National Climatic Data Center Technical Report No. 99-02
1998–1999 Tornadoes and a Long-Term U.S. Tornado Climatology
Neal Lott, Sam McCown, Tom Ross
November 1999
Updated August 2000
U.S. Dept of Commerce
National Oceanic and Atmospheric Administration
National Environmental Satellite Data and Information Service
National Climatic Data Center
Asheville, NC 28801-5001
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