Whirlwind

A whirlwind is a vortex of wind (a straight rotating column of air) that forms because of turbulence created by heating and flow (current) differences.  Whirlwinds happen all over the world and in any season.

 Other websites 

 Fire whirlwind video September 11, 2012 Alice Springs Australia.
 Severe Storm Definitions & Whirlwind Classification  (TORRO)
 Whirlwinds (TORRO)
 A 'hay devil' from National Geographic
 A longer version of the above but poorer quality

Category:Weather