What is Lenticular cloud?
[[File:Saucer cloud over Campbell Mesa, AZ.jpg|thumb|right|240px|alt=|Lenticular cloud over Campbell Mesa, [[Flagstaff, Arizona]].]] A '''lenticular cloud''' (''Altocumulus lenticularis'') is a type of [[cloud]] that generally forms at high [[altitude]]s. They are shaped like [[disc]]s and remain roughly in the same position. Because of the way they are shaped, they have been offered as an explanation for some [[unidentified flying object|UFO]] sightings. Lenticular clouds are formed when the wind forces the air up a mountain ridge to where the air is cool enough for [[water vapor]] to condense. == References == {{reflist}} {{weather-stub}} [[Category:Clouds]]