The Collaborative International Dictionary
Squall \Squall\ (skw[add]l), n. [Cf. Sw. sqval an impetuous running of water, sqvalregn a violent shower of rain, sqvala to stream, to gush.] A sudden and violent gust of wind often attended with rain or snow.
The gray skirts of a lifting squall.
--Tennyson.
Black squall, a squall attended with dark, heavy clouds.
Thick squall, a black squall accompanied by rain, hail,
sleet, or snow.
--Totten.
White squall, a squall which comes unexpectedly, without
being marked in its approach by the clouds.
--Totten.
Usage examples of "black squall".
So they got through those funerals as best they could, and meanwhile everything was getting darker, as on the corniche when a black squall approached from over the Hellespontus-Terran nations still sending up unauthorized people and landing them, the UN still threatening, China and Indonesia suddenly at each other's throats, Red ecoteurs blowing things up more and more indiscriminately, recklessly, killing people.
But we had hardly got her head round before the black squall hit us - Lord!
He saw a silent black squall which had eaten up already one-third of the sky.
Afore we was half a mile out, another black squall bore down on us -- solid sheets of water, and wind fit to blow the hair off your head.
Then a black squall bore down from the southeast, preceded by a fierce gust of wind.
So they got through those funerals as best they could, and meanwhile everything was getting darker, as on the corniche when a black squall approached from over the Hellespontus—.
He whipped round, and there in the west-north-west, directly to windward, emerging from a black squall with lurid light behind, he saw the Waakzaamheid, no hanging threat on the far horizon but hull up, not three miles away.