Stratus clouds also form when a layer of air is cooled from below to its dewpoint temperature and water vapor condenses into liquid droplets.
(Stratus clouds; form; T:when a layer of air is cooled from below to its dewpoint temperature and water vapor condenses into liquid droplets) (a layer of air; is cooled; )
Stratus clouds a layer of air
form is cooled
T:when a layer of air is cooled from below to its dewpoint temperature and water vapor condenses into liquid droplets