They are a cellular pattern of pouches hanging underneath the base of a  cloud. Composed primarily of ice, Mammatus Clouds can extend for  hundreds of miles in each direction. Mammatus clouds are often  harbingers of a coming storm or other extreme weather system.

They are a cellular pattern of pouches hanging underneath the base of a cloud. Composed primarily of ice, Mammatus Clouds can extend for hundreds of miles in each direction. Mammatus clouds are often harbingers of a coming storm or other extreme weather system.


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