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Old September 23rd 05, 06:43 AM posted to uk.sci.weather
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Default Today's model interpretation (23/09/05)

Here is a summary of the latest NWP output for 12z on Tuesday. Issued 0542z,
23/09/05.

The models generally show a mobile setup for the UK, with wet and
(relatively) windy weather interspersed with settled days as ridges move
through. GFS and NGP both place more of an emphasis on high pressure
though - it remains to be seen whether the other models will back that up,
or whether GFS was an outlier. As ever, more runs are needed.

ECMWF: http://217.160.75.104/pics/Recm1201.gif
A trough covers the UK, bringing westerlies to all areas. A weak ridge moves
over England and Wales at T+144 to bring WSW'lies and SW'lies across the UK,
followed by by more of the same at T+168.

MetO: http://217.160.75.104/pics/Rukm1201.gif
A large high lies to the SW with a ridge over Biscay. A deep low is located
to the east of Iceland and the UK is sandwiched between the two, with
westerlies. The winds become stronger WSW'lies at T+144 as the high builds
NE'wards.

GFS: http://217.160.75.104/pics/Rtavn1201.gif
The UK lies under a ridge with WNW'lies for England and Wales; elsewhere
winds are SW'lies. A shallow low moves over England at T+144 with
northerlies for most areas as a result. By T+168 pressure builds over
Ireland and Scotland, leaving England and Wales under NNE'lies.

GEM: http://217.160.75.104/pics/Rgem1201.gif
Unavailable today.

GME/DWD:
http://www.wetter.com/home/img/sat/g...230000_120.gif
Westerlies and NW'lies cover the UK with high pressure to the SW. The high
moves eastwards at T+144, leading to westerlies for all.

JMA: http://217.160.75.104/pics/Rjma1201.gif
The Japanese run shows the UK between a low to the north and a ridge to the
south, with westerlies as a result. The winds are gale force over Scotland
although they become lighter NW'lies across the UK on day 6 as a ridge moves
eastwards.

NOGAPS: http://217.160.75.104/pics/Rngp1201.gif
Westerlies cover the UK, once again due to a high to the south and a low to
the north. The high builds over much of the UK at T+144 with westerlies for
Scotland.

KMA: http://www.kma.go.kr/kma03/gif/g21nh_smsr_120.gif
The Korean model shows strong NW'lies as the result of a trough over the
North Sea.




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