Dust Devils

Dust Devils - A small but rapidly rotating column of wind of short duration that is made visible by dust, sand, and debris picked up from the ground. Diameter usually ranges from 10 to 100 feet and develop best on clear, dry, hot afternoons.

Dust devils can be seen by the dust stirred up at ground level, swept up by the secondary flow and concentrated in a central location.

ash devils"Dust devils made visible by loose ash from the earth's surface that is picked up or entrained by the rotating column of air. For example, after the eruption of the Mount St.

Whirlwinds See Dust devils.
WHO World Health Organization.
Wind Air in motion relative to the earth's surface.

In general use the term cyclone is applied to any storm, especially violent, small-scale circulations such as tornados, waterspouts, and dust devils.

Dust devils probably rotate in either direction, but I have seen no reports. They all occur when convection is active.

Dust devils form in response to surface heating during fair, hot weather; they are most frequent in arid or semi-arid regions. Other names for dust devils include the 'willy-willy' and the 'cock-eyed bob'.

Dust Devil - A small atmospheric vortex not associated with a thunderstorm, which is made visible by a rotating cloud of dust or debris (dust whirl). Dust devils form in response to surface heating during fair, hot weather.

They may look like tornadoes, but dust devils are not formed by thunderstorms and do not drop from the sky. Dust devils are caused by swirling winds that rise with the warm air found over the ground.

Dust Devil- a rapidly rotating column of air carrying dust, leaves and other light-weight material; dust devils usually develop during hot, sunny days over dry and dusty or sandy areas.

Dust Devil - A small, rapidly rotating wind that is made visible by the dust, dirt or debris it picks up. Also called a whirlwind. Dust devils usually develop during hot, sunny days over dry and dusty or sandy areas.

CONVECTIVE VORTEX - Any vortex or rotating low-pressure region associated with rising air. This is a very general term, covering a category that tornadoes, dust devils, thermal lows, and tropical cyclones all fit into. Sometimes referred to as a CV.

Microscale - A small-sized event that is usually measured in meters and seconds to minutes; a cloud-sized phenomenon; e.g. turbulence, and dust devils.

Dust devil - A small but intense vortex made visible by dust or debris (dust whirl), which forms in response to surface heating during fair, hot weather. Dust devils are most frequent in arid or semi-arid regions.

Also called a low pressure system and the term used for a tropical cyclone in the Indian Ocean. Other phenomena with cyclonic flow may be referred to by this term, such as dust devils, tornadoes, and tropical and extratropical systems.

Temperatures can be scorching, and dust devils, whirling dust pillars raised by columns of rising hot air, are frequently seen. During October to November bushfires are fairly common - usually ignited by lightning from dry, gusty thunderstorms.

They represent cold air eddies and typically appear as small conical shaped protuberances, lasting from seconds to minutes. They are not terribly dangerous, but do contain winds of the same order as dust devils, ...

Dust devils. 64 Wind: Wind and vegtation. Destroys crops. 65 Wind: Wind Chill Index. 66 Wind: Wind Direction indicator: Weather Vane. 67 Wind: Wind Erosion of mountains/buildings/bridges. 68 Wind: Wind In Layers at various altitudes.

Since their origin is associated with cumuliform clouds, gustnadoes will be classified as Thunderstorm Wind events. Like dust devils, some stronger gustnadoes can cause damage.

Other phenomena with cyclonic flow may be referred to by this term, such as dust devils, tornadoes, and tropical and extratropical systems. The opposite of an anticyclone or a high pressure system.

See also: Dust, Wind, Air, Dust Devil, Water