Lenticular Clouds Above Washington (APOD PIC)

Are those UFOs near that mountain? No — they are multilayered lenticular clouds. Moist air forced to flow upward around mountain tops can create lenticular clouds. Water droplets condense from moist air cooled below the dew point, and clouds are opaque groups of water droplets. Waves in the air that would normally be seen horizontally …..

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