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St. Lawrence storm history

Storm events recorded in St. Lawrence, New York between 1950 and 2025.

453
Total events
10
Tornadoes
71
Hail
25
Floods
1
Deaths
$53.5M
Property damage

Most significant events

Strongest tornadoes, deadliest events, and biggest damage in this county. Up to 50 shown.

August 15, 1986 · St. Lawrence, New York
Tornado F2 Tornado1 death, 3 injuries
August 9, 2024 · St. Lawrence, New York
Flash Flood Flash Flood$1.5M damage
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.
August 9, 2024 · St. Lawrence, New York
Flash Flood Flash Flood$3.0M damage
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…
August 9, 2024 · St. Lawrence, New York
Flood Flood$2.0M damage
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.
April 15, 2014 · St. Lawrence, New York
Flood Flood$4.1M damage
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…
July 15, 1995 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind$34.0M damage
September 4, 2025 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Tree and numerous branches downed by thunderstorm winds along NY Route 812.
September 4, 2025 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
A Tree reported downed by thunderstorm winds on NY-37 near Serenity View Campground.
August 24, 2025 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Several reports of trees, branches down on utility lines in the Hannawa Falls-West Parishville area.
August 24, 2025 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Tree and powerlines down across Highway 11B.
July 13, 2025 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Downed trees on County Route 24, southwest of Fullerville.
July 13, 2025 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Report of downed trees with one laying on utility wires on County Rd 77.
July 3, 2025 · St. Lawrence, New York
Hail Hail
Half to dollar size hail reported.
July 3, 2025 · St. Lawrence, New York
Hail Hail
Half to dollar size hail reported.
July 3, 2025 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Tree down on power lines in Haggerty road along with other limb and branch damage in the vicinity.
June 24, 2025 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
A few trees and many branches downed by thunderstorm winds in the West Potsdam vicinity, including Baghdad Road.
June 24, 2025 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Trees and several branches down in West Pierrepont.
June 22, 2025 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
In addition to the observed wind gusts, there were several branches broken from trees and yard debris thrown around.
August 11, 2024 · St. Lawrence, New York
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.
August 9, 2024 · St. Lawrence, New York
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…
July 24, 2024 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
A few trees downed by thunderstorm winds on Judson Street.
July 24, 2024 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Trees on powerlines due to thunderstorm winds along Wright and Finnegan Rd.
July 24, 2024 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
A few reports of trees down and on utility lines in the Norwood vicinity.
July 10, 2024 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Downed tree or two due to thunderstorm winds.
July 10, 2024 · St. Lawrence, New York
Lightning Lightning
A structure fire was caused by a lightning strike according to emergency officials.
June 23, 2024 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Several trees downed by thunderstorm winds.
May 27, 2024 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Downed tree and limbs into powerlines.
May 27, 2024 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
A few downed powerlines caused by downed trees onto lines.
August 4, 2023 · St. Lawrence, New York
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…
July 16, 2023 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Several trees and branches downed by thunderstorm winds.
July 13, 2023 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Several trees downed by thunderstorm winds on the road, reported by local law enforcement.
July 13, 2023 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Several trees downed by thunderstorm winds.
December 25, 2022 · St. Lawrence, New York
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…
July 28, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Utility lines downed by fallen branches and a few trees.
July 24, 2022 · St. Lawrence, New York
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.
July 19, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
A few trees down across Route 11C in Winthrop.
July 19, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Trees down along Route 14.
July 19, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Several reports of trees down across wires and a tree or two snapped including along Routes 3 and 10.
July 19, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Several large tree branches and a tree down.
July 12, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Trees ands wires downed by thunderstorm winds on James street.
July 12, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Trees ands wires downed by thunderstorm winds.
June 16, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Trees and powerlines down across Willard road.
June 16, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Trees and powerlines down across Cornell Avenue and other locations.
June 16, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Numerous trees and power lines down across the Hammond area including Route 37 and neighboring roads.
June 16, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Powerlines down and tree damage along Route 68 between Pike Road and Morrill Road.
June 16, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Widespread trees and utility lines damaged in Colton and neighboring communities.
May 16, 2022 · St. Lawrence, New York
Hail Hail
Hail reported with estimated hail size of a quarter (one-inch in diameter).
May 16, 2022 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Numerous trees and power lines downed by thunderstorm winds, as well as a few structures receiving minor damage.
July 20, 2021 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
Numerous trees and power lines downed by thunderstorm winds.
July 20, 2021 · St. Lawrence, New York
Thunderstorm Wind Thunderstorm Wind
A 63 mph wind gust was recorded at the KOGS AWOS site. Numerous trees and power lines down across town.

Events by year

YearEventsTornadoes
2025120
2024131
202340
2022160
2021170
2020200
2019120
201840
2017240
2016140
201540
201490
2013250
2012210
2011180
2010120
200990
2008200
2007220
200660
2005180
200442
200370
2002110
200180
2000100
199960
1998140
199780
1996100
1995110
1994140
199120
199040
198921
198841
198791
198631
198511
198430
198330
198020
197910
197610
197320
197211
197040
196940
196610
196210
195810
195411