Dr. Fujita's original scale, which ranges from F0 to F5, is based upon the type and severity of damage the tornado produced.

The Enhanced Fujita Scale or EF Scale, became operational on February 1, 2007. An EF 0 tornado is minor with winds of 65 to 86 miles an hour. Power outages, damage to gutters and siding ...

Severe weather swept across portions of Oklahoma late Saturday night and early Sunday morning, leaving behind widespread ...

Storm survey teams have been sent out to inspect damage to determine the exact number of tornadoes, as well as their rating on the Enhanced Fujita Scale. The NWS said it started those surveys in ...