WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY
Timelapse footage of an almond-shaped lenticular cloud. Lenticular clouds form when air moves over mountains and is forced upwards, which sets up a standing wave downwind of the mountain. If the temperature at the crest of the wave is below the dew point, clouds will form. Filmed in the USA on a winter afternoon.
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