One way to hold this word: something bursts out all at once, loud and rough, and then it is over. A baby fills a room with noise; ten minutes of wind and rain crosses a bay. Same shape, different material.
From the word’s history
From Old Norse skvala, 'to cry out', with the noun probably coming from the verb; the Swedish cognate skvala means 'to gush, pour down'. The sound and the weather are one line, not two.
資料上寫的是：來自古北歐語 skvala（大聲叫喊），名詞大概是從動詞來的；同源的瑞典語 skvala 則是「傾瀉、嘩啦啦地流」。所以「大聲喊」跟「嘩啦啦倒下來」在這個字裡本來就是同一條線，不是後來硬湊的比喻。
Packet Wiktionary etymology for 'squall' (source_ref kaikki:3f6f69a190036ae4:1004416661:8073): 'From Middle English *squalen and squelen... from Old Norse skvala ("to cry out")... Cognate with Swedish skvala ("to gush, pour down"). The noun is probably from the verb.'
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