white squall

noun Nautical.
  1. a whirlwind at sea or a violent disturbance of small radius not accompanied by clouds but indicated merely by whitecaps and turbulent water.
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British Dictionary definitions for white squall

white squall

noun
  1. a violent highly localized weather disturbance at sea, in which the surface of the water is whipped to a white spray by the winds
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012