Tornado Alley is commonly used for the corridor-shaped region in the United States Midwest that sees the most tornado activity. While it is not an official designation, states most commonly included are Texas, Oklahoma, Kansas, Nebraska, Missouri, Iowa, and South Dakota.
While not geographically part of tornado alley, Florida sees more tornados than any other state, especially when accounting for how large the state is. In general, the southeast region of the U.S. sees frequent tornadoes.
The average tornado only stays on the ground for 5 minutes, and approximately 77% are considered between EF-0 and EF-1, with about 95% below EF-3. Only .01% of tornadoes reach the highest category of EF-5. Even so, they can cause many fatalities and significant property damage at any level.
According to National Geographic, tornadoes cause approximately 80 deaths and more than 1,500 injuries per year. Property damage caused by tornadoes is incredibly difficult to calculate, and as such, little current information about damages per state exists.
While determining how much individual property damage tornadoes cause each year is difficult, it's estimated that tornadoes caused about $3.108 billion in damages in 2019.
The best information available on a per-state basis is 25 years old. The data can be extrapolated over the last two decades as tornado occurrences have increased. DEFINITION: Total cost of damage from tornadoes during 1950 to 1994, in adjusted U.S. dollars.