The Enhanced Fujita Scale provides an estimated range of a tornado's wind speeds, based on the tornado's damage.

One question you may ask yourself is how tornadoes are measured? It's with the Enhanced Fujita (EF) scale which is gives a ...

The National Weather Service (NWS) on Saturday confirmed at least 3 EF-2 Tornadoes touched down in southern Indiana.

A dangerous tornado outbreak featuring the potential for "multiple violent" tornadoes threatens much of the Deep South ...

Researches found little evidence that tornadoes were getting weaker. Instead, it appears that a subjective tornado grading system is to blame.

The National Weather Service has confirmed at least four tornado touchdowns occurred in the Chicago area during a severe weather outbreak Friday.

Large and destructive tornadoes are carving paths of destruction across the South for the second day in a row.

The original Fujita scale, developed in the 1970s, was used until 2007, when it was updated and replaced by what is now known as the Enhanced Fujita (EF) scale. The numerical ratings of tornadoes were ...

A quirky aspect of the way we measure twisters helps explain why there hasn't been a top-tier-rated tornado in 12 years.

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 ...