MOLINE, Ill. — A new study published by the American Meteorological Society has shed light on a puzzling phenomenon: The United States has not logged an EF5 tornado, the most violent category ...

So far, they've found that the tornado spanned 1.3 miles -- the length of more than 22 football fields lined up end-to-end -- carving a 17-mile path of destruction.

(A tornado is considered EF1 on the Enhanced Fujita Scale if its wind gusts are estimated at 86-110 mph, based on the amount ...

Just four Ohio tornadoes since 1950 have received the most severe EF5 designation. The last time was May 31, 1985, when an EF5 tornado that tore through parts of Portage and Trumbull counties ...