downburst

[doun-burst]

down·burst

[doun-burst]
noun
a strong downward current of air from a cumulonimbus cloud, often associated with intense thunderstorms.

Origin:
down1 + burst
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Downburst is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Collins
World English Dictionary
downburst (ˈdaʊnˌbɜːst)
 
n
Also called: microburst a very high-speed downward movement of turbulent air in a limited area for a short time. Near the ground it spreads out from its centre with high horizontal velocities

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Science Dictionary
downburst   (doun'bûrst')  Pronunciation Key 
An extremely powerful downward air current from a cumulonimbus cloud, typically associated with thunderstorm activity. Downbursts can produce effects that resemble those brought about by tornadoes.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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