Pyrocumulus cloud

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  Cumulonimbus calvus

  Cumulonimbus calvus is a moderately tall cumulonimbus cloud which is capable of precipitation, but has not yet reached the height where it forms into a cumulonimbus capillatus (fibrous-top) or cumulonimbus incus (anvil-top). Cumulonimbus calvus develops from cumulus congestus, and its further...
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  Cumulus congestus

  Cumulus congestus clouds (also towering cumulus) are characteristic of unstable areas of the atmosphere which are undergoing convection. They are often characterized by sharp outlines and great vertical development. Because cumulus congestus is produced by strong updrafts, it is typically taller...
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  Cumulus

  Cumulus clouds are a type of cloud with noticeable vertical development and clearly defined edges. Cumulus means "heap" or "pile" in Latin. They are often described as "puffy" or "cotton-like" in appearance. Cumulus clouds may appear alone, in lines, or in clusters. Cumulus clouds are often...
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  Mammatus

  Mammatus, also known as mammatocumulus, meaning "Mammary cloud" or "Breast cloud" is a meteorological term applied to a cellular pattern of pouches hanging underneath the base of a cloud. The name "mammatus" is derived from the Latin mamma (udder or breast), due to the clouds' characteristic shape...

• Cumulonimbus incus

  A cumulonimbus incus (Latin incus, "anvil") is a cumulonimbus cloud which has reached the level of stratospheric stability and has formed the characteristic flat, anvil-top shape. It can cause a supercell and then a tornado. A cumulonimbus incus is a sub-form of cumulonimbus capillatus.