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Flood in Seneca County, New York
27 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
Seneca County, New York, has 27 flood events in the NCEI record since 1950, with at least one in 12 different years.
August is the busiest month, with 11 of the recorded events. The last 20 years account for 19 events against 8 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.4% of the 6,836 flood events recorded in New York; its 8.3 per 100 square miles compares with 14.5 statewide.
Compared with New York
| Measure | Seneca County | New York | US |
|---|---|---|---|
| Flood events since 1950 | 27 | 6,836 | 183,559 |
| Per 100 square miles | 8.3 | 14.5 | 5.2 |
| Per 10,000 residents | 8.0 | 3.4 | 5.5 |
| Deaths recorded | 0 | 117 | 2,961 |
| Busiest month | August | July | June |
By year
Seasonality
2Feb
0Mar
1Apr
5May
1Jun
2Jul
2Aug
11Sep
0Oct
2Nov
1Dec
0
Recorded events
All 27 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 31 Mar 2026 | Flash Flood | — | $2K | — | — | — | County |
| 9 Jun 2025 | Flash Flood | — | $5K | — | — | — | County |
| 9 Aug 2024 | Flash Flood | — | $1K | — | — | — | County |
| 20 Jun 2024 | Flash Flood | — | $1K | — | — | — | County |
| 5 Apr 2023 | Flood | — | $20K | — | — | — | County |
| 5 Apr 2023 | Flood | — | $5K | — | — | — | County |
| 5 Apr 2023 | Flood | — | $15K | — | — | — | County |
| 26 Oct 2021 | Flash Flood | — | $150K | — | — | — | County |
| 26 Oct 2021 | Flash Flood | — | $100K | — | — | — | County |
| 18 Aug 2021 | Flash Flood | — | $30K | — | — | — | County |
| 18 Aug 2021 | Flash Flood | — | $140K | — | — | — | County |
| 14 Aug 2018 | Flash Flood | — | $50K | — | — | — | County |
| 14 Aug 2018 | Flash Flood | — | $1.2M | — | — | — | County |
| 14 Aug 2018 | Flash Flood | — | $125K | — | — | — | County |
| 14 Aug 2018 | Flash Flood | — | $10K | — | — | — | County |
| 12 Jan 2018 | Flood | — | — | — | — | — | County |
| 3 Aug 2014 | Flash Flood | — | $125K | — | — | — | County |
| 3 Aug 2014 | Flash Flood | — | $10K | — | — | — | County |
| 14 May 2014 | Flash Flood | — | $15K | — | — | — | County |
| 2 Apr 2005 | Flash Flood | — | $50K | — | — | — | County |
| 14 Jul 2004 | Flash Flood | — | $5K | — | — | — | County |
| 5 Aug 2003 | Flash Flood | — | $100K | — | — | — | County |
| 1 Aug 2000 | Flash Flood | — | — | — | — | — | County |
| 31 Jul 2000 | Flash Flood | — | — | — | — | — | County |
| 8 Nov 1996 | Flash Flood | — | $100K | — | — | — | County |
| 30 Apr 1996 | Flash Flood | — | $3K | — | — | — | County |
| 19 Jan 1996 | Flash Flood | — | $500K | — | — | — | County |
Questions and answers
How many flood events has Seneca County had?
27 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Seneca County?
31 Mar 2026 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Seneca County?
The flash flood of 14 Aug 2018, with property damage estimated by NCEI at $1.2M.
How does Seneca County compare with New York for flood?
8.3 events per 100 square miles against 14.5 statewide; the county holds 27 of the state's 6,836 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.