Hi, new to this forum
On a flight in Namibia a while ago, I saw this cloud formation. Everyone in the plane was stunned and were taking pictures. It's hard to tell the scale but it went on for as far as the eye can see and was unlike anything I've ever seen.
It was a large expanse of flat (which went on all the way to the horizon) and ended VERY abruptly in a wall of cloud that seemed to be moving downwards. I can sort of see how this could be formed by competing air masses, but does it have a name, and could anyone explain it in more detail?
Here is a picture:
http://dl.dropbox.com/u/99566/cloud.JPG
Thanks!
