- Cloud types: tropical downpour from airmass Cumulonimbus storm cloud
![Cloud types: tropical downpour from airmass Cumulonimbus storm cloud](http://www.skyartstock.com/peas/W887936Z-SKYART.jpg)
- W887936Z
- Cloud types, Cb: a tropical downpour is on the way as a Cumulonimbus cloud approaches. The airmass thunderstorm is propagating to the right, as cooler outflow air from the rain area pushes into warm, humid air on that side of the storm.
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