- Wave pattern in turbulent and smooth clouds over mountains
![Wave pattern in turbulent and smooth clouds over mountains](http://www.skyartstock.com/peas/W882319F-SKYART.jpg)
- W882319F
- A wave pattern shows clouds over distant mountains, a clear gap, and a cloud sheet overhead in the first lee wave. The air rising into the wave crest is turbulent and condenses unevenly. Note how the bright outer fringe is still water cloud (Altocumulus) but soon thickens and begins to freeze into a more uniform Altostratus sheet.
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