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Cumulonimbus incus

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Cumulonimbus incus
Cumulonimbus capillatus incus
AbbreviationCb inc.
GenusCumulonimbus (heap, cloud/severe rain)
SpeciesIncus (anvil)
ClassificationFamily D (Vertically developed)
AppearanceLarge flat-top cloud
PrecipitationYes, often intense

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.

Hazards

A cumulonimbus incus is a mature thunderstorm cloud and can produce many dangerous elements.

  • Lightning; this storm cloud is capable of producing bursts of cloud to ground lightning.
  • Hail; small hail balls may fall from this cloud.
  • Heavy rain; the cloud may drop several inches of rain in a short amount of time. This could cause flash flooding
  • Strong wind; gale force winds from a downburst may occur under this cloud.