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.

A whirlwind

A dust devil at school ground

Whirlwind, 61 km northeast of Broome, Western Australia

Other websites

• Fire whirlwind video September 11, 2012 Alice Springs Australia.
• Severe Storm Definitions & Whirlwind Classification Archived 2007-07-07 at the Wayback Machine (TORRO)
• Whirlwinds (TORRO)
• A 'hay devil' from National Geographic
• A longer version of the above but poorer quality