The National Weather Service said Saturday it was investigating the possibility that a second tornado touched down in South ...

Instead, after a tornado hits, the U.S. National Weather Service uses a rating system it adopted in 1973 called the Fujita Scale. Devised by meteorologist Theodore Fujita in 1970, the F-scale ...

They happened in different years, but residents in two major Texas cities were digging out in disbelief on this date from two ...

Its destruction was so extreme that Tetsuya Theodore Fujita, the University of Chicago professor who developed the tornado intensity scale, gave it one of only two experimental F6 ratings ever ...