0 a large, tall type of cumulus cloud that is often dark and brings heavy rain or a thunderstorm --
1 a large, tall type of cloud that is often dark and brings heavy rain --
Cumulonimbus clouds, commonly called thunderheads, can produce high winds, torrential rain, lightning, gust fronts, waterspouts, funnel clouds, and tornadoes.
Cumulonimbus can form alone, in clusters, or along cold front squall lines.
There were isolated cumulonimbus clouds with strong squalls and showers during approach and landing.
If enough moisture and upward motion is present, precipitation falls from convective clouds such as cumulonimbus and can organize into narrow rainbands.
A pyrocumulus which produces lightning is actually a type of cumulonimbus, a thundercloud, and is called pyrocumulonimbus.
That aircraft's captain contacted the tower and reported wind shear on final and cumulonimbus over the airport, a report audible to all incoming aircraft.
At the other extreme are the polar lows with extensive cumulonimbus clouds, which are often associated with cold pools in the mid- to upper-troposphere.
Although these weather phenomena are all related to cumulonimbus clouds, they form and develop under different conditions and geographic locations.
