Here is a summary of the latest NWP output for noon on Friday. Issued 0557z,
19/07/04.
Today's runs are mixed again today. The general theme is one of increasingly
settled conditions and rising temperatures, but there are large variances in
the position and track of the highs. As ever, more runs are needed.
ECMWF:
http://64.246.48.81/pics/Recm1201.gif
Low pressure is located to the NW, with a weak ridge over the Irish Sea. As
a result, Scotland and Northern Ireland lie under SW'lies, with NW'lies
elsewhere. The winds become southerlies and SW'lies at T+144 as a ridge
builds over England and Wales, followed by SW'lies and easterlies for many
at T+168 as the ridge moves northwards.
MetO:
http://www.wetterzentrale.de/pics/Rukm1201.html
The Met Office run shows the Azores High to the WSW of the UK and a trough
over the North Sea. A mixture of northerlies, NW'lies and NNW'lies covers
the UK, although by T+144 the winds become NW'lies for all as the high
builds to the SW.
GFS:
http://64.246.48.81/pics/Rtavn1201.gif
The UK lies under northerlies and westerlies, with a ridge across Ireland.
850hPa temperatures vary from +3C over NW Scotland to +13C over Kent. The
ridge builds across the UK at T+144, leading to westerlies for northern
areas and easterlies for southern England. Very little changes at T+168, or
day 8; for that matter even by day 9 high pressure covers the UK. Day 10
sees the high moving NE'wards, allowing easterlies and SE'lies to cover the
UK.
GEM:
http://www.meteocentre.com/models/glb00_120.html
The Canadian run shows low pressure dominating the UK, with the centre to
the west of Ireland and a trough over England. Winds are SW'lies,
southerlies and SSE'lies, with 850hPa temperatures from +7C over NW Scotland
to +14C over Kent. The winds become WSW'lies at T+144 as the low deepens to
the NW.
JMA:
http://www.wetterzentrale.de/pics/Rjma1201.html
Scotland and Northern Ireland are affected by WSW'lies and SW'lies
respectively, with high pressure over England and Wales. 850hPa temperatures
vary from +3C over northern Scotland to +12C over southern England. Not a
great deal changes at T+144, although the winds for northern and western
areas increase in strength. T+168 sees the UK under lighter southerlies,
with high pressure to the east and a trough to the west. The trough moves
over the UK on day 8, with light cyclonic winds for all.