What 19 states make up a tornado ally?

Answer 1

There is only one area known as Tornado Alley. It is located on the central plains of the United States from Texas to South Dakota and Iowa.

Other area of high tornado activity include Florida, Argentina, Australia, and South Africa.

Answer 2

There are no precisely defined boundaries to Tornado Alley, so there is no set number of states. Most maps, however, list fewer than 19 states. The most common maps list Texas, Oklahoma, Kansas, Nebraska, South Dakota and parts of Missouri and Colorado. Some maps also include parts of Iowa and Arkansas.