These two images show the features quite well. They look like Von Karman
vortices, but I have also seen ones similar to these develop over the open
ocean. In that case, if they were downwind of any land it was more than 500
km away.
http://www.btinternet.com/~wokingham...1410-b-uk.html
http://www.btinternet.com/~wokingham...1410-d-fr.html
--
Bernard Burton
Wokingham, Berkshire, UK.

Satellite images at:
www.btinternet.com/~wokingham.weather/wwp.html
"Trevor Appleton" wrote in message
...

OK who can work out what the circular feature is over Holland? (log in
required - free reg)


http://www.sat.dundee.ac.uk/abin/pro...5/1412/project.
ch2.jpg