Lenticular Clouds

Lenticular Clouds Over Mt. Rainier - Moist air forced to flow upward around mountain tops can create multilayered & u.f.o. shaped 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 can then be seen vertically, by the different levels where clouds form. — at lmage Credit: Tim Thompson/NASA (Seattle, Washington, USA - Dec. '08).