Cumulus clouds become Cumulonimbus (dark towering clouds) when enough water vapor condenses in the same spot.
Clouds appear dark before a storm because they become thicker and higher, blocking more sunlight from passing through. This creates a shadow effect and gives the appearance of dark clouds. Additionally, the moisture content in the clouds increases as a storm approaches, which can make them appear darker.
Dark rain Clouds are clouds that are black when it rains
When more water dropplets gather and clump together ready to fall (rain).
cirrus clouds are dark and usally bring rain
"dark billowing clouds" isn't a sentence. Dark and billowing are adjectives describing clouds, a plural noun.
Dark Clouds - song - was created in 1997-02.
What word describes low dark clouds
rain clouds
Dark Clouds in a Perfect Sky was created in 2004-10.
If stratus clouds are dark, they are often referred to as nimbostratus clouds. These clouds are thick and capable of producing continuous precipitation, such as rain or snow.
cuz in clouds, once enough precipitation forms and clouds become heavy and dark, rain, and snow could form depending on the season, and lightning can occur from the clouds causing thunder.