Tornadoes occur throughout the world, including India and Bangladesh, they are most intense and devastating in the United States. Tornadoes can strike at any time of day, but are much more frequent in the afternoon and evening,

after the heat of the day has produced the hot air that powers a "tornadic thunderstorm" -- a t-storm that produces a tornado.

Tornadoes are most common in "Tornado Alley," particularly in spring and summer. Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Louisiana, Mississippi, Missouri, South Dakota also have many tornadoes. Courtesy: NOAA  read more