3 adjectives to describe nube

A troublesome tempestuous air is as bad as impure, rough and foul weather, impetuous winds, cloudy dark days, as it is commonly with us, Coelum visu foedum, Polydore calls it a filthy sky, et in quo facile generantur nubes; as Tully's brother Quintus wrote to him in Rome, being then quaestor in Britain.

27): Quorum simul alba nautis stella refulsit, Defluit saxis agitatus humor, Concident venti, fugiuntque nubes, etc.

27): Quorum simul alba nautis stella refulsit, Defluit saxis agitatus humor, Concident venti, fugiuntque nubes, etc.

3 adjectives to describe  nube