Current satellite imagery shows an impressive cloud head over Ireland with marked striations,heavy
rain (with a few sferics) and a developing cold front.This is analysed as a double frontal structure
on the current Met O chart.
22 Km NMM shows an area of high helicity crossing the UK this afternoon-
http://www.unibas.ch/geo/mcr/3d/meteo/
if this is in phase with the upper air forcing I wonder weather line convection/squall
line/tornadoes are possible as on the 28th?

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

Latest NOAA pass catches the development
http://www.sat.dundee.ac.uk/abin/pro...roject.ch2.jpg
inc a rope cloud on the leading edge of the cold air advection over the Atlantic.
12Z RAObs show high low level lapse rate and instabilty and dry air aloft at Valentia-
http://weather.uwyo.edu/cgi-bin/soun...112&STNM=03953
rather bizarre looking sounding from Brest-
http://weather.uwyo.edu/cgi-bin/soun...112&STNM=07110
presumably in the low level conveyor belt,

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

"Waghorn" wrote in message
...
Current satellite imagery shows an impressive cloud head over Ireland with
marked striations,heavy
rain (with a few sferics) and a developing cold front.This is analysed as
a double frontal structure
on the current Met O chart.
22 Km NMM shows an area of high helicity crossing the UK this afternoon-
http://www.unibas.ch/geo/mcr/3d/meteo/
if this is in phase with the upper air forcing I wonder weather line
convection/squall
line/tornadoes are possible as on the 28th?


I've been thinking the same, David. Currently (14Z) there's a marked
line/forward edge running from the SW approaches to the Isle of Man and over
NE Scotland (radar helps to pick it out in the north). This combined with
the reports from Joe and Alex suggests line convection on the outer surface
cold front.

Vis image http://www.metoffice.gov.uk/satpics/latest_uk_vis.html

Jon.