Tornadoes are among the most devastating and awesome local storms that occur in the world.
The United States has the dubious distinction of having the greatest frequency and the most severe tornadoes. They have the power to lift railroad cars and sail them many yards through the air. The power of their winds can make deadly missles of loose objects, including broken glass. Even pieces of straw have been found imbedded in trees and boards after a tornado. This seasonal drift is principally caused by the increase of warm, gulf moisture into the central part of the country during spring and summer, decreasing during the fall and winter.