List of North American Tornadoes and Tornado Outbreaks - Canada

Canada

Event Date Area Tornadoes Casualties Notes
Bouctouche, New Brunswick tornado August 6, 1879 Bouctouche, New Brunswick – 5 fatalities, 10 injured Easternmost intense tornado in North America
1896 St. Louis – East St. Louis tornado May 24–25, 1896 Upper Mississippi Valley – Great Lakes (Ontario) – 79 fatalities, 215 injuries
St. Catharines Tornado September 26, 1898 St. Catharines, Ontario Tonawanda, New York – Ontario and New York – some fatalities, many injuries
Regina Cyclone June 30, 1912 Saskatchewan – 28 fatalities Deadliest Canadian tornado
1946 Windsor–Tecumseh, Ontario tornado June 17, 1946 Michigan – Ontario 1 18 fatalities
Sudbury, Ontario tornado August 20, 1970 Ontario – 6 fatalities F3 kills 6 in Sudbury and destroys numerous homes.
Super Outbreak April 3–4, 1974 Eastern United States – Ontario 148 total, 1 in Canada 315 fatalities total, 9 in Canada Second largest and most intense recorded outbreak; mostly impacted the United States, but one tornado occurred in Ontario.
1979 Woodstock, Ontario tornado August 7, 1979 Ontario – 2 fatalities Two F4s strike the City of Woodstock and surrounding farmland, at the same time.
1985 United States – Canadian tornado outbreak May 31, 1985 U.S. – Canadian Eastern Great Lakes 13 in Ontario 88 fatalities total, 12 in Canada Among most intense outbreaks recorded, largest recorded outbreak in the region (20 significant, 9 violent, 10 killer)
Edmonton tornado July 31, 1987 Alberta – 27 fatalities, 300 injuries Most destructive Canadian tornado
April 1996 tornado outbreak sequence April 19–22, 1996 Texas – Arkansas – Illinois – Indiana – Ontario 70 – Two F3's in southern Ontario
1997 Southeast Michigan tornado outbreak July 2, 1997 Southeast Michigan – Southwestern Ontario 13 7 fatalities One tornado passed through some Detroit neighborhoods, the suburbs of Hamtramck, and Highland Park. One also touched down near Windsor, Ontario
Pine Lake, Alberta Tornado July 14, 2000 Alberta – 12 fatalities
Southern Ontario Tornado Outbreak of 2005 August 19, 2005 Ontario 3 None $500 million in damages across Southern Ontario. Two F2's and an F1 tornado. Major flash flooding across the Greater Toronto Area.
Southern Ontario Tornado Outbreak of 2006 August 2, 2006 Ontario 11 None Was the largest single day tornado outbreak in Ontario since May 31, 1985 until the Southern Ontario Tornado Outbreak of 2009.
Elie, Manitoba tornado June 22, 2007 Manitoba 8 0 fatalities First confirmed F5 tornado in Canada's history.
Southern Ontario Tornado Outbreak of 2009 August 20, 2009 Ontario 18 1 fatality, numerous injuries Eighteen confirmed tornadoes struck cities and towns across southern sections of Central Ontario. Notably, significant damage (F2) and one death occurred at the town of Durham, while hundreds of homes were damaged and several destroyed by two F2 tornadoes that struck the city of Vaughan.
Early-June 2010 tornado outbreak June 5–6, 2010 Midwest, Ontario 53 total, 6 in Ontario No serious injuries. 6 tornadoes over two days occurred in Essex County, Ontario and the United Counties of Stormont, Dundas and Glengarry. Two tornadic supercells crossed Essex County overnight producing 5 confirmed tornadoes. The strongest was an F2 near Harrow, but an F1 tornado from the same storm hit the city of Leamington overnight causing millions in damage. No serious injuries occurred.
2011 Goderich, Ontario tornado August 21, 2011 Goderich, Ontario 1 1 fatality, 37 injuries An F3 tornado tore a 25 km path through Central Huron County severely damaging the town of Goderich and surrounding areas. The tornado caused $75million in damage and was also the strongest tornado in Ontario since the April 20, 1996 Southern Ontario tornado outbreak. .

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