Mammatus clouds are pouch-like protrusions hanging from the undersides of clouds. Composed primarily of ice, these cloud pouches can extend hundreds of miles in any direction.
People associate them with severe weather, and it’s true they can appear around, before or after a storm. Mammatus clouds can appear ominous, but contrary to myth, they don’t continue extending downward to form tornadoes.
Wow! Amazing images captured by a storm chaser.
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