What do the coloured lines reresent?

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

On Tue, 4 Jan 2005 17:14:52 -0000, Stuart wrote in


What do the coloured lines reresent?

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

Assuming you mean the green and blue lines - they indicate the thickness of
the 1000hPa to 500 hPa layer in decametres. The greater the value the
warmer the air is. Get some way below the 528 line and snow is
increasingly likely and at 510 is virtually certain.

--
Mike 55.13°N 6.69°W Coleraine posted to uk.sci.weather 04/01/2005 17:22:59 UTC

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

"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.


--
FAQ & Glossary for uk.sci.weather at:-
http://homepage.ntlworld.com/booty.weather/uswfaqfr.htm

In article ,
Mike Tullett writes:
On Tue, 4 Jan 2005 17:14:52 -0000, Stuart wrote in


What do the coloured lines reresent?

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

Assuming you mean the green and blue lines - they indicate the thickness of
the 1000hPa to 500 hPa layer in decametres. The greater the value the
warmer the air is. Get some way below the 528 line and snow is
increasingly likely and at 510 is virtually certain.

In case Stuart is a beginner, I feel that I should add the caveat: this
is assuming that you actually get some precipitation rather than it
remaining dry!
--
John Hall

"I don't even butter my bread; I consider that cooking."
Katherine Cebrian

"John Hall" wrote in message
...
In case Stuart is a beginner, I feel that I should add the caveat: this
is assuming that you actually get some precipitation rather than it
remaining dry!
--
John Hall

Hi John,

If no precipitation was possible with sub 510dm air this assumes an
inversion of sorts relatively near to the surface (not a great depth of
instability is required at such low temperatures to create precipitation).
Therefore, sub 510dm air with an inversion would imply very cold surface
conditions, something I wouldn't be a particular fan of !

Joe

"Joe Hunt" wrote in message
...

"John Hall" wrote in message
...
In case Stuart is a beginner, I feel that I should add the caveat: this
is assuming that you actually get some precipitation rather than it
remaining dry!
--
John Hall

Hi John,

If no precipitation was possible with sub 510dm air this assumes an
inversion of sorts relatively near to the surface

Snip

Or there's simply not enough insolation to generate significant convection.

Jon.

"Jon O'Rourke" wrote in message
...
"Joe Hunt" wrote in message
Hi John,

If no precipitation was possible with sub 510dm air this assumes an
inversion of sorts relatively near to the surface

Snip

Or there's simply not enough insolation to generate significant
convection.

Jon.

Hi Jon,

My post wasn't clear, I was relying on SST's to trigger convection in this
hypothetical situation.

Joe