TOM A WARNER / WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY TOM A WARNER / WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY
Timelapse footage of the passage of a cold front at night. Lightning on the horizon marks atmospheric instability. The cold air moves beneath the warmer air, lifting it and causing cloud and rain. With the passage of the front the winds swing round to blow from the north. Filmed in South Dakota, USA, in spring.
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