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Spin-up - [Slang], a small-scale vortex initiation, such as what may be seen when a gustnado, landspout, or suction vortex forms.
SPIN-UP
A small-scale vortex initiation, such as what may be seen when a gustnado, landspout, or suction vortex forms.
The anatomy of a microburst shows that the highest wind speeds occur shortly after the cold air has impinged upon the ground. The spin-up of the microburst curl then results in an acceleration of wind velocities about the curl.
Though the word gustnado sounds a bit like Texmex food it truly is a quite common feature associated to thunderstorm gust fronts. Gustnadoes, short for gust-front tornadoes, are small, weak and short lived spin-ups typically occurring on the ...
cumulus clouds (often as no more than a dust whirl), and essentially are the land-based equivalents of waterspouts.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: AOPA, Gustnado, ROTG, SPCLY, Spin-Up, ...
 See also: Wind Speed, Wind, Air, Tornado, Thunderstorm
  
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