WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY
Timelapse footage of a lifting fog bank below altocumulus castellanus clouds. The fog is indicative of stable air in the early morning, but castellanus clouds indicate instability in higher air, with rapid temperature changes with altitude. As such, they usually may give way to an active afternoon, often producing thunderstorms. Filmed in Colorado, USA, in summer.
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