Thunderhead Cloud or a Cumulonimbus cloud. The color is caused by the rays of the sun shining into the cloud. Amazing picture by Karen Titchener

Whatever kind of cloud this is...it is interesting and pretty...so I pinned it.

An amazing photo of a large shelf cloud off the coast of Montevideo, Uruguay. A shelf cloud is a low, horizontal, wedge-shaped Arcus cloud.

Massive Storm Cloud

Cloud appeared over Grant’s Mill in B’ham, Alabama, April 2012 - Most Amazing Photography

Very unusual sky… Called an ice halo, a larger version of sundogs that form when there are a large amount of ice crystals suspended high in the atmosphere

Very unusual sky…

Funny pictures about Unusual Sky. Oh, and cool pics about Unusual Sky. Also, Unusual Sky photos.

Kelv-Helmz is short for the Kelvin–Helmholtz instability (after Lord Kelvin and Hermann von Helmholtz). These tremendous cloud formations are the result of shearing winds up at the cloud level.

14 Gorgeous Kelv-Helmz Cloud Formations

Cirrus Kelvin-Helmholtz clouds - These slim, horizontal spirals tend to dissipate quickly after their initial formation making observation difficult.

A "Skypunch" in Switzerland. this rare phenomenon occurs when ice crystal form  above the cloud and fall down

A "Skypunch" in Switzerland -- Rare phenomenon occurring when ice crystals form above the clouds fall downward _____________________________ Reposted by Dr.

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Lightning illuminates a cumulonimbus cloud over Corio Bay, Victoria, Australia, by James Collier / stunning nature photography

Fire rainbows are the rarest of all naturally occurring atmospheric phenomena. For a fire rainbow to occur, cirrus clouds must be 20,000 feet in the air with the precise amount of ice crystals, and the sun must hit the clouds at 58 degrees.

Fire rainbows are the rarest of all naturally occurring atmospheric phenomena. For a fire rainbow to occur, cirrus clouds must be feet in the air with the precise amount of ice crystals, and the sun must hit the clouds at 58 degrees. (a/k/a Sun Doggies)

white northern lights seen from Finland

culturenlifestyle: “ Rare White Curtain Auroras Seen Over Finland Behold stargazers, this is not an art installation. These are actually stunning white Northern Lights in Finland. The stunning Aurora Borealis resemble a white curtain, which seems to.

Natuur / Nature

Funny pictures about Waterspout in Italy. Oh, and cool pics about Waterspout in Italy. Also, Waterspout in Italy photos.

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