<P> Most tornadoes in the United States occur east of the Rocky Mountains . The Great Plains , the Midwest , the Mississippi Valley and the southern United States are all areas that are vulnerable to tornadoes . They are relatively rare west of the Rockies and are also less frequent in the northeastern states . Tornado Alley is a colloquial term for an area particularly prone to tornadoes . There is no officially defined ' Tornado Alley ' -- at its broadest this area stretches from North Texas to Canada with its core centered on Oklahoma , Kansas and northern Texas . Another highly significant region -- colloquially known as Dixie Alley -- is the southern United States and particularly the northern and central parts of Alabama and Mississippi . Florida is one of the most tornado - prone states . However , Florida tornadoes only rarely approach the strength of those that occur elsewhere . </P>
<P> Most tornadoes in the United States occur east of the Rocky Mountains . The Great Plains , the Midwest , the Mississippi Valley and the southern United States are all areas that are vulnerable to tornadoes . They are relatively rare west of the Rockies and are also less frequent in the northeastern states . Tornado Alley is a colloquial term for an area particularly prone to tornadoes . There is no officially defined ' Tornado Alley ' -- at its broadest this area stretches from North Texas to Canada with its core centered on Oklahoma , Kansas and northern Texas . Another highly significant region -- colloquially known as Dixie Alley -- is the southern United States and particularly the northern and central parts of Alabama and Mississippi . Florida is one of the most tornado - prone states . However , Florida tornadoes only rarely approach the strength of those that occur elsewhere . </P>
where do tornadoes most commonly occur in the us
where do tornadoes most commonly occur in the us
east of the Rocky Mountains
east of the Rocky Mountains