WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY
Timelapse footage of unusual mountain wave clouds. The prominent bar of cloud across centre marks the crest of a standing wave, set up as air is blown over the mountains. It is unusual that such clouds have the visible shedding of cloud parcels seen here, though. Filmed in Colorado, USA, in autumn.
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