STEPHEN BURT / SCIENCE PHOTO LIBRARY STEPHEN BURT / SCIENCE PHOTO LIBRARY
Timelapse of clouds forming, dissipating and moving across the sky at sunset during a frontal clearance event in the late afternoon. This phenomenon is where waves of clouds form on a weather front boundary between air masses of different densities and temperatures. This example is seen in winter, over trees in Berkshire, UK. Filmed from 15:30 to 16:15 (45 minutes) on 31 December 2017.
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