Power outage history
Tompkins County New York
3.8hours
without power for the average customer in a typical year, 2018–2025
49th most of 62 in New York 43% below 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 Tompkins's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2024 was the worst well-recorded year, at 8.9 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Tompkins, 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 |
|---|---|---|---|---|---|---|
| Jul 15, 2024 | Thunderstorms | 6,476 | 10% | 48 h | 21 h | 138k |
| Nov 22, 2024 | Winter storm | 7,772 | 12% | 34 h | 28 h | 113k |
| Jan 9, 2024 | No storm report | 9,629 | 15% | 26 h | 19 h | 104k |
| Mar 16, 2025 | Thunderstorms | 8,938 | 14% | 26 h | 24 h | 83k |
| Apr 3, 2024 | No storm report | 9,033 | 14% | 12 h | 6.5 h | 61k |
| Jul 24, 2022 | Thunderstorms | 12,355 | 19% | 9.8 h | 6.2 h | 51k |
| Jul 3, 2025 | Thunderstorms | 3,799 | 6% | 27 h | 25 h | 46k |
| Jun 27, 2023 | No storm report | 4,757 | 7% | 10 h | 12 h | 36k |
| Apr 1, 2023 | No storm report | 4,012 | 6% | 12 h | 9.5 h | 26k |
| Jun 13, 2018 | Thunderstorms | 4,313 | 7% | 12 h | 10 h | 23k |
| Jun 12, 2015 | Thunderstorms | 4,085 | 6% | 7.5 h | 12 h | 20k |
| Jun 22, 2024 | Thunderstorms | 3,932 | 6% | 8.2 h | 6.5 h | 20k |
| Jun 29, 2021 | Thunderstorms | 5,229 | 8% | 5.2 h | 3.5 h | 20k |
| Jul 30, 2019 | Thunderstorms | 3,120 | 5% | 8.2 h | – | 18k |
| Mar 2, 2018 | Winter storm | 2,001 | 3% | 15 h | – | 18k |
| Mar 7, 2022 | Thunderstorms | 3,945 | 6% | 7.0 h | 5.5 h | 16k |
| Jun 21, 2021 | Thunderstorms | 2,796 | 4% | 9.5 h | – | 16k |
| Jun 24, 2024 | No storm report | 5,576 | 9% | 7.8 h | 7.8 h | 16k |
| Feb 21, 2019 | No storm report | 3,473 | 5% | 7.0 h | 6.8 h | 16k |
| Jun 14, 2018 | No storm report | 2,914 | 5% | 8.5 h | – | 16k |
| Feb 7, 2020 | Winter storm | 1,853 | 3% | 15 h | – | 14k |
| Feb 4, 2017 | No storm report | 7,218 | 11% | 2.2 h | 1.8 h | 13k |
| Jul 17, 2021 | Thunderstorms | 1,971 | 3% | 6.5 h | – | 13k |
| Mar 26, 2021 | No storm report | 3,724 | 6% | 5.5 h | 5.2 h | 12k |
| Aug 8, 2019 | Thunderstorms | 4,162 | 7% | 7.5 h | 7.0 h | 12k |
| Dec 2, 2019 | Winter storm | 2,255 | 4% | 5.5 h | – | 11k |
| Jul 21, 2022 | No storm report | 1,939 | 3% | 5.8 h | – | 11k |
| Oct 30, 2017 | No storm report | 2,058 | 3% | 5.8 h | – | 11k |
| Aug 4, 2022 | No storm report | 3,446 | 5% | 3.2 h | 2.8 h | 11k |
| Mar 10, 2019 | No storm report | 8,366 | 13% | 1.2 h | 1.2 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 Tompkins from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 51%
- Thunderstorms 36%
- Winter storm 12%
- Tropical storm 1.4%
Who keeps the lights on
Utilities serving Tompkins
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 |
|---|---|---|---|---|---|---|
| New York State Elec & Gas Corp | Investor Owned | 302 | 146 | 1.85 | 22.6 | 794k |
| Village of Groton | NY | – | – | – | – | 16k |
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.
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 63,720 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 →