[NetBehaviour] Unusual Clouds Over Providence

Alan Sondheim sondheim at panix.com
Fri Oct 21 04:53:01 CEST 2016



Unusual Clouds Over Providence

http://www.alansondheim.org/pvdcloud11.jpg
http://www.alansondheim.org/pvdcloud.mp4

These clouds, moving at somewhat high, passed over downtown
Providence this afternoon. They're extremely unusual, and seem
to be combinations of wave clouds, kelvin-helmholtz
instabilities, and mammatus clouds. the images in the video are
in the same sequence as taken; you can see the rapid
transformations as the types (which also included the usual
cumulus) revealed unusual forms of turbulence. The sequence
lasted about an hour. The resolution of the original images is
2592 x 1944; levels were compressed to bring out details. Oddly,
I found a book for sale at the library on how to dance - exactly
what the clouds, indeed the atmosphere, was doing.




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