Dust devils are rotating columns of wind that form when the sun unevenly heats the ground, creating an unstable environment that causes air to rise.
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The rapidly rising air creates an area of low pressure, which causes air to rush in to fill the void. The updraft may begin to rotate as it vertically stretches, moving the mass closer to the axis of rotation and intensifying the spinning. The free 12News+ app from 12News lets users stream live events — including daily newscasts like"Today in AZ" and"12 News" and our daily lifestyle program,"Arizona Midday"—on
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