- Cloud types, Cb: a black storm cloud in clear blue sky
- W000324Z
- Cloud types, Cb: this scene is filled with stark contrasts as a black and white storm cloud invades a completely clear blue sky over green fields. Although this Cumulonimbus cloud appears as one entity, it is composed of several merged cells, each having developed beside an older cell by propagation along outflow moving north, to the left.
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