Power outage history
Allegany County Maryland
7.4hours
without power for the average customer in a typical year, 2018–2025
2nd most of 24 in Maryland close to 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 Allegany'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 15 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Allegany, 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 |
|---|---|---|---|---|---|---|
| Apr 19, 2025 | Thunderstorms | 9,889 | 30% | 3.4 d | 44 h | 179k |
| Feb 12, 2019 | Winter storm | 6,327 | 19% | 3.1 d | 39 h | 141k |
| Feb 24, 2019 | Windstorm | 3,662 | 11% | 2.7 d | 2.1 d | 90k |
| Mar 4, 2023 | Ice storm | 7,687 | 24% | 38 h | 27 h | 87k |
| Mar 2, 2018 | Windstorm | 3,951 | 12% | 44 h | 36 h | 69k |
| Dec 17, 2019 | Ice storm | 3,968 | 12% | 2.6 d | 33 h | 60k |
| Dec 23, 2022 | Winter storm | 3,458 | 11% | 43 h | 38 h | 60k |
| Oct 31, 2019 | No storm report | 3,631 | 11% | 41 h | 36 h | 51k |
| Dec 15, 2022 | Ice storm | 1,148 | 4% | 32 h | – | 25k |
| Aug 7, 2023 | Thunderstorms | 2,326 | 7% | 21 h | 20 h | 19k |
| Sep 1, 2021 | Hurricane Ida | 2,171 | 7% | 24 h | 26 h | 18k |
| Jun 18, 2025 | No storm report | 2,053 | 6% | 9.8 h | 8.5 h | 17k |
| Apr 8, 2020 | Thunderstorms | 2,003 | 6% | 15 h | 12 h | 17k |
| Mar 16, 2025 | Thunderstorms | 3,850 | 12% | 7.2 h | 3.2 h | 15k |
| Nov 27, 2019 | Windstorm | 1,789 | 6% | 17 h | 6.2 h | 14k |
| Jan 19, 2019 | Winter storm | 1,331 | 4% | 20 h | – | 14k |
| Feb 12, 2017 | No storm report | 1,321 | 4% | 13 h | – | 12k |
| May 16, 2025 | Thunderstorms | 859 | 3% | 21 h | – | 11k |
| Jan 10, 2024 | No storm report | 4,133 | 13% | 7.0 h | 2.8 h | 10k |
| Feb 6, 2025 | Ice storm | 4,744 | 15% | 6.2 h | 4.8 h | 10k |
| Mar 22, 2019 | No storm report | 2,176 | 7% | 7.0 h | 5.2 h | 9.4k |
| Jun 9, 2020 | No storm report | 2,493 | 8% | 3.8 h | 4.0 h | 9.2k |
| Apr 1, 2023 | Windstorm | 777 | 2% | 19 h | – | 9.1k |
| Jun 10, 2021 | No storm report | 3,660 | 11% | 2.5 h | 2.2 h | 9.0k |
| Jan 16, 2022 | Winter storm | 1,575 | 5% | 7.0 h | – | 8.6k |
| Feb 28, 2024 | No storm report | 2,226 | 7% | 4.2 h | 3.8 h | 8.3k |
| Jul 26, 2018 | No storm report | 2,376 | 7% | 4.8 h | 1.8 h | 8.2k |
| Jun 22, 2020 | Thunderstorms | 5,174 | 16% | 4.2 h | 2.0 h | 7.7k |
| Nov 20, 2024 | No storm report | 1,066 | 3% | 16 h | – | 7.7k |
| Dec 14, 2023 | No storm report | 7,419 | 23% | 1.5 h | 2.2 h | 7.6k |
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.
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 Allegany from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 31%
- Thunderstorms 20%
- Winter storm 19%
- Windstorm 13%
- Ice storm 13%
- Tropical storm 2.0%
- Flooding 1.5%
Who keeps the lights on
Utilities serving Allegany
As each utility reports to the Energy Information Administration for its whole Maryland territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| The Potomac Edison Company | Investor Owned | 399 | 174 | 1.30 | 15.4 | 259k |
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
- Hampshire, WV 20 h
- Morgan, WV 14 h
- Garrett 13 h
- Allegany (this county) 7.4 h
- Bedford, PA 6.3 h
- Fulton, PA 5.7 h
- Mineral, WV 5.7 h
- Somerset, PA 4.3 h
- Washington 3.5 h
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 32,504 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 →