The strength of the tornado that touched down in Harrisburg, Ill. An EF4 rating is the second strongest rating a tornado can get based on damage. The tornado, killing six, had winds up to 170 mph according to scientists.
The strength of the tornado that touched down in Harrisburg, Ill. An EF4 rating is the second strongest rating a tornado can get based on damage. The tornado, killing six, had winds up to 170 mph according to scientists.
