The one true reference work is Significant Tornadoes 1680-1991/a Chronology and Analysis of Events, Thomas P. Grazulis (Author).
http://www.tornadoproject.com/
The one true reference work is Significant Tornadoes 1680-1991/a Chronology and Analysis of Events, Thomas P. Grazulis (Author).
http://www.tornadoproject.com/
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