"Mammatus clouds are most often associated with the anvil cloud and severe thunderstorms. They often extend from the base of a cumulonimbus, but may also be found under altocumulus, altostratus, stratocumulus, and cirrus clouds, as well as volcanic ash clouds. When occurring in cumulonimbus, mammatus are often indicative of a particularly strong storm or perhaps even a tornadic storm." woah! I have never seen these before.

MAMMATUS clouds are most often associated with the anvil cloud & severe thunderstorms. They often extend from the base of a cumulonimbus but may also be found under altocumulus, altostratus, stratocumulus, & cirrus clouds as well as volcanic ash clouds^

bluepueblo:    Ominous Storm, The Bermuda Triangle

♥ Ominous Storm, The Bermuda Triangle photo via besttravelphotos. Air Force wouldn't even fly over this Triangle.

Photo by Russ Matteo of the clouds before the Norfolk Nebraska hailstorm!

Norfolk Nebraska clouds before the storm. Norfolk Nebraska clouds before the storm. Norfolk Nebraska clouds before the storm.

There came a wind by Phil Koch

There Came a Wind (Wisconsin storm) by Phil~Koch. Green sky usually means perfect conditions for a tornado.

Whoa!

Darkening Skies, Ancona, Italy ♥ Feel Free To Like ✔ Tag ✔ Share ✔ Beautiful Nature And Amazing World

Storm behind the hill.

A stupendous black and white landscape photograph of a lone tree about to be enveloped by massive storm clouds. Image by Carlos Gotay.

Thunderhead behind a country church.

Stock Photo titled: Thunderhead Clouds Forming Behind A Country Church, unlicensed use prohibited

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CUMULONIMBUS INCUS at Mykonos, Greece - photo by Sfortis, via Wikipedia; a cumulonimbus cloud which has formed the characteristic flat, anvil-top shape. They can form into supercells resulting in severe storm phenomena such as tornadoes.

A Rainbow Cloud

The stunning image is of a rainbow cloud, captured above Mt Everest by Oleg Bartunov whilst on an expedition in the Himalayas, Nepal. The amazing rainbow effect is created when tiny ice crystals in the water vapour of the clouds reflect the sunlight.

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