– 0% of Litchfield out 0 customers out in Connecticut

Power outage history

Litchfield County Connecticut

13hours

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

1st most of 8 in Connecticut 1.9× the national median

Worst outage on record Hurricane Isaias · Aug 5, 2020 65% of customers out · 90% back in 6.0 days

Hours without power, average customer per year 13h / yr State average 7.3 h · national median 6.6 h

Major outages a year 0.9 Peaks over 10% of customers or 50,000 customers

Typical time to restore 90% 13hours Median across major outages, from the peak

Longest single outage 7.3days Hurricane Isaias, over 1% of customers out

Outage hours on storm days 98% Share falling on days with a NOAA storm report here

Worst year 2020 2.8 days without power, average customer

Electricity customers 102,535 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 Litchfield'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

2020 was the worst well-recorded year, at 2.8 days for the average customer. Hatched years have a thin record and are left out of the averages.

Litchfield, hours without power per customer

LitchfieldUS median countyConnecticut average

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
Aug 4, 2020	Hurricane Isaias	66,462	65%	7.3 d	6.0 d	6.3M
Dec 23, 2022	Windstorm	19,088	19%	2.0 d	39 h	415k
Jun 26, 2024	Thunderstorms	14,008	14%	40 h	25 h	277k
May 15, 2018	Thunderstorms	17,434	17%	16 h	13 h	181k
Mar 2, 2018	Winter storm	6,884	7%	47 h	47 h	142k
Mar 14, 2023	Winter storm	12,643	12%	31 h	11 h	142k
Dec 25, 2020	Windstorm	8,850	9%	32 h	29 h	132k
Oct 31, 2019	Windstorm	9,230	9%	34 h	29 h	131k
Feb 24, 2016	Thunderstorms	8,717	9%	30 h	24 h	112k
Oct 30, 2017	Windstorm	4,456	4%	42 h	–	108k
Feb 16, 2025	Winter storm	9,108	9%	31 h	22 h	102k
Oct 16, 2019	Windstorm	5,379	5%	36 h	33 h	102k
Dec 18, 2023	Flooding	8,819	9%	30 h	28 h	86k
Aug 27, 2020	Thunderstorms	7,888	8%	26 h	24 h	85k
Apr 13, 2020	Windstorm	7,961	8%	21 h	24 h	77k
Jul 6, 2021	Thunderstorms	5,107	5%	33 h	25 h	72k
Nov 15, 2020	Thunderstorms	10,564	10%	22 h	10 h	70k
May 3, 2025	Thunderstorms	6,102	6%	14 h	17 h	60k
Mar 7, 2018	Winter storm	3,388	3%	31 h	–	58k
Mar 12, 2022	Winter storm	6,226	6%	13 h	11 h	40k
Mar 7, 2025	Windstorm	5,072	5%	13 h	15 h	33k
Apr 21, 2021	Thunderstorms	2,973	3%	8.0 h	–	17k
Mar 7, 2022	Windstorm	4,450	4%	6.0 h	–	16k
Mar 24, 2025	No storm report	16,582	16%	4.0 h	4.0 h	15k
Feb 25, 2019	Windstorm	4,233	4%	5.0 h	–	15k
Mar 2, 2021	Windstorm	2,155	2%	9.5 h	–	15k
Aug 29, 2020	No storm report	3,700	4%	5.2 h	–	13k
Jan 14, 2024	No storm report	3,278	3%	6.2 h	–	12k
Sep 1, 2021	Hurricane Ida	1,759	2%	7.5 h	–	11k
May 18, 2018	No storm report	1,264	1%	9.0 h	–	10k

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

Tropical storm 71%
Windstorm 11%
Thunderstorms 8.9%
Winter storm 5.6%
No storm on record 2.1%
Flooding 1.0%

Who keeps the lights on

Utilities serving Litchfield

As each utility reports to the Energy Information Administration for its whole Connecticut territory, not this county alone. Outage minutes include major storm days.

Utility	Type	Outage min / yr	Excl. major storms	Outages / yr	Residential ¢/kWh	Customers
Connecticut Light & Power Co	Investor Owned	217	85	1.00	28.9	1.2M

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

Litchfield (this county) 13 h
Dutchess, NY 12 h
Fairfield 11 h
Hampden, MA 5.8 h
New Haven 5.7 h
Hartford 3.9 h
Berkshire, MA 3.3 h

Across Connecticut

Where it is darkest

Hours / yr64+

All Connecticut 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 102,535 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 →