | No storm report | 4,257 | 2% | 3.2 h | – | 12k |
| Jun 23, 2020 | No storm report | 2,567 | 1% | 4.8 h | – | 12k |
| May 31, 2023 | No storm report | 7,122 | 3% | 1.8 h | 48 min | 12k |
| Feb 23, 2020 | No storm report | 8,584 | 4% | 2.0 h | 3.2 h | 11k |
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.
When it happens
The outage clock
Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.
What was happening
Weather behind the outages
Each outage is matched to NOAA storm reports for Adams from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Winter storm 49%
- No storm on record 35%
- Windstorm 9.6%
- Thunderstorms 4.7%
- Flooding 0.5%
Who keeps the lights on
Utilities serving Adams
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 |
| United Power, Inc | Cooperative | 303 | 90 | 1.18 | 16.5 | 103k |
| Morgan County Rural Elec Assn | Cooperative | 86 | 86 | – | 14.5 | 5.9k |
| 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
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 243,036 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 →