Even on the Enhanced F-scale , there is no such thing as ``F6 ' Moreover , a tornado is classified as significant if it does F2 or greater damage on the Enhanced F scale . Of course , no tornado is essentially unimportant . Any tornado can kill or cause damage . In fact , some tornadoes rated less than F2 probably could do F2 or even greater damage if they hit a well-built house during peak intensity (Tobin 1997 . However , the original F-scale will no longer be...











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