Jetstream - the current loop N of the UK soon dissipating in favour of a W-ly flow later this week, lasting to Tue 30th but weaker than previously forecast. Another loop then breaks up the flow and the tendency Thu 1st - Tue 6th is then for the jet to split into two, a N branch near Iceland (though with occasional bits briefly breaking off to visit the UK) and a S branch across N Africa.
GFS - current HP declines as in previous forecasts with Atlantic trough carried in on W-lies Fri 26th - but W-ly spell now appears more short-lived as HP from S and SW build to place centre over UK as a whole 1035mb Thu 1st, It retrogresses to a position S of Greenland allowing LP over Spain/France to affect mainly the S of UK by Sun 4th. Finally, GFS hasn't given up on a N-ly blast; today's version is back over the UK Wed 7th and reviving the LP over France for what looks like a rather cold and wet spell after Easter.
GEFS - brief dip in temp Fri 26th soon recovering to be mild to Sat 3rd. Variation between runs is already happening then, most noticeable in Scotland, and becomes greater everywhere, with op and control both favouring a cold end by Thu 8th. Little prospect of rain in the S (brief blip on Fri 26th), rather more days with rain in NW England and in Scotland but not in great amounts
ECM - same as GFS to Fri 26th but then quite different - a further Atlantic trough on Mon 29th which leaves LP generally over the UK with a small depression localised 985mb Hebrides Wed 31st and then another 1000 mb Cornwall Fri 1st, both combining to draw in air from far N- looks much colder than GFS.
Originally Posted by: DEW