http://img224.imageshack.us/img224/9982/13nz.png
http://img224.imageshack.us/img224/5194/24xd.png

nguk wrote:
http://img224.imageshack.us/img224/9982/13nz.png
http://img224.imageshack.us/img224/5194/24xd.png




They are from different runs.

Basically it means 'no idea'.



--
Brian Wakem
Email: http://homepage.ntlworld.com/b.wakem/myemail.png

Any forecast 15 days ahead should be taken with a bucket of salt.

Last year, I was saving the GFS forecasts for 25 December each day from 9
December 2005 up to 23rd December.
http://www.djmurphy.demon.co.uk/christmas/

Its interesting to see how the forecast changes dramatically from one run to
the next, especially when it is a long way in advance.

Brendan

"Brendan DJ Murphy" wrote in
:

Any forecast 15 days ahead should be taken with a bucket of salt.

Last year, I was saving the GFS forecasts for 25 December each day
from 9 December 2005 up to 23rd December.
http://www.djmurphy.demon.co.uk/christmas/

Very interesting indeed - and it was only really the forecasts from 19th
onwards when the charts started to "settle down" - which really hammers
home why it's all good fun to look beyond T+144 - but I rarely do!

Richard

"Brendan DJ Murphy" wrote in message
...
Any forecast 15 days ahead should be taken with a bucket of salt.

Last year, I was saving the GFS forecasts for 25 December each day from 9
December 2005 up to 23rd December.
http://www.djmurphy.demon.co.uk/christmas/

Its interesting to see how the forecast changes dramatically from one run
to
the next, especially when it is a long way in advance.

Brendan

Thanks for that, interesting as Richard says. The inter-run detail changes
as you'd expect but I thought the GFS offered very useful guidance for the
change of type from the 14th, which is quite remarkable.

Jon.

I did a similar thing with some GFS 500 hpa and 850 hpa charts during last
December for similar reasons! If you or anyone are interested I can e-mail
them - don't have anywhere to post.

Dave
"Brendan DJ Murphy" wrote in message
...
Any forecast 15 days ahead should be taken with a bucket of salt.

Last year, I was saving the GFS forecasts for 25 December each day from 9
December 2005 up to 23rd December.
http://www.djmurphy.demon.co.uk/christmas/

Its interesting to see how the forecast changes dramatically from one run
to
the next, especially when it is a long way in advance.

Brendan

Two different operational runs.. so what?
If you take the ensembles over the last 2 days you will see the GFS has been
very consistent.
Look at the 12z operational run tonight.... certainly not consistent with
the other GFS members.
You need to compare the ensembles as a whole, which is difficult.
---------------------------------------------------------------------------

"nguk" wrote in message
...
http://img224.imageshack.us/img224/9982/13nz.png
http://img224.imageshack.us/img224/5194/24xd.png