St. Lawrence County, New York
Tornadoes, hail, floods and severe storms recorded here between 1954 and 2026, from NOAA's Storm Events Database. Search an address to see which tornadoes came closest to it.
11
Tornado reports
72
Hail reports
25
Floods since 1996
464
All events
1
Deaths
$53.7M
Property damage
Tornado paths in St. Lawrence County
The part of each tornado’s path NOAA recorded in this county, 11 in all. Zoom in and the paths widen to their surveyed width.
EF0EF1EF2EF3EF4EF5Unrated
Year by year
All storm eventsTornadoes
NOAA's storm database records tornadoes back to 1950 and hail and thunderstorm wind back to 1955, but floods only from 1996 on. Older floods are missing here. For those, the U.S. Geological Survey's stream gauge records and flood reports are the place to look.
Most significant events
The strongest tornadoes, deadliest events and biggest damage here, up to 50.
Emergency Mgmt. and Dept. of Highways reported numerous roads closed or damaged due to flash flooding in the towns of Gouverneur, Fowler, Edwards and Hermon. This included, but was not limited to Route 58.
Emergency Mgmt. reported widespread flash flooding across the area with numerous roads closed or washed out due to severe flash flooding. This included, but was not limited to US Route 11 in numerous locations. Some homes and bridges were also damaged with a few swift water rescu…
Numerous flooding across St. Lawrence county as the results of heavy tropical rains (4 to 6+ inches) from Post Tropical Debby. In addition to flash flooding reports, there were numerous inundation, basement and other flooding.
Heavy rainfall and snowmelt combined to produce flooding across St. Lawrence County. The Grass and St. Regis Rivers were particularly hard hit, and the Oswegatchie and its tributaries continued to run high from flooding in the previous week. Along the St. Regis, two homes were ev…
Thunderstorm Wind Thunderstorm Wind
A few trees down across State Highway 812 and neighboring roads.
Thunderstorm Wind Thunderstorm Wind
Several trees and power lines down on roads.
Thunderstorm Wind Thunderstorm Wind
Report of trees down in Potsdam.
Tornado EF0 Tornado
Public reported a tornado between North Hammond and Brier Hill, New York. Video indicates the EF-0 tornado touched down in the nearby corn field and toppled an apple tree and lifted a well cover into a window of a barn.
Thunderstorm Wind Thunderstorm Wind
Trees down along Mill Street near Silver Lake.
Thunderstorm Wind Thunderstorm Wind
Tree and numerous branches downed by thunderstorm winds along NY Route 812.
Thunderstorm Wind Thunderstorm Wind
A Tree reported downed by thunderstorm winds on NY-37 near Serenity View Campground.
Thunderstorm Wind Thunderstorm Wind
Several reports of trees, branches down on utility lines in the Hannawa Falls-West Parishville area.
Thunderstorm Wind Thunderstorm Wind
Tree and powerlines down across Highway 11B.
Thunderstorm Wind Thunderstorm Wind
Downed trees on County Route 24, southwest of Fullerville.
Thunderstorm Wind Thunderstorm Wind
Report of downed trees with one laying on utility wires on County Rd 77.
Hail Hail
Half to dollar size hail reported.
Hail Hail
Half to dollar size hail reported.
Thunderstorm Wind Thunderstorm Wind
Tree down on power lines in Haggerty road along with other limb and branch damage in the vicinity.
Thunderstorm Wind Thunderstorm Wind
A few trees and many branches downed by thunderstorm winds in the West Potsdam vicinity, including Baghdad Road.
Thunderstorm Wind Thunderstorm Wind
Trees and several branches down in West Pierrepont.
Thunderstorm Wind Thunderstorm Wind
In addition to the observed wind gusts, there were several branches broken from trees and yard debris thrown around.
Tornado EF0 Tornado
A brief tornado occurred south of Country Club road near Matoon Creek. EF-0 damage based on NY State Homeland Security and Emergency Services drone footage.
Flash Flood Flash Flood
Tribal Emergency Mgmt. reported flash flooding in and around Hogansburg, NY due to excessive rainfall. Numerous other locations of flash flooding were observed in the towns of Bombay, Helena and Ft. Covington. Locations included, but were not limited to NY State Route 37 and Beav…
Thunderstorm Wind Thunderstorm Wind
A few trees downed by thunderstorm winds on Judson Street.
Thunderstorm Wind Thunderstorm Wind
Trees on powerlines due to thunderstorm winds along Wright and Finnegan Rd.
Thunderstorm Wind Thunderstorm Wind
A few reports of trees down and on utility lines in the Norwood vicinity.
Thunderstorm Wind Thunderstorm Wind
Downed tree or two due to thunderstorm winds.
Lightning Lightning
A structure fire was caused by a lightning strike according to emergency officials.
Thunderstorm Wind Thunderstorm Wind
Several trees downed by thunderstorm winds.
Thunderstorm Wind Thunderstorm Wind
Downed tree and limbs into powerlines.
Thunderstorm Wind Thunderstorm Wind
A few downed powerlines caused by downed trees onto lines.
Flash Flood Flash Flood
Persistent showers and thunderstorms affected the southern portions of St. Lawrence County, NY during the late afternoon and evening hours on August 4, 2023. Radar estimates of between two and five inches of rain fell in this area, particularly in the Town of Pitcairn where emerg…
Thunderstorm Wind Thunderstorm Wind
Several trees and branches downed by thunderstorm winds.
Thunderstorm Wind Thunderstorm Wind
Several trees downed by thunderstorm winds on the road, reported by local law enforcement.
Thunderstorm Wind Thunderstorm Wind
Several trees downed by thunderstorm winds.
Flash Flood Flash Flood
High flows on the Raquette River near the Hannawa Falls Dam led to ice breakup on December 25, 2022. Ice became jammed and impounded behind the Hannawa Falls Dam due to slowing flows which led to rapid rises in the river during late morning. Approximately four homes along T-Alexa…
Thunderstorm Wind Thunderstorm Wind
Utility lines downed by fallen branches and a few trees.
Thunderstorm Wind Thunderstorm Wind
Several reports of trees and utility lines down in the Morley vicinity, including at the Intersection of Routes 68 and 14.
Thunderstorm Wind Thunderstorm Wind
A few trees down across Route 11C in Winthrop.
Thunderstorm Wind Thunderstorm Wind
Trees down along Route 14.
Thunderstorm Wind Thunderstorm Wind
Several reports of trees down across wires and a tree or two snapped including along Routes 3 and 10.
Thunderstorm Wind Thunderstorm Wind
Several large tree branches and a tree down.
Thunderstorm Wind Thunderstorm Wind
Trees ands wires downed by thunderstorm winds on James street.
Thunderstorm Wind Thunderstorm Wind
Trees ands wires downed by thunderstorm winds.
Thunderstorm Wind Thunderstorm Wind
Trees and powerlines down across Willard road.
Thunderstorm Wind Thunderstorm Wind
Trees and powerlines down across Cornell Avenue and other locations.
Thunderstorm Wind Thunderstorm Wind
Numerous trees and power lines down across the Hammond area including Route 37 and neighboring roads.
Thunderstorm Wind Thunderstorm Wind
Powerlines down and tree damage along Route 68 between Pike Road and Morrill Road.
Events by year, as a table
| Year | Events | Tornadoes |
|---|---|---|
| 2026 | 5 | 1 |
| 2025 | 12 | 0 |
| 2024 | 13 | 1 |
| 2023 | 4 | 0 |
| 2022 | 16 | 0 |
| 2021 | 17 | 0 |
| 2020 | 20 | 0 |
| 2019 | 12 | 0 |
| 2018 | 4 | 0 |
| 2017 | 24 | 0 |
| 2016 | 14 | 0 |
| 2015 | 4 | 0 |
| 2014 | 9 | 0 |
| 2013 | 25 | 0 |
| 2012 | 21 | 0 |
| 2011 | 18 | 0 |
| 2010 | 12 | 0 |
| 2009 | 9 | 0 |
| 2008 | 20 | 0 |
| 2007 | 22 | 0 |
| 2006 | 6 | 0 |
| 2005 | 18 | 0 |
| 2004 | 4 | 2 |
| 2003 | 7 | 0 |
| 2002 | 11 | 0 |
| 2001 | 8 | 0 |
| 2000 | 10 | 0 |
| 1999 | 6 | 0 |
| 1998 | 14 | 0 |
| 1997 | 14 | 0 |
| 1996 | 10 | 0 |
| 1995 | 11 | 0 |
| 1994 | 14 | 0 |
| 1991 | 2 | 0 |
| 1990 | 4 | 0 |
| 1989 | 2 | 1 |
| 1988 | 4 | 1 |
| 1987 | 9 | 1 |
| 1986 | 3 | 1 |
| 1985 | 1 | 1 |
| 1984 | 3 | 0 |
| 1983 | 3 | 0 |
| 1980 | 2 | 0 |
| 1979 | 1 | 0 |
| 1976 | 1 | 0 |
| 1973 | 2 | 0 |
| 1972 | 1 | 1 |
| 1970 | 4 | 0 |
| 1969 | 4 | 0 |
| 1966 | 1 | 0 |
| 1962 | 1 | 0 |
| 1958 | 1 | 0 |
| 1954 | 1 | 1 |
Search your address
See every tornado that passed within 25 miles of a place in St. Lawrence County, measured to its path.
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