Power outage history
Carroll County New Hampshire
23hours
without power for the average customer in a typical year, 2018–2025
1st most of 10 in New Hampshire 3.5× 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 Carroll's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2024 was the worst well-recorded year, at 2.7 days for the average customer. Hatched years have a thin record and are left out of the averages.
Carroll, 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 3, 2024 | Winter storm | 26,009 | 100% | 4.8 d | 3.2 d | 1.3M |
| Oct 30, 2017 | Flooding | 13,028 | 50% | 4.0 d | 3.1 d | 470k |
| Dec 16, 2022 | Winter storm | 16,569 | 64% | 2.1 d | 33 h | 367k |
| Aug 4, 2020 | Hurricane Isaias | 13,723 | 53% | 2.9 d | 44 h | 284k |
| Dec 23, 2022 | Flooding | 9,178 | 35% | 3.4 d | 2.0 d | 221k |
| Dec 5, 2020 | Winter storm | 10,295 | 40% | 2.1 d | 31 h | 191k |
| Nov 26, 2018 | Winter storm | 14,308 | 55% | 43 h | 17 h | 151k |
| Mar 7, 2025 | No storm report | 13,683 | 53% | 29 h | 12 h | 119k |
| Mar 2, 2021 | Windstorm | 6,618 | 25% | 40 h | 30 h | 88k |
| Nov 1, 2019 | No storm report | 5,527 | 21% | 38 h | 23 h | 83k |
| Dec 29, 2025 | Winter storm | 7,619 | 29% | 35 h | 9.2 h | 77k |
| Dec 18, 2023 | Flooding | 10,047 | 39% | 32 h | 23 h | 75k |
| Jul 21, 2022 | Thunderstorms | 4,937 | 19% | 29 h | 26 h | 56k |
| Dec 4, 2023 | Winter storm | 5,716 | 22% | 18 h | 9.5 h | 48k |
| Mar 10, 2024 | Winter storm | 7,202 | 28% | 17 h | 7.5 h | 39k |
| Aug 21, 2015 | No storm report | 7,962 | 31% | 11 h | 7.5 h | 37k |
| Mar 29, 2021 | No storm report | 3,569 | 14% | 29 h | 26 h | 37k |
| Oct 17, 2019 | No storm report | 4,529 | 17% | 34 h | 9.8 h | 32k |
| Oct 12, 2024 | No storm report | 3,808 | 15% | 28 h | 15 h | 32k |
| Mar 14, 2023 | Winter storm | 3,271 | 13% | 21 h | 2.0 h | 28k |
| Jan 13, 2024 | No storm report | 4,173 | 16% | 9.8 h | 3.5 h | 27k |
| Apr 4, 2018 | No storm report | 3,408 | 13% | 19 h | 4.0 h | 25k |
| May 2, 2025 | No storm report | 9,633 | 37% | 3.5 h | 2.5 h | 25k |
| Oct 31, 2025 | No storm report | 5,935 | 23% | 8.2 h | 3.5 h | 22k |
| Jan 9, 2019 | Winter storm | 4,402 | 17% | 13 h | 3.8 h | 21k |
| Dec 23, 2017 | No storm report | 3,797 | 15% | 14 h | 4.2 h | 20k |
| Feb 7, 2020 | No storm report | 2,574 | 10% | 21 h | 4.0 h | 20k |
| Jul 15, 2023 | No storm report | 3,143 | 12% | 6.5 h | 3.5 h | 18k |
| Mar 8, 2022 | No storm report | 2,176 | 8% | 16 h | 11 h | 16k |
| Feb 25, 2019 | No storm report | 5,023 | 19% | 10 h | 2.2 h | 15k |
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 Carroll from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Winter storm 55%
- No storm on record 25%
- Flooding 7.4%
- Tropical storm 7.2%
- Thunderstorms 3.0%
- Windstorm 2.2%
Who keeps the lights on
Utilities serving Carroll
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 |
| Town of Wolfeboro | NH | – | – | – | 14.6 | 36k |
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 26,009 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 →