But not as annoying as the tedious, predictable blowhards who clearly feel their calling in life is to channel the spirit
of cumulonimbus clouds, for yea, do they love to rain upon every parade.
Vertical mixing in the atmosphere is dominated by energetic mixtures
in cumulonimbus clouds of two basic provenances: local convective instability, or baroclinic instability with convective instability at the frontal boundary.
The warm water evaporates from the ocean surface, and the light, warm and humid air rises, leading to deep convection in the form of
towering cumulonimbus clouds and heavy precipitation.
Textbook cumulonimbus - formed summer thunderstorms are fairly rare [25] in Los Angeles, because the atmosphere over the coastal basin is generally too stable and dry, especially during summer, to allow the strong vertical development necessary for
mature cumulonimbus clouds.
This electrification is particularly large in
cumulonimbus clouds as a result of vigorous vertical mixing and collisions.
Changes in ocean surface temperatures caused by El Niño significantly affect
where cumulonimbus clouds form in the ITCZ and, therefore, the geographic structure of the Hadley cell.
The ITCZ corresponds to the equatorial trough and is the mechanism that helps generate the
deep cumulonimbus clouds through convection.
In
cumulonimbus clouds during conditions where graupels are repeatedly wetted and then injected back toward high altitudes by strong updrafts, very large graupels called hail result.
The upward trajectory of the air gives shape to the
towering cumulonimbus clouds, and if the air is heavily laden with water vapor, it adds mass to the clouds, as well.
Often, these processes lead to an almost daily development of convective thunderstorms by providing moisture and heat for the development
of cumulonimbus clouds.
As the storm moves, a «blob» of cold air builds, particularly in the upper reaches of the towering
cumulonimbus clouds that march along at the storm's front.
The intertropical convergence zone is distinguished by a wide band of cumulus and
cumulonimbus clouds that are created by dynamic atmospheric lifting due to convergence and convection.
The anvils of
cumulonimbus clouds are composed predominantly of ice crystals.