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Cloud Formations


Cumulonimbus is a heavy and dense cloud of considerable vertical level in the kind of a mountain or substantial tower, often linked with hefty precipitation, lightning and also thunder. The tires Cumulonimbus cloud has actually a distinctive flat, anvil shame top.

You are watching: An anvil-shaped top is most often associated with


The Cumulonimbus cloud (Cb) develops when three conditions are met:

There should be a deep class of turbulent air.The air have to be warm and also moist.A cause mechanism must cause the warmth moist air come rise:Heating that the great of waiting close come the surface.Rising ground forcing the waiting upwards (orographic uplift).A former forcing the waiting upwards.

The means in which a Cb develops is covered in a separate article: Lifecycle of the Thunderstorm.


Cumulonimbus cloud in main Oklahoma. The updraft is the big cloud mass at the facility of the photo. The anvil is the level layer in ~ the top. The downdraft is the rainy area come the right.

Types that Cumulonimbus

Mass Ascent
. Caused when a weather front pressures the waiting upwards. Similar to orographic lift, the Cb cells kind in a line follow me the front, frequently embedded within wider frontal cloud, because of this presenting a an obstacle to plane trying come navigate v the front.



Flight into a Cb is very dangerous. The only cautious defence versus the hazards linked with a Cb is because of this to stop flying into one in the an initial place.

Awareness. Awareness that the problems which cause the development of a Cb, recognition of a developing and also mature Cb, and also awareness of the indicators which show the proximity that a Cb will help controllers and also flight crews to plan operations to prevent the connected hazards.

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If the Cb cell is situated over the location aerodrome, climate the pilot would be well advised to organize off or draw away rather 보다 attempt a landing.