The chart on the left shows that most tornadoes are weak, either
F0 or F1. Only 1% of all tornadoes fall into the violent
F4-F5 category, but they account for 67% of all tornado-related deaths.
Conversely, the 74% of tornadoes that are weak F0-F1 account for only 4%
of tornado-related deaths. Tornadoes as a whole are very infrequent, but
deadly tornadoes are even more infrequent.
Last modified May 17, 2007 by Jennifer Bergman.
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