Power Out Map
– 0% of Belknap out 0 customers out in New Hampshire

Power outage history

Belknap County New Hampshire

14hours

without power for the average customer in a typical year, 2018–2025

2nd most of 10 in New Hampshire 2.2× the national median

Worst outage on record Oct 30, 2017 63% of customers out · 90% back in 3.1 days
Hours without power, average customer per year 14h / yr State average 6.9 h · national median 6.6 h
Major outages a year 4.4 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 8hours Median across major outages, from the peak
Longest single outage 14.3days Dec 23, 2022, over 1% of customers out
Outage hours on storm days 74% Share falling on days with a NOAA storm report here
Worst year 2024 35 hours without power, average customer
Electricity customers 32,434 ORNL customer model · 8 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 Belknap'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

2024 was the worst well-recorded year, at 35 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Belknap, hours without power per customer

BelknapUS median countyNew Hampshire average
0 10 20 30 40 1.8 ’15 2.6 ’16 35 ’17 5.3 ’18 6.3 ’19 14 ’20 8.2 ’21 24 ’22 12 ’23 35 ’24 10 ’25 NH 6.9 US 6.6

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 29, 2017 Windstorm 20,394 63% 4.5 d 3.1 d 1.0M
Apr 4, 2024 Winter storm 20,092 62% 4.6 d 2.6 d 746k
Dec 23, 2022 Flooding 19,985 62% 14.3 d 41 h 631k
Dec 5, 2020 Winter storm 9,150 28% 2.2 d 34 h 197k
Aug 4, 2020 Hurricane Isaias 9,254 29% 2.1 d 18 h 124k
Mar 23, 2024 Winter storm 5,251 16% 40 h 24 h 109k
Dec 16, 2022 Winter storm 6,923 21% 23 h 12 h 77k
Mar 14, 2023 Winter storm 4,877 15% 27 h 18 h 62k
Mar 14, 2017 Winter storm 6,143 19% 24 h 16 h 57k
Oct 17, 2019 No storm report 6,569 20% 39 h 10 h 50k
Mar 1, 2021 No storm report 4,148 13% 28 h 9.5 h 40k
Nov 26, 2018 No storm report 3,648 11% 31 h 8.0 h 37k

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 +10h 90% by +18h

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

  • Winter storm 43%
  • No storm on record 26%
  • Flooding 22%
  • Tropical storm 4.9%
  • Thunderstorms 4.3%

Who keeps the lights on

Utilities serving Belknap

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
New Hampton Village Precinct NH – – – – 923

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 New Hampshire

Where it is darkest

Hours / yr64+

All New Hampshire 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 32,434 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 →