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dust whirl[′dəst ‚wərl]
A rapidly rotating column of air over a dry and dusty or sandy area, carrying dust, leaves, and other light material picked up from the ground; when well developed, it is known as a dust devil. Also known as dancing dervish; dancing devil; desert devil; sand auger; sand devil.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Whirlwinds in which wind speeds are of of gale-force strength and in which surface dust is picked up and carried in dense columns of 5000 ft or more in height. They are formed as a result of the strong convection currents in the hot and dusty regions, such as deserts and other locations where the ground is very hot. Dust devils resemble tiny tornadoes, but they are caused by convective processes and produce significantly less damage than tornadoes. In many cases, they cause no damage of consequence. Also called a dust whirl or sand whirl.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved