For those that like a challenge .... imagine the cloud structure out to
the SW of the British Isles on the 12Z ASXX.

http://www.weather.org.uk/charts/UKCpf000.gif

(Used to be so much easier before satellite imagery and multiple-level
model diagnostics! The phrase "we are not worthy" spring to mind.)

Martin.

[ for those that don't know... the sequence of fronts is: - frontolysing
surface warm front, then a 'standard' surface warm front, followed by an
upper cold front, then a 'standard' surface cold front, and chasing up
the rear, several surface troughs. Glad I've not got to code that little
lot up.]

--
Martin Rowley
Bracknell