Power outage history
Windham County Vermont
37hours
without power for the average customer in a typical year, 2018–2025
1st most of 14 in Vermont 5.6× 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 Windham's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2023 was the worst well-recorded year, at 3.6 days for the average customer. Hatched years have a thin record and are left out of the averages.
Windham, 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 14, 2023 | Winter storm | 15,121 | 100% | 4.8 d | 3.4 d | 828k |
| Nov 26, 2018 | Winter storm | 14,231 | 94% | 4.8 d | 21 h | 558k |
| Dec 16, 2022 | Winter storm | 6,650 | 44% | 3.3 d | 2.0 d | 226k |
| Apr 4, 2018 | Windstorm | 9,032 | 60% | 2.8 d | 44 h | 216k |
| Oct 31, 2019 | Windstorm | 14,012 | 93% | 2.9 d | 31 h | 181k |
| Jan 22, 2023 | Winter storm | 9,527 | 63% | 47 h | 27 h | 156k |
| Aug 4, 2020 | Hurricane Isaias | 15,121 | 100% | 35 h | 19 h | 145k |
| Jan 16, 2021 | Winter storm | 11,839 | 78% | 32 h | 25 h | 111k |
| Feb 28, 2024 | Windstorm | 6,851 | 45% | 45 h | 33 h | 94k |
| May 18, 2017 | Thunderstorms | 8,479 | 56% | 25 h | 18 h | 87k |
| Jun 18, 2018 | Thunderstorms | 10,539 | 70% | 23 h | 10 h | 74k |
| Oct 27, 2016 | Winter storm | 6,782 | 45% | 28 h | 18 h | 72k |
| Sep 7, 2023 | Thunderstorms | 7,764 | 51% | 37 h | 8.5 h | 70k |
| Apr 4, 2024 | Winter storm | 5,306 | 35% | 34 h | 25 h | 69k |
| Oct 30, 2017 | Windstorm | 3,970 | 26% | 2.4 d | 24 h | 68k |
| Mar 7, 2022 | Windstorm | 5,296 | 35% | 27 h | 19 h | 56k |
| May 4, 2018 | Thunderstorms | 5,551 | 37% | 39 h | 12 h | 45k |
| Mar 1, 2016 | Windstorm | 4,780 | 32% | 20 h | 12 h | 43k |
| Jul 10, 2023 | Flooding | 1,992 | 13% | 28 h | 20 h | 36k |
| Oct 16, 2019 | Windstorm | 2,816 | 19% | 30 h | 19 h | 31k |
| Mar 21, 2024 | No storm report | 2,672 | 18% | 11 h | 19 h | 28k |
| Sep 30, 2020 | No storm report | 4,488 | 30% | 11 h | 7.8 h | 26k |
| Jul 12, 2015 | No storm report | 5,015 | 33% | 8.0 h | 7.2 h | 26k |
| Dec 23, 2017 | Winter storm | 6,046 | 40% | 17 h | 7.8 h | 26k |
| Feb 18, 2022 | Windstorm | 3,346 | 22% | 12 h | 8.0 h | 25k |
| Jan 25, 2023 | Windstorm | 3,774 | 25% | 23 h | 12 h | 24k |
| Nov 3, 2018 | Windstorm | 2,380 | 16% | 22 h | 19 h | 22k |
| Mar 30, 2025 | Ice storm | 1,108 | 7% | 37 h | 30 h | 21k |
| Feb 17, 2025 | Winter storm | 1,595 | 11% | 35 h | 25 h | 21k |
| Feb 7, 2020 | Winter storm | 2,460 | 16% | 14 h | 11 h | 20k |
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 Windham from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Winter storm 50%
- No storm on record 19%
- Windstorm 19%
- Thunderstorms 6.5%
- Tropical storm 4.0%
- Flooding 1.3%
- Heat 0.6%
- Ice storm 0.5%
Who keeps the lights on
Utilities serving Windham
As each utility reports to the Energy Information Administration for its whole Vermont territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Green Mountain Power Corp | Investor Owned | 265 | 190 | 1.75 | 23.3 | 228k |
| Village of Jacksonville | VT | – | – | – | – | 3.5k |
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
- Windham (this county) 37 h
- Windsor 15 h
- Sullivan, NH 13 h
- Cheshire, NH 11 h
- Bennington 7.5 h
- Franklin, MA 3.6 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 15,121 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 →