Tornado Alley is the area east of the Rockies that stretches from Texas to the Dakotas. Several times a year tornadoes affect that area. Of course tornadoes can and have hit every state in the U.S.
Recent research is showing another concentration of tornadoes across the deep south and southeast U.S. This "Dixie" Alley stretches from Arkansas and Louisiana to Georgia and as far north as Kentucky. The death rate from tornadoes is much higher in this area for several reasons.
In the past 10 years 49 percent of tornado related fatalities across the south occurred in manufactured homes. There is a much higher density of manufactured homes in this area.
Lack of visibility from hills and forested area prevent storms from being seen.
Due to a lack of a well defined severe weather season, complacency exists in this area.