A Lenticular Cloud Over Hawaii

Astronomy Picture of the Day · 2005-08-21 · NASA (public domain)

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A Lenticular Cloud Over Hawaii — APOD for 2005-08-21

Can a cloud do that? Actually, pictured above are several clouds all stacked up into one striking lenticular cloud . Normally, air moves much more horizontally than it does vertically. Sometimes, however, such as when wind comes off of a mountain or a hill , relatively strong vertical oscillations take place as the air stabilizes. The dry air at the top of an oscillation may be quite stratified in moisture content, and hence forms clouds at each layer where the air saturates with moisture. The result can be a lenticular cloud with a strongly layered appearance. The above picture was taken near Mauna Kea , Hawaii , USA .

Astronomy Picture of the Day for 2005-08-21 — image & explanation courtesy of NASA (public domain), mirrored at Tukuk-OS for reading and search convenience.

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