WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY
Timelapse footage of a mountain banner cloud, showing that the sharp edge to the cloud does not move in the wind. This formation occurs as air is lifted as it passes a mountain range, causing the formation of standing waves in the lee of the mountains. Where the wave crests are above the dew point in the atmosphere, clouds form. Filmed in the USA.
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