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arched squall

American  
[ahrcht skwawl] / ˈɑrtʃt ˈskwɔl /

noun

Meteorology.

  1. a potentially violent squall in which storm clouds appear as a well-developed arch rising above the horizon.

    The afternoon’s calm at sea had been ushered in by a treacherous arched squall, which had us scrambling to our sails in a hurry.

Etymology

Origin of arched squall

First recorded in 1810–15

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.