skyeye
A Lenticular Cloud Over Hawaii

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
last week near Mauna Kea, Hawaii, USA.