"Mike Tullett" wrote in message
...
I bet this will confound some opinions on anticyclonic weather, with a
band
of rain moving in from the west on Friday across Ireland and then into
other northern areas on Saturday. Six hour rainfall figures of up to 5mm
seem to be forecast

http://www.wetterzentrale.de/pics/Rtavn364.html

It seems to be associated with a short wave upper vortex moving through
the
high.

http://www.wetterzentrale.de/pics/Rtavn361.html

The MO FAX charts have this marked as a cold front.

http://www.wetterzentrale.de/pics/brack0a.html

--
Mike 55.13°N 6.69°W Coleraine posted to uk.sci.weather 12/02/2004
13:22:57 UTC
Temperature +8C


Not come across this before.....what causes it, interested in exactly what a
short wave upper vortex is..

JP