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Flood in Hamilton County, New York
48 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.
NCEI records 48 flood events in Hamilton County, New York, between 1950 and 2026, spread over 15 years.
January is the busiest month, with 8 of the recorded events. The last 20 years account for 23 events against 25 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 0.7% of the 6,836 flood events recorded in New York; its 2.8 per 100 square miles compares with 14.5 statewide.
Compared with New York
| Measure | Hamilton County | New York | US |
|---|---|---|---|
| Flood events since 1950 | 48 | 6,836 | 183,559 |
| Per 100 square miles | 2.8 | 14.5 | 5.2 |
| Per 10,000 residents | 93.8 | 3.4 | 5.5 |
| Deaths recorded | 0 | 117 | 2,961 |
| Busiest month | January | July | June |
By year
Seasonality
8Feb
1Mar
3Apr
7May
4Jun
3Jul
2Aug
0Sep
0Oct
8Nov
7Dec
5
Recorded events
All 48 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 |
|---|---|---|---|---|---|---|---|
| 10 Jul 2024 | Flash Flood | — | $500 | — | — | — | County |
| 18 Dec 2023 | Flood | — | $10K | — | — | — | County |
| 18 Dec 2023 | Flood | — | $10K | — | — | — | County |
| 11 Jul 2023 | Flood | — | $2.5M | — | — | — | County |
| 24 Feb 2022 | Flood | — | $50K | — | — | — | County |
| 25 Dec 2020 | Flood | — | — | — | — | — | County |
| 1 Nov 2019 | Flood | — | $1.2M | — | — | — | County |
| 1 Nov 2019 | Flood | — | — | — | — | — | County |
| 1 Nov 2019 | Flood | — | — | — | — | — | County |
| 1 Nov 2019 | Flood | — | — | — | — | — | County |
| 1 Nov 2019 | Flood | — | — | — | — | — | County |
| 31 Oct 2019 | Flash Flood | — | — | — | — | — | County |
| 31 Oct 2019 | Flash Flood | — | — | — | — | — | County |
| 31 Oct 2019 | Flash Flood | — | — | — | — | — | County |
| 31 Oct 2019 | Flash Flood | — | — | — | — | — | County |
| 31 Oct 2019 | Flood | — | — | — | — | — | County |
| 31 Oct 2019 | Flash Flood | — | — | — | — | — | County |
| 12 Jan 2018 | Flood | — | — | — | — | — | County |
| 1 May 2011 | Flood | — | — | — | — | — | County |
| 28 Apr 2011 | Flood | — | — | — | — | — | County |
| 28 Apr 2011 | Flood | — | — | — | — | — | County |
| 28 Apr 2011 | Flood | — | — | — | — | — | County |
| 7 Mar 2011 | Flood | — | — | — | — | — | County |
| 17 Nov 2006 | Flood | — | — | — | — | — | County |
| 28 Oct 2006 | Flood | — | — | — | — | — | County |
| 20 Oct 2006 | Flood | — | — | — | — | — | County |
| 28 Jun 2006 | Flood | — | — | — | — | — | County |
| 28 Jun 2006 | Flood | — | — | — | — | — | County |
| 23 Apr 2006 | Flood | — | — | — | — | — | County |
| 18 Jan 2006 | Flood | — | — | — | — | — | Forecast zone |
| 24 May 2004 | Flash Flood | — | — | — | — | — | County |
| 24 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 24 May 2004 | Flood | — | — | — | — | — | Forecast zone |
| 7 Mar 2004 | Flood | — | — | — | — | — | Forecast zone |
| 24 Jan 2003 | Flood | — | — | — | — | — | Forecast zone |
| 14 Apr 2002 | Flood | — | — | — | — | — | Forecast zone |
| 24 Jun 2001 | Flood | — | — | — | — | — | Forecast zone |
| 5 Apr 2000 | Flood | — | — | — | — | — | Forecast zone |
| 4 Jan 2000 | Flood | — | — | — | — | — | Forecast zone |
| 1 Apr 1998 | Flood | — | — | — | — | — | Forecast zone |
| 29 Mar 1998 | Flood | — | — | — | — | — | Forecast zone |
| 8 Jan 1998 | Flash Flood | — | $100K | — | — | — | County |
| 8 Jan 1998 | Flood | — | $50K | — | — | — | Forecast zone |
| 8 Jan 1998 | Flood | — | — | — | — | — | Forecast zone |
| 2 Dec 1996 | Flash Flood | — | $5K | — | — | — | County |
| 2 Dec 1996 | Flash Flood | — | $5K | — | — | — | County |
| 9 Nov 1996 | Flood | — | $20K | — | — | — | Forecast zone |
| 19 Jan 1996 | Flood | — | $200K | — | — | — | Forecast zone |
Questions and answers
How many flood events has Hamilton County had?
48 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 Hamilton County?
10 Jul 2024 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Hamilton County?
The flood of 11 Jul 2023, with property damage estimated by NCEI at $2.5M.
How does Hamilton County compare with New York for flood?
2.8 events per 100 square miles against 14.5 statewide; the county holds 48 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.