Some cloud pictures - "roll clouds"

In the gallary of images on that article was the one below. This is a very interesting phenomenon.

australia_2009.jpg


Any information on them from an aviation hazard perspective like lenticulars?
 
Those are impressive sites.... There was something like that out near Marfa one day when I landed at the airport there.... It actually was that plus a wall of black - I was arranging to get my plane inside and talking w/ a man named John Bird (famous glider geezer) and he laughed and said that actually glider people liked those kinds of clouds.
All I could think of was getting the plane iside and then getting me inside!
 
In the gallary of images on that article was the one below. This is a very interesting phenomenon.

australia_2009.jpg


Any information on them from an aviation hazard perspective like lenticulars?

that is the morning glory wave phenomenon. i'd hazard a guess that the cloud is marking the rotor so stay out of the cloud. the laminar flow wave updraft on the upwind side of those clouds have enabled a lot of long distance glider and hang glider flights in Australia.
 
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