Flood events in St. Lawrence County, New York The flood events on record, by date and by year
This page is a county record of past events and claims. It does not show the flood zone or the risk of an address. For the flood map of an address, use FEMA's address search (opens in a new tab).
NCEI has 25 flood events on record for St. Lawrence County, New York, from 1996 through 30 Jun 2026.
The newest flood event on record is on 9 Aug 2024.
From 2016 through 2025, NCEI has 8 flood events on record for the county.
The NWS collects event reports from a variety of sources, which include (but are not limited to): county, state, and federal emergency management officials, local law enforcement officials, SKYWARN spotters, NWS damage surveys, newspaper clipping services, the insurance industry, and the general public, among others.
The National Weather Service reports property and crop damage estimates using available data at the time of event reporting. These values should therefore be considered broad estimates. Damage amounts are not adjusted for inflation.
Zone (NWS Forecast Zone): A zone is a geographic area defined by the NWS for issuing forecasts, watches, and warnings. While zones often align with counties, they can also represent smaller or subdivided areas within a county to account for differences in weather conditions, such as elevation or proximity to water. Larger-scale events—such as heat, cold, drought, and winter storms—are typically recorded by zone.
The words of the agency. Source: NOAA NCEI, Storm Events Database, page "Frequently Asked Questions", copied on .
Date of the data: NCEI storm events through . Event types on this page: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
Newest flood events on record
Flood
1 mile NNW of NELSON CORNERS. Damage estimate: $2.0 million
Flash Flood
2 miles NE of GRANTVILLE. Damage estimate: $500 thousand
Flash Flood
4 miles NE of RENSSELAER FALLS. Damage estimate: $3.0 million
Flash Flood
3 miles NW of WEGATCHIE. Damage estimate: $1.5 million
Flash Flood
2 miles W of EAST PITCAIRN. Damage estimate: $75 thousand
Flash Flood
1 mile NW of BROWNS BRIDGE. Damage estimate: $100 thousand
Flash Flood
1 mile N of MORRISTOWN. Damage estimate: $100 thousand
Flash Flood
1 mile W of RUSSELL. Damage estimate: $5 thousand
Flood
2 miles NNW of NORTH CORNERS. Damage estimate: $4.1 million
Flood
1 mile SE of SPRAGUEVILLE. Damage estimate: $10 thousand
Flood
1 mile W of PLUMBROOK
Flood
1 mile W of PLUMBROOK. Damage estimate: $1.0 million
Flood
3 miles SW of OGDENSBURG. Damage estimate: $150 thousand
Flood
3 miles SW of OGDENSBURG. Damage estimate: $150 thousand
Flood
2 miles NE of STOCKHOLM CENTER. Damage estimate: $40 thousand
Flash Flood
At BALMAT. Damage estimate: $25 thousand
Flash Flood
At SOUTH PORTION. Damage estimate: $500 thousand
Flash Flood
At SOUTHWEST PORTION. Damage estimate: $75 thousand
Flash Flood
At COUNTYWIDE. Damage estimate: $10 thousand
Flash Flood
At COUNTYWIDE. Damage estimate: $10 thousand
Flash Flood
At SOUTH PORTION. Damage estimate: $5 thousand
Flash Flood
At COUNTYWIDE
Flash Flood
At COUNTYWIDE. Damage estimate: $10 thousand
Flash Flood
At SOUTH PORTION. Damage estimate: $5 thousand
Flash Flood
At COUNTYWIDE. Damage estimate: $30 thousand
A place is the text of the NCEI record: a distance and a direction from a reference place. The site does not show a place text that names a private property or reads as a person. NCEI gives no magnitude for this hazard.
Flood events by year
| Decade | Year that ends in 0 | Year that ends in 1 | Year that ends in 2 | Year that ends in 3 | Year that ends in 4 | Year that ends in 5 | Year that ends in 6 | Year that ends in 7 | Year that ends in 8 | Year that ends in 9 | All |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1950s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1960s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1970s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1980s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1990s | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | 1 | 5 |
| 2000s | 2 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 0 | 5 |
| 2010s | 3 | 2 | 0 | 0 | 2 | 0 | 0 | 2 | 0 | 0 | 9 |
| 2020s | 0 | 0 | 1 | 1 | 4 | 0 | 0 (part of the year) | 6 |
A darker cell has a larger count. The number is in each cell.
Flood and flash flood events are on record from 1996. The year 2026 has the events through 30 Jun 2026 only.
By month, all years
- Jan2 events
- Feb1 event
- Mar1 event
- Apr4 events
- May2 events
- Jun1 event
- Jul3 events
- Aug6 events
- Sep2 events
- Oct1 event
- Nov1 event
- Dec1 event
Beside the other counties
| Measure | St. Lawrence | All counties of New York | All counties of the United States |
|---|---|---|---|
| Flood events, 1996 to 2026 | 25 | 6,145 | 177,902 |
| Events for each 100 square miles | 0.9 | 13.0 | 5.0 |
| Events for each 10,000 residents | 2.3 | 3.1 | 5.4 |
The columns for the state and the United States total the counties. They count the events of each county in the same way as the county column. A forecast zone with another name than a county counts for the state only.
Official channels
- NCEI Storm Events Database (opens in a new tab)Search the full NCEI record by state, county and date.
- National Weather Service: Burlington, VT (opens in a new tab)The forecast office that issues the weather warnings for the county.
- FEMA Flood Map Service Center: Search By Address (opens in a new tab)Search an address to see its flood map. This site has no flood-zone data.
These links open the pages of the agencies. The site checked the links on .
Cite this page
County Hazards. "Flood events on record for St. Lawrence County, New York". https://countyhazards.com/county/ny/st-lawrence/flood/. Data: NOAA NCEI Storm Events Database through 30 Jun 2026. Page made on .
Questions
- Which month has the most flood events on record for St. Lawrence County?
- August has 6 of the 25 flood events on record from 1996 through 30 Jun 2026.
- How many flood events are on record for New York?
- NCEI has 6,836 flood events on record for New York from 1996 through 30 Jun 2026. That count has every forecast zone of the state.
- How does St. Lawrence County compare with the other counties of New York?
- The counties of New York have 13.0 flood events for each 100 square miles. St. Lawrence County has 0.9.