Is Tornado Alley moving east? 76 years of state shares
The record has shifted. Seven Southeast states went from 15.4% of US tornadoes in 1950-69 to 26.1% in 2010-25, while six Plains states fell from 45.6% to 30.0%.
Who gained and who lost
| Mississippi | 2.7 | 5.5 | 2.8 |
| Alabama | 2.5 | 5.2 | 2.7 |
| Illinois | 3.3 | 5.4 | 2.0 |
| Kentucky | 0.9 | 2.6 | 1.8 |
| Louisiana | 2.5 | 4.1 | 1.6 |
| Tennessee | 1.4 | 2.7 | 1.3 |
| Minnesota | 2.5 | 3.7 | 1.2 |
| Colorado | 2.1 | 3.2 | 1.1 |
| North Carolina | 1.3 | 2.2 | 0.9 |
| Ohio | 1.7 | 2.6 | 0.9 |
| Iowa | 3.8 | 4.5 | 0.7 |
| Pennsylvania | 0.9 | 1.6 | 0.7 |
| New York | 0.4 | 0.8 | 0.5 |
| Virginia | 0.7 | 1.2 | 0.5 |
| Georgia | 2.7 | 3.1 | 0.4 |
| South Carolina | 1.3 | 1.7 | 0.4 |
| Maryland | 0.3 | 0.6 | 0.3 |
| California | 0.4 | 0.6 | 0.2 |
| North Dakota | 1.9 | 2.2 | 0.2 |
| Arkansas | 2.8 | 2.9 | 0.1 |
| New Jersey | 0.2 | 0.3 | 0.1 |
| Alaska | 0.0 | 0.0 | 0.0 |
| Arizona | 0.4 | 0.4 | 0.0 |
| Connecticut | 0.2 | 0.2 | 0.0 |
| Delaware | 0.1 | 0.1 | 0.0 |
| Hawaii | 0.1 | 0.0 | 0.0 |
| Nevada | 0.1 | 0.1 | 0.0 |
| Oregon | 0.1 | 0.2 | 0.0 |
| Rhode Island | 0.0 | 0.0 | 0.0 |
| Washington | 0.1 | 0.2 | 0.0 |
| West Virginia | 0.2 | 0.3 | 0.0 |
| Idaho | 0.2 | 0.2 | -0.1 |
| Montana | 0.5 | 0.4 | -0.1 |
| Utah | 0.2 | 0.1 | -0.1 |
| Vermont | 0.2 | 0.0 | -0.1 |
| Wyoming | 0.9 | 0.8 | -0.1 |
| Maine | 0.4 | 0.1 | -0.2 |
| New Hampshire | 0.3 | 0.1 | -0.2 |
| Wisconsin | 2.5 | 2.2 | -0.3 |
| Florida | 3.9 | 3.6 | -0.4 |
| Massachusetts | 0.6 | 0.2 | -0.4 |
| Missouri | 4.5 | 4.0 | -0.5 |
| Indiana | 3.3 | 2.7 | -0.6 |
| Michigan | 1.7 | 1.1 | -0.6 |
| New Mexico | 1.3 | 0.8 | -0.6 |
| Nebraska | 5.0 | 3.5 | -1.5 |
| South Dakota | 3.1 | 1.6 | -1.5 |
| Oklahoma | 9.5 | 6.5 | -3.0 |
| Kansas | 8.7 | 5.0 | -3.7 |
| Texas | 15.4 | 8.9 | -6.6 |