When a tornado hits, it later is assigned a number on the Enhanced Fujita scale, ranging from EF-0 (65 mph to 85 mph) to EF-5 (winds over 200 mph), per the NWS.

The couple chased an EF-5 tornado on May 22, 2011 that turned out to be the deadliest in a lifetime. ... Sean Wilson said the Joplin tornado aftermath was akin to a war zone.

Out of the 22 F5 or EF-5 tornadoes recorded since 1980, the average size of these devastating storms came out to around 1,100 metres in width. The tornado that struck Elie?

The Enhanced Fujita Scale, which came into use on Feb. 1, 2007, assigns tornadoes a rating based on wind speeds estimated off ...