List of Canadian tornadoes and tornado outbreaks (since 2001)

Fewer than 5% of tornadoes in Canada are rated F3 or higher in intensity, where wind speeds are in excess of 225 km/h (140 mph).

Prior to April 1, 2013, Canada used a slightly modified Fujita scale, and as of that date the Enhanced Fujita scale, again slightly modified, was put into use to rate tornado intensity, based on the damage to buildings and vegetation.

The peak season in Canada is through the summer months (June to August) when clashing air masses move north, as opposed to the spring season in the United States southern-central plains, although tornadoes in Canada have occurred in spring, fall and very rarely winter.

The upswing could also be attributed to other factors, such as improved aerial and ground damage assessment after the fact in sparsely populated areas (particularly the case in remote parts of the Canadian Prairies and Northern Ontario, for example), better trained spotter capabilities and increased use of digital recording devices by citizens.

Twelve medium to large size Canadian cities have been hit by significant strength tornadoes (F3/EF3 or higher), which caused large-scale damage and fatalities: Toronto (1868); Regina (1912); Windsor (1946 and 1974); Sarnia (1953); LaSalle (1956); Sudbury (1970); Woodstock (1979); Lloydminster (1983); Barrie (1985); Edmonton (1987); Aylmer (1994 and 2018); and Ottawa-Gatineau (1888 and 2018).