"Stu" wrote in message
...
They are lines of Thickness - in simple terms the lower the figure the
colder the air column is at that point - this is a very simple
explanation however...

Stuart Robinson
Leicestershire, England


"Stuart" wrote in message
...
What do the coloured lines reresent?

http://129.13.102.67/wz/pics/Rtavn1683.gif

There is a lot about these products he-

http://homepage.ntlworld.com/booty.w...dels/sites.htm

follow the link via 'Explanation' and choose either Westwind or
Wetterzentrale

Martin.


--
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