Stratus clouds are low grey clouds which bring a drizzle.
Stratus clouds may sometimes produce snow or rain.
it is a storm is coming
light mist or drizzle
stratus, stratocumulus, and nimbostratus clouds
Cirrus clouds bring fair weather which is good for being out doors.
Stratocumulus clouds can bring fair weather and rain.
it brings in fair weather
the weather that cumulonimbus brings is thunderstorms
Nimbus clouds generallly bring thunders and showers.