![](http://www.alamy.com/thumbs/6/16E943E1-F7E6-478E-900C-BEE69F1ED0AA/TBTF8M.jpg)
Mammatus Clouds Cumulonimbus. Clouds Mammatus are a grouping of clouds, which usually indicate the imminence of a storm.
Size: 8250px × 2856px
Photo credit: © Orazio Puccio / Alamy / Afripics
License: Royalty Free
Model Released: No
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