Tornado Alley
The term was first used in 1952 as the title of a research project to study severe weather in areas of Texas, Oklahoma, Kansas, South Dakota, Iowa, Missouri, Nebraska, Colorado, North Dakota, and Minnesota. It is largely a media-driven term although tornado climatologists distinguish peaks in activity in certain areas and storm chasers have long recognized the Great Plains tornado belt.
Canada Tornado Alley
The Canadian Tornado Alley(s) is a term describing a tornado-prone region in Canada. In Canada, the word is rarely used when compared to that of the United States where their "Tornado Alley" is largely a media-driven term.