VorTek ranks states based on the latest National Weather Service data for tornadic activity, including statistics from 1950 through 2007.
The top twenty states, compiled by the company, are as follows:
1. Mississippi
2. Arkansas
3. Kansas
4. Oklahoma
5. Nebraska
6. Iowa
7. Indiana
8. Alabama
9. Illinois
10. Tennessee
11. Wisconsin
12. Georgia
13. Louisiana
14. North Carolina
15. Ohio
16. Kentucky
17. Missouri
18. Pennsylvania
19. Michigan
20. Minnesota