An excellent example of how the upper trough currently extending SE has
engaged the previously weak front and the subsequent ascent has really
beefed up the rainfall -
http://www.avbrief.com/newcharts//rdcomp_anim_small.gif . A contrast today
for Midlands/SE parts after yesterday's sunshine.

Joe
--
Manchester, UK

An excellent example of how the upper trough currently extending SE has
engaged the previously weak front
-and v graphic in WV Joe
http://www.sat.dundee.ac.uk/pdus/BW/...31200BW1_g.jpg
and the developing low for tomorrow,due to 'bomb' to ~970hpa.

Wot's the record for May?

BTW large swathe of closed cells over the Atlantic
http://www.sat.dundee.ac.uk/abin/pic...3/1138/ch2.jpg
is this unusual?

--
regards,
david
(add 17 to waghorne to reply)

"Waghorn" wrote in message
...
An excellent example of how the upper trough currently extending SE
has
engaged the previously weak front
-and v graphic in WV Joe
http://www.sat.dundee.ac.uk/pdus/BW/...31200BW1_g.jpg
and the developing low for tomorrow,due to 'bomb' to ~970hpa.

Wot's the record for May?

BTW large swathe of closed cells over the Atlantic

http://www.sat.dundee.ac.uk/abin/pic...3/1138/ch2.jpg
is this unusual?

--
regards,
david
(add 17 to waghorne to reply)

Hi David,

You beat me to it, it looks very pretty indeed, as should satellite
pictures later on today as the aforementioned low bombs to 969hPa (as the
MetO would have it).

The closed convection is forming in Pm air behind the cold front which is
unstable to the sea temperatures. However, it is being suppressed by the
ridging aloft ahead of the trough deepening tomorrow's low, seen on the WV
image you posted. This warming should be evident on the 12Z Valentia
sounding, we'll wait and see.

ATB, Joe

"Waghorn" wrote in message
...
An excellent example of how the upper trough currently extending
SE has
engaged the previously weak front
-and v graphic in WV Joe
http://www.sat.dundee.ac.uk/pdus/BW/...31200BW1_g.jpg
and the developing low for tomorrow,due to 'bomb' to ~970hpa.

Wot's the record for May?

It's in danger ... 968.0mbar on 8 May 1943 at Sealand, near
Chester.

See http://www.wetterzentrale.de/topkarten/fsslpeur.html

Eight days later it was 1042.2mbar at Dublin, which stands as the
highest MSL pressure for May. The depression of the 7th-8th
was responsible for mean hourly 56kn at Bell Rock and gusts
of 72kn at Bell Rock, 66kn at Holyhead, and even 63kn at
Lympne inland in Kent ... and up to 75mm rain in E.Scot, most
of which fell as snow. A 2m drift covered the Braemar-Perth
road at Cluny Bridge. Also 90mm of rain in 24h (non rainfall
day) at Ashburton in Devon.

Philip Eden, with thanks to the relevant MWR and BR.

"Waghorn" wrote in message
...
An excellent example of how the upper trough currently extending SE
has
engaged the previously weak front
-and v graphic in WV Joe
http://www.sat.dundee.ac.uk/pdus/BW/...31200BW1_g.jpg
and the developing low for tomorrow,due to 'bomb' to ~970hpa.

Wot's the record for May?

BTW large swathe of closed cells over the Atlantic

http://www.sat.dundee.ac.uk/abin/pic...3/1138/ch2.jpg
is this unusual?

Unstable to just shy of 750hPa at Valentia -

http://weather.uwyo.edu/cgi-bin/soun... +Observatory

Joe

The closed convection is forming in Pm air behind the cold front which is
unstable to the sea temperatures. However, it is being suppressed by the
ridging aloft ahead of the trough deepening tomorrow's low, seen on the WV
image you posted. This warming should be evident on the 12Z Valentia
sounding, we'll wait and see.

ATB, Joe
Yes, that makes sense-one gets used to seeing open cells in PM air.
lots of striations in the cloud head of the new low and fine banding in the retreating cold front-
http://www.sat.dundee.ac.uk/abin/pro...roject.ch4.jpg

Thanks for the 'pic' BTW,

--
regards,
david
(add 17 to waghorne to reply)

Wot's the record for May?

It's in danger ... 968.0mbar on 8 May 1943 at Sealand, near
Chester.
Cheers Philip,

--
regards,
david
(add 17 to waghorne to reply)