Whirlwind

A whirlwind
A dust devil at school ground
Whirlwind, 61 km northeast of Broome, Western Australia

A whirlwind is a phenomenon in which a vortex of wind (a vertically oriented rotating column of air) forms due to instabilities and turbulence created by heating and flow (current) gradients. Whirlwinds can vary in size and last from a few minutes to a few hours.

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