The United States has been more prone to tornado damage than any other country on earth.
The United States has been more prone to tornado damage than any other country on earth. In fact, tornadoes occur throughout the United States at the rate of nearly 800 a year.
Now, the National Aeronautics and Space Administration has commissioned research into the phenomenon at the University of Chicago in which scientists hope to discover what causes the devastating funnels, and eventually to learn how to spot them from weather satellites.
As part of the study, University research workers keep a close watch on weather patterns over the United States. They will fly to within twenty miles of a weather front to take photographs for later analysis and comparison.
In the laboratory, a machine is used to simulate the thunderstorm-producing "twisters".
A tornado consists of a violent rotating current of air, sometimes reaching speeds of up to 300 miles an hour. The damage it causes is erratic. It can destroy one house, while leaving the house next door untouched.