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Cloud chart showing major tropospheric cloud types identified by standard two-letter abbreviations and grouped by altitude and form. See table below for full names and classification. The table that follows is very broad in scope much like the cloud genera template near the bottom of the article and upon which this table is partly based.
Cumulonimbus (from Latin cumulus 'swell' and nimbus 'cloud') is a dense, towering, vertical cloud, [1] typically forming from water vapor condensing in the lower troposphere that builds upward carried by powerful buoyant air currents.
Visibility is at least 10 kilometres and no clouds below 5000 feet with no forecasted significant weather change such as precipitation. CAVU Ceiling and Visibility Unlimited CAW continuing airworthiness CB Cumulonimbus cloud: CBT computer-based training CCRs closed circuit mixed gas rebreathers CCRs constant current regulators CDA
A cumulonimbus capillatus is a cumulonimbus cloud with dense cirrus clouds above it, making the cloud top appear to contain hair-like structures. The name comes from the Latin word capillatus, meaning "with hair". [1] It is an intermediate stage between cumulonimbus calvus and cumulonimbus incus.
Landspout; Cumulonimbus calvus clouds can, on rare occasions, produce a unique type of tornado known as a landspout. Landspouts are formed when strong ground level rotation is caught in the updraft of the storm, pulling it upwards and connecting it to the clouds above resulting in the rotation becoming a true tornado.
Also actiniform. Describing a collection of low-lying, radially structured clouds with distinct shapes (resembling leaves or wheels in satellite imagery), and typically organized in extensive mesoscale fields over marine environments. They are closely related to and sometimes considered a variant of stratocumulus clouds. actinometer A scientific instrument used to measure the heating power of ...
Abbreviation Description Genera Calvus: cal: Tops of clouds lose hard, rough appearance and become smooth: Cb: Capillatus: cap: Tops of clouds become distinctly fibrous or striated. Cirrus clouds are often in appearance: Cb Castellanus: cas: Distinct turrets rising from a large base or line of cloud: Sc, Ac, Cc: Congestus: con
A cumulonimbus incus (from Latin incus 'anvil'), also called an anvil cloud, is a cumulonimbus cloud that has reached the level of stratospheric stability and has formed the characteristic flat, anvil-shaped top. [1] It signifies a thunderstorm in its mature stage, succeeding the cumulonimbus calvus stage. [2]