Discover Top Posts Tagged with #roll cloud

I thank my dear comrade and mutual for calling me out on posting this sort of degenerate trash on Tumblr. I will try to do better, inshallah.

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The Shores (2025)

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Although they may look sinister, roll clouds like this one are no tornado. These unusual clouds form near advancing cold fronts when downdrafts cause warm, moist air to rise, cool below the dew point, and condense into a cloud. (Image credit: M. Hanrahan; via APOD)

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Everything's gonna be alright.

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The morning glory over Cape St Vincent

Also known as roll clouds, no one knows exactly how they form, but these tubes can be thousands of kilometres long and (often but not always) appear in the early morning along coastlines. It is thought to be due to a circular air current pattern creating tube like zones of condensation when strong breezes blow inland off the sea. They are accompanied by turbulent winds and surface jumps in atmospheric pressure. We get them every now and again in my home city of Montevideo, forming along the length of the Rio de la Plata just offshore, sometimes in long perfect tubes, sometimes amazing ragged wind sheared formations. This one was shot off the coast of Portugal. Loz Image credit: Vanda Rita via APOD