- Cloud type, Cb: this Cumulonimbus cloud is a classic supercell
![Cloud type, Cb: this Cumulonimbus cloud is a classic supercell](http://www.skyartstock.com/peas/W940965S-SKYART.jpg)
- W940965S
- Cloud type, Cb: the sky darkens as a Cumulonimbus cloud spreads overhead. The storm is a CL classic supercell with a compact, rotating updraft (bowl-shaped base, lower left) feeding a steady stream of air into the southwest edge of the entire system. Low Fractus scraps, white against the dark, thick anvil, are carried by warm southeast winds into the tightly focused updraft.
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