- Cloud types, Cb: a typical, isolated Cumulonimbus cloud
![Cloud types, Cb: a typical, isolated Cumulonimbus cloud](http://www.skyartstock.com/peas/W004732Z-SKYART.jpg)
- W004732Z
- Cloud types, Cb: a typical, isolated Cumulonimbus cloud with dark base and bright, boiling mass which extends high into the atmosphere. The storm cloud is young, with a crown that has not yet flattened out as an anvil. This is partly because new growth is on this side of older growth (forward propagation) and the brighter, newer towers obscure previous anvil parts.
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