File:Kelvin Helmholz wave clouds.jpg

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Description	Kelvin Helmholtz instability clouds in San Francisco.These clouds, sometimes called "billow clouds," are produced by instability, when horizontal layers of air brush by one another at different velocities. A better name might be van Gogh clouds: It is widely believed that these waves in the sky inspired the swirls in van Gogh's masterpiece Starry Night
Date	2006
Source	Own work
Author	Brocken Inaglory

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