The Enhanced Fujita or EF Scale is the system meteorologists use to estimate tornado strength by examining the damage it ...

National Weather Service surveys city following severe storms ...

Meteorologists rate storms on the Enhanced Fujita scale using damage indicators such as homes, trees and other structures.

Tornadoes are among the most powerful atmospheric phenomena on Earth, capable of transforming calm skies into destructive ...

A deadly tornado that tore across southeastern North Dakota this summer has been upgraded to an EF5 with winds topping 200 mph (322 kph), the strongest classification of tornado and the first ...

A tornado that caused widespread damage west of Knox Tuesday night was officially rated an EF-2 by the National Weather Service after storm survey teams assessed the destruction across the area.

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Learn the difference between a severe weather watch and warning as well as a tornado watch vs. warning as a storm nears ...