An outline of Significant Tornado Alley in the United States, where the highest percentage of violent tornadoes occur

Tornado activity in the United States.

Tornado Alley is a colloquial term most often used to refer to the area of the United States in which tornadoes happen more than in any other part of the country. The 1974 super tornado outbreak with 148 tornadoes, took place in Georgia, Illinois, Indiana, Kentucky, Michigan, Mississippi, North Carolina, Ohio, South Carolina, Tennessee, Virginia, and West Virginia.