Power outage history
Herkimer County New York
11hours
without power for the average customer in a typical year, 2018–2025
14th most of 62 in New York 1.7× 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 Herkimer's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2022 was the worst well-recorded year, at 21 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Herkimer, 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 18, 2022 | Winter storm | 15,496 | 56% | 2.9 d | 42 h | 428k |
| Jun 22, 2025 | Thunderstorms | 4,932 | 18% | 38 h | 31 h | 136k |
| Oct 31, 2019 | Flooding | 2,883 | 10% | 3.0 d | 2.3 d | 111k |
| Aug 9, 2024 | Hurricane Debby | 4,703 | 17% | 47 h | 32 h | 72k |
| Jul 16, 2024 | Thunderstorms | 3,835 | 14% | 2.2 d | 2.1 d | 72k |
| May 15, 2020 | Thunderstorms | 5,023 | 18% | 26 h | 21 h | 69k |
| Apr 3, 2024 | Winter storm | 4,070 | 15% | 31 h | 16 h | 67k |
| Jan 10, 2016 | Windstorm | 4,156 | 15% | 25 h | 4.0 h | 66k |
| Feb 28, 2024 | Windstorm | 4,806 | 17% | 43 h | 21 h | 63k |
| Apr 29, 2025 | Thunderstorms | 3,817 | 14% | 27 h | 25 h | 56k |
| Mar 2, 2018 | Winter storm | 4,965 | 18% | 36 h | 25 h | 51k |
| Aug 13, 2016 | Thunderstorms | 7,716 | 28% | 29 h | 6.5 h | 45k |
| Apr 13, 2020 | Windstorm | 5,080 | 18% | 14 h | 10 h | 45k |
| Jan 10, 2017 | Windstorm | 2,605 | 9% | 42 h | 35 h | 41k |
| Oct 7, 2020 | Thunderstorms | 5,637 | 20% | 24 h | 19 h | 36k |
| Apr 5, 2024 | No storm report | 3,942 | 14% | 9.5 h | 8.0 h | 36k |
| Apr 6, 2018 | No storm report | 3,722 | 13% | 8.8 h | 7.2 h | 33k |
| Apr 29, 2020 | No storm report | 3,881 | 14% | 8.5 h | 11 h | 32k |
| Jan 24, 2017 | Winter storm | 3,906 | 14% | 19 h | 15 h | 32k |
| Jul 20, 2021 | Thunderstorms | 5,445 | 20% | 15 h | 4.2 h | 30k |
| Jun 17, 2015 | No storm report | 3,641 | 13% | 9.2 h | 2.5 h | 30k |
| May 4, 2018 | Thunderstorms | 4,213 | 15% | 8.8 h | 4.2 h | 30k |
| Jan 5, 2020 | No storm report | 3,734 | 13% | 11 h | 11 h | 29k |
| Jan 26, 2016 | No storm report | 3,657 | 13% | 7.8 h | 7.5 h | 28k |
| Apr 4, 2018 | Windstorm | 3,851 | 14% | 24 h | 18 h | 27k |
| Jan 9, 2024 | Winter storm | 3,873 | 14% | 14 h | 6.2 h | 26k |
| Apr 3, 2019 | Windstorm | 3,820 | 14% | 6.8 h | 2.5 h | 25k |
| Dec 9, 2015 | No storm report | 3,630 | 13% | 6.8 h | 3.8 h | 24k |
| Aug 8, 2022 | Heat | 3,917 | 14% | 6.0 h | 3.0 h | 23k |
| Dec 11, 2021 | Windstorm | 5,907 | 21% | 20 h | 7.5 h | 23k |
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 Herkimer from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Winter storm 30%
- No storm on record 26%
- Thunderstorms 23%
- Windstorm 9.6%
- Flooding 5.2%
- Tropical storm 3.3%
- Heat 1.8%
- Ice storm 0.9%
Who keeps the lights on
Utilities serving Herkimer
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 |
| Otsego Electric Coop, Inc | NY | – | – | – | – | 44k |
| Village of Ilion | NY | – | – | – | – | 42k |
| Village of Frankfort | NY | – | – | – | – | 19k |
| Mohawk Municipal Comm | NY | – | – | – | – | 15k |
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
- Hamilton 99 h
- Herkimer (this county) 11 h
- Fulton 9.8 h
- Lewis 9.4 h
- Otsego 8.3 h
- Montgomery 5.5 h
- Oneida 5.2 h
- St. Lawrence 4.7 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 27,865 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 →