<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>
tornadoes commonly occur in which of the following regions of the united states
The Great Plains the Midwest the Mississippi Valley the southern United States