I've never given lenticular clouds much thought before, moist, stable air runs into a huge mountain, rises, cools to its dew point, cloud forms and stays in place until conditions change.
Yesterday I went to Paradise Mt. Rainier, about a 2 hour drive from my house near Seattle.
As I time lapsed the small isolated lenticular cloud just to the east of the mountain, I noticed that in the updrafts as the lenticular maintained its shape, that there were vortices embedded and some became rather defined and isolated. This was especially noticeable as the cloud was breaking down and struggling to maintain the classic lenticular look.
I suppose it makes sense as the air is forced over the huge mountain there is a void that would be filled with updrafts in the low pressure created by the flow.
Ill post a couple pictures here, but it gave me a new fascination with Lenticular clouds.