220.127.116.11. Cumulonimbus (calvus, capillatus, incus) – thunderstorms
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Cumulonimbus calvus is a form of Cumulonimbus cloud with a sharp, rounded, billowing top, still rising. It develops from Cumulus congestus. Cumulonimbus clouds, by definition, contain ice crystals – they are present in cumulonimbus calvus, but still in relatively small quantities.
Cumulonimbus calvus develops further into Cumulonimbus capillatus and can develop into Cumulonimbus capillatus incus (anvil-top).
- Cumulonimbus calvus produce lightning.
- They also produce hail.
- And severe straight line winds (downburst).
- Will develop into Cumulonimbus capillatus.
- Will develop into Cumulonimbus capillatus incus if the updraft is strong.