Momza Posted November 22, 2011 Share Posted November 22, 2011 When did these clouds start appearing? Any info on Asperatus would be appreciated. Link to comment Share on other sites More sharing options...
isohume Posted November 26, 2011 Share Posted November 26, 2011 These clouds have always been around and we used to see them once in a while in Iowa after thunderstorms. There is a push ongoing now to get them classified as a new cloud type by the WMO. They are fairly uncommon, but with everyone havng access to high resolution cameras these days they are being brought to the public's attention more. It's a stable cloud and the theory is they get their undulating appearance by strong caa/subsidence winds behind a frontal system and become "trapped" or ducted in the moist stable layer, much like a gravity wave. Here is a neat shot of them over Cedar Rapids, IA. Very menacing looking, but relatively benign at the sfc. Not sure if they're safe for general aviation tho. Link to comment Share on other sites More sharing options...
LiQuiDBuD Posted November 27, 2011 Share Posted November 27, 2011 I'd say by their appearance that you wouldn't wanna get near those in a single engine plane. Very cool to look at with your feet on the ground though! Link to comment Share on other sites More sharing options...
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