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 ...

Each tornado touched down in Saturday's early hours, with the last and smallest observed at 5:14 a.m. An EF-1 ...

Live updates: 36 dead as storms head east; over 380,000 customers without power across East Coast, South and Midwest The ...

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

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

Storm damage has been reported across Alabama from severe weather on Saturday. Severe storms are being blamed for a t least ...

A deadly storm will push toward the East Coast on Sunday after days of destruction from 81 tornadoes, wildfires and dust ...

In a Facebook post Saturday afternoon, the Cedar Lake Fire Department said preliminary investigation suggests a EF0-EF1 ...

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

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