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microburst
mi·cro·burst [ mkrō bùrst ] (plural mi·cro·bursts)


noun 
Definition:
 
strong downdraft: a strong localized air current that hits the ground and spreads, causing wind to rapidly change direction and speed
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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