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

The batch of tornados that cut across the Southwest over the weekend destroyed homes in an Arkansas community that also faced ...

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

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

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

The National Weather Service in St. Louis has confirmed three tornadoes hit the St. Louis area during Friday's storms, ...

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

In terms of strength of tornadoes, we're looking at some brief spin-up tornadoes, but an EF2 can't be ruled out for Friday ...

The National Weather Service on Saturday confirmed at least three EF-2 tornadoes touched down in southern Indiana.