Cumulonimbus Pileus Cloud
Pileus clouds are fine and transient layers of condensed water vapour that appear as thin caps atop of towering cumulus clouds. They form through the lifting of moist air layers by strong convective updrafts and often indicate the transition into a cumulonimbus cloud that is capable to produce severe weather.
Submitted on 15 February 2019
Credit: Bastian Kirsch (distributed via imaggeo.egu.eu)
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