Tornado History Map

St. Lawrence County, New York tornado history

11 tornadoes recorded in or across St. Lawrence County from 1954 to 2024, coloured by rating on the map.

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Years1950 to 2025
Rating (F or EF scale)

Shows tornadoes that started in, or crossed, the chosen state. To see how many have passed near you, search a town or ZIP code, or tap the map.

Key
  • F0 / EF0 Light damage
  • F1 / EF1 Moderate damage
  • F2 / EF2 Considerable damage
  • F3 / EF3 Severe damage
  • F4 / EF4 Devastating damage
  • F5 / EF5 Incredible damage
  • Unknown Not rated (2007 onwards)

How to read the lines. Each line is one tornado, drawn from where it started to where it ended, coloured and sized by its rating. A dot means the record has no end point. Tap a line for its details, or tap anywhere else to see how many tornadoes have passed nearby. Weaker tornadoes appear as you zoom in. Ratings use the Fujita (F) scale before 1 February 2007 and the Enhanced Fujita (EF) scale from then on.

Tornadoes in St. Lawrence County

The Storm Prediction Center records 11 tornadoes whose paths touched St. Lawrence County, New York between 1954 and 2024. They killed 1 person and injured 4. The busiest month is August, with 4 tornadoes. The strongest was an F2 on 15 August 1986. The most recent was on 11 August 2024.

  • 11tornadoes
  • 1death
  • 4injuries
  • 41per 10,000 sq mi of land

A tornado that crossed several counties counts in each one, so county counts add up to more than the state's.

How strong were the tornadoes in St. Lawrence County?

RatingTornadoesShare
F0 / EF0655%
F1 / EF1327%
F2 / EF2218%
F3 / EF300%
F4 / EF400%
F5 / EF500%
Unknown rating00%

St. Lawrence County tornadoes over time

Tornadoes by decade
Bar chart of tornadoes by period. The most is 5 in 1980s.1950s11970s11980s51990s12000s22020s1

The 2020s only run to 2024, so that bar is for a shorter period. The record starts in 1950.

Show the numbers
PeriodCount
1950s1
1970s1
1980s5
1990s1
2000s2
2020s1
Tornadoes by month
Bar chart of tornadoes by period. The most is 4 in Aug.Jan0Feb0Mar0Apr0May1Jun3Jul2Aug4Sep1Oct0Nov0Dec0
Show the numbers
PeriodCount
Jan0
Feb0
Mar0
Apr0
May1
Jun3
Jul2
Aug4
Sep1
Oct0
Nov0
Dec0

Records for St. Lawrence County

  • Deadliest and Strongest: New York tornado15 August 1986, F2, 1 death, 3 injuries, 0.2 miles long
  • Longest path: New York tornado31 May 1985, F1, 5 miles long
  • Most recent: New York tornado11 August 2024, EF0, 0.1 miles long

Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.

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