While blaw is the usual in west and central Scotland, blaa will be heard more in the east. The northeast is often the home of distinctive forms and there you might hear or read blyave or blyauve, as in the Aberdeen Weekly Journal (14 March 1929): “Tho’ we hid some bits o’ storms an’ some blyauvin’, we hinna hid a storm at lay as lang as that did”.
A gandaguster or gandiegow is a strong, sudden gust or a storm of short duration. You can almost feel the wind buffet and swirl in the word.
Flaw, a blast or squall of wind, is used by Walter Scott in The Antiquary (1816): “Skirling like an auld skart (cormorant) before a flaw o’ weather”.
Rather more specialised…