A rotating "cloud" of dust or debris, near or on the ground, often appearing beneath a
condensation funnel and surrounding the base of a
tornado .
This term is similar to
dust whirl , although the latter typically refers to a circulation which contains dust but not necessarily any debris. A
dust plume , on the other hand, does not rotate. Note that a debris cloud appearing beneath a thunderstorm will confirm the presence of a tornado, even in the absence of a condensation funnel.
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