Vortex Too: Dust Devil Near Tucson AZ

May 18 2009.  Strong dust devil on Tucson’s southern periphery.  Not too uncommon this time of year.

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Just after this photo the base grew darker.  It is beginning to in this photo.  This was about a mile away.  Photo taken while traveling 65 mph.  Not much blurring considering this pic is blown up.

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