But what are EF5 tornadoes, and are they different from their F5 counterparts? Here are all the available details regarding the nomenclature of the chaotic natural phenomena. Simply put ...

A wide-reaching storm hitting the Ohio Valley, mid-Atlantic and Northeast Thursday is just the first in a nearly nonstop ...

but not all supercells produce tornadoes. Damage from the 1999 F5 tornado that struck Moore, Oklahoma. Photo courtesy NOAA. Dr. T. Theodore Fujita developed the Fujita Tornado Damage Scale (F ...

initially rated the storm an F6 before it was reclassified as an F5. That scale would later become adopted nationwide as the benchmark for tornadoes.

The National Weather Service said another tornado touched down in Fentress County at around 7:53 p.m. Eastern Time Thursday night.

In 1997, the last F5 tornado to hit the entire state of Texas ... flooding, and he even chased tornadoes! From Lubbock, Mark moved back to his hometown of Austin at KXAN News.