The majority of tornadoes occur in agricultural areas. Tornadoes need moisture to feed their parent thunderstorms and the instability associated with spring and summer warming. Crops need moisture to grow and the temperature variation associated with changing seasons. Both conditions for tornadoes and agricultural growth are found in the same areas, as is shown on this map. (Courtesy of Dr. T. T. Fujita, University of Chicago)

Last modified prior to September, 2000 by the Windows Team

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