Power Out Map
– 0% of Lewis out 0 customers out in New York

Power outage history

Lewis County New York

9.4hours

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

21st most of 62 in New York 1.4× the national median

Worst outage on record Dec 12, 2021 55% of customers out · 90% back in 31 hours
Hours without power, average customer per year 9.4h / yr State average 4.3 h · national median 6.6 h
Major outages a year 4.1 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 2hours Median across major outages, from the peak
Longest single outage 2.2days Jul 16, 2024, over 1% of customers out
Outage hours on storm days 75% Share falling on days with a NOAA storm report here
Worst year 2024 16 hours without power, average customer
Electricity customers 12,631 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 Lewis'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 16 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Lewis, hours without power per customer

LewisUS median countyNew York average
0 5 10 15 20 4.8 ’15 4.3 ’16 6.2 ’17 14 ’18 8.0 ’19 4.5 ’20 15 ’21 7.7 ’22 4.4 ’23 16 ’24 4.8 ’25 US 6.6 NY 4.3

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
Dec 11, 2021 Windstorm 6,974 55% 2.1 d 31 h 147k
Jan 9, 2024 Windstorm 3,182 25% 44 h 23 h 65k
May 4, 2018 Thunderstorms 4,541 36% 2.0 d 24 h 58k
Apr 18, 2022 Winter storm 3,307 26% 46 h 23 h 54k
Apr 4, 2018 Windstorm 3,694 29% 37 h 26 h 49k
Oct 31, 2019 Windstorm 2,316 18% 43 h 42 h 41k
Feb 28, 2024 Windstorm 2,767 22% 28 h 25 h 39k
Nov 30, 2024 Winter storm 1,019 8% 33 h 22 h 18k
May 21, 2024 Thunderstorms 1,418 11% 10 h 8.5 h 14k
Apr 16, 2018 Winter storm 934 7% 35 h 29 h 13k
Feb 25, 2019 Winter storm 2,095 17% 20 h 4.5 h 12k
Aug 7, 2023 Tornadoes 6,396 51% 5.2 h 48 min 11k

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 +8h 90% by +24h

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

  • Windstorm 44%
  • No storm on record 25%
  • Winter storm 15%
  • Thunderstorms 14%
  • Tornadoes 1.4%
  • Flooding 0.9%

Who keeps the lights on

Utilities serving Lewis

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Niagara Mohawk Power Corp. Investor Owned 242 140 1.39 19.9 1.5M
New York State Elec & Gas Corp Investor Owned 302 146 1.85 22.6 794k
Village of Boonville NY – – – – 50k

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 York

Where it is darkest

Hours / yr64+

All New York 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 12,631 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 →