Lenticular Cloud Photos Lake Gregory Sunset Picture
by Lee Reeder

Lenticular cloud photo at sunset over Lake Gregory, taken February 18, 2007. This cloud formation loomed over Crestline for several hours. Sometimes called “spaceship clouds” because they have a flying saucer shape when viewed head on, lenticular clouds are stationary, lens-shaped clouds that form at high altitudes, normally aligned at right-angles to the wind direction. Where stable moist air flows over a mountain or a range of mountains, a series of large-scale standing waves may form on the downwind side. If the temperature at the crest of the wave drops to or below the dewpoint, moisture in the air may condense to form lenticular clouds. As the moist air moves back down into the trough of the wave, the cloud may evaporate back into vapor. Under certain conditions, long strings of lenticular clouds can form near the crest of each successive wave, creating a formation known as a 'wave cloud'. This cloud over Lake gregory is an example of a wave cloud. For another picture of this day's sunset at Lake Gregory in Crestline, California, click here.

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Lenticular Cloud Sunset at Lake Gregory
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