Heavy clouds before the storm. (Norfolk, Nebraska)

Stunning and Shocking Thunderstorm Photography

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

Lenticular clouds, Grytviken, South Georgia Island.

mammatus cloud Nebraska by brettnickeson

Rare Bubble Clouds

This is a rare meteorological phenomenon called a skypunch. When people see these, they think it's the end of the world. Ice crystals form above the high-altitude cirro-cumulo-stratus clouds, then fall downward, punching a hole in the cloud cover. Freakishly weird!

awesome clouds

Angel clouds

♂ Solitude nature light ray from the dark cloud...would love to have been the one taking this shot- very spiritual...."The Power of Him" by Carlos Gotay

Mjolnir cloud

My dad taught me about these when I was a child. From previous pinner: Not every cloud has a silver lining; this multi-coloured cloud looks as if a rainbow has formed high in the heavens. The phenomenom - called a sundog - happens when ice crystals appear in clouds and refract the sun's rays. Photographer Robert Arn captured the cloud in Heyworth, Illinois, America. Picture: Robert Arn/solent

"Storm behind the hill."

storm clouds

Storm

Terrifying cloud August 4 2011 tkcollier.wordpress...quite spectacular