![](http://www.alamy.com/thumbs/6/C02ABF38-6164-4E67-9EF9-CA86D9CA6A4B/DWMKF4.jpg)
Mammatus or mammatocumulus clouds form on the underside of thunderstorms, Oklahoma, United States of America, North America
Size: 6347px × 4386px
Photo credit: © Louise Murray / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: -, abstract, abundance, america, cloud, clouds, cloudscape, color, colour, day, destination, dramatic, form, frame, full, horizontal, image, mammatocumulus, mammatus, meteorology, nature, north, oklahoma, outdoors, overcast, sky, states, stormy, thunderstorm, travel, united, ¨Ümammatocumulus