arched squall

[ ahrcht-skwawl ]
/ ˈɑrtʃt ˈskwɔl /

noun Meteorology.

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.

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Origin of arched squall

First recorded in1810–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021