Tornado Alley
States such as Missouri, Iowa, Minnesota, Wisconsin, Illinois, Indiana, and western Ohio are sometimes included in Tornado Alley. Research suggests that tornadoes are becoming more frequent in the northern parts of Tornado Alley where it reaches the Canadian prairies.
Canada Tornado Alley
Over the years, the location(s) of the Canadian Tornado Alley(s) have been better defined. No complete definition of Canadian Tornado Alley has ever been officially designated and announced by the Environment and Climate Change Canada (ECCC).