Power outage history
Coos County New Hampshire
6.3hours
without power for the average customer in a typical year, 2018–2025
6th most of 10 in New Hampshire 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 Coos's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2022 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.
Coos, 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 |
|---|---|---|---|---|---|---|
| Oct 30, 2017 | Flooding | 8,259 | 34% | 4.8 d | 3.6 d | 439k |
| Dec 23, 2022 | Windstorm | 6,516 | 27% | 2.7 d | 2.4 d | 154k |
| Nov 1, 2019 | No storm report | 4,665 | 19% | 45 h | 26 h | 97k |
| Dec 17, 2022 | Winter storm | 6,289 | 26% | 17 h | 14 h | 80k |
| Jul 21, 2022 | Thunderstorms | 5,784 | 24% | 11 h | 6.0 h | 61k |
| May 5, 2018 | Thunderstorms | 3,015 | 13% | 25 h | 10 h | 45k |
| Feb 27, 2020 | Winter storm | 6,019 | 25% | 17 h | 6.2 h | 44k |
| Mar 1, 2021 | No storm report | 7,004 | 29% | 13 h | 1.5 h | 34k |
| Jan 10, 2024 | Winter storm | 3,703 | 15% | 15 h | 12 h | 31k |
| Oct 17, 2020 | No storm report | 4,631 | 19% | 12 h | 5.5 h | 27k |
| Apr 19, 2022 | Windstorm | 4,542 | 19% | 16 h | 7.8 h | 27k |
| Dec 18, 2023 | Flooding | 4,305 | 18% | 17 h | 4.2 h | 22k |
| Aug 4, 2020 | Hurricane Isaias | 2,014 | 8% | 24 h | 21 h | 18k |
| Dec 19, 2025 | No storm report | 3,849 | 16% | 12 h | 3.5 h | 17k |
| Aug 7, 2020 | No storm report | 5,295 | 22% | 3.2 h | 2.8 h | 15k |
| Jul 18, 2016 | Thunderstorms | 2,226 | 9% | 12 h | 8.8 h | 14k |
| Jun 23, 2015 | Thunderstorms | 7,202 | 30% | 4.0 h | 2.5 h | 13k |
| Jan 13, 2024 | No storm report | 1,457 | 6% | 15 h | 9.8 h | 13k |
| Dec 5, 2020 | Winter storm | 1,889 | 8% | 13 h | 5.0 h | 13k |
| Oct 12, 2024 | No storm report | 2,821 | 12% | 8.0 h | 5.0 h | 13k |
| Apr 5, 2023 | No storm report | 1,875 | 8% | 14 h | 9.8 h | 12k |
| Oct 31, 2024 | No storm report | 3,991 | 17% | 3.0 h | 8.8 h | 12k |
| Apr 20, 2015 | No storm report | 3,435 | 14% | 11 h | 1.2 h | 11k |
| Apr 4, 2024 | Winter storm | 1,541 | 6% | 11 h | 12 h | 9.9k |
| Dec 17, 2021 | No storm report | 4,214 | 18% | 3.5 h | 2.2 h | 9.5k |
| Dec 26, 2016 | No storm report | 2,480 | 10% | 7.2 h | 2.5 h | 7.7k |
| May 21, 2022 | Thunderstorms | 2,037 | 8% | 9.0 h | 3.0 h | 7.7k |
| Jan 16, 2021 | Winter storm | 1,637 | 7% | 7.5 h | 6.0 h | 7.4k |
| Mar 31, 2019 | No storm report | 1,641 | 7% | 4.5 h | 4.5 h | 7.1k |
| Nov 20, 2018 | No storm report | 1,955 | 8% | 3.5 h | 3.8 h | 6.8k |
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 Coos from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 47%
- Winter storm 20%
- Windstorm 17%
- Thunderstorms 12%
- Flooding 2.2%
- Tropical storm 2.0%
Who keeps the lights on
Utilities serving Coos
As each utility reports to the Energy Information Administration for its whole New Hampshire 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 NH | Investor Owned | 161 | 83 | 1.09 | 24.2 | 464k |
| New Hampshire Elec Coop Inc | Cooperative | 874 | 526 | 4.05 | 24.7 | 75k |
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
- Oxford, ME 32 h
- Essex, VT 25 h
- Carroll 23 h
- Grafton 8.0 h
- Coos (this county) 6.3 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 24,038 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 →