Lenticular Clouds - Windows to the Universe
https://www.windows2universe.org/earth/Atmosphere/clouds/lenticular.html
WebLenticular, or lee wave, clouds form downwind of an obstacle in the path of a strong air current. In the Boulder, Colorado, area, the obstacle is the Front Range of the Rocky Mountains, seen through clouds at the bottom of the picture. Click on image for full size Courtesy of UCAR Digital Image Library. Clouds. Cloud Types. Cloud Image Gallery.
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