![](http://www.alamy.com/thumbs/6/282BD877-FE08-4150-95DB-70B8FAD4A57D/2M6JMYP.jpg)
Mammatus clouds sky background
Size: 4245px × 2830px
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Photo credit: © Zoonar/Kokhanchikov / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: abstract, atmosphere, atmospheric, background, bags, bleak, climate, cloud, clouds, cloudscape, cloudy, cumulonimbus, cumulus, dark, day, dramatic, dusk, fluffy, formation, gray, grey, horizontal, humid, mammatocumulus, mammatus, meteorology, nature, ominous, outdoor, overcast, pattern, rain, rare, scenic, sky, storm, thunderstorm, weather, wind