BBC WFTWA last night presented a stark difference for a week's time between GFS (northern blocking, dry, NE-ly winds affecting N Sea coasts) and ECM (large depression to the SW, S-ly winds, a lot of rain often heavy). Both models seem to have stepped back from their more extreme positions this morning but there is still a difference.
WX summary (based on GFS) much as it was yesterday: the clear picture of week 1 with a line mid-France - Alps - Ukraine dividing cool to the N and war/hot to the S gets mixed up in week 2. The warmth advances on two fronts, one to Ireland and England (but not Scotland) and the other much warmer all the way up to Finland [not quite as far in today's chart]. In between, Germany remains cold. Rain mainly over the continent; week 1 Balkans - Poland - White Sea and week 2 Germany - Baltic - W Russia with some in N Spain and Alps. Britain looking quite dry, except a bit in the NW at first.[this morning a bit further E week 1 and further SE Week2; Britain not quite as dry and the rain never really leaves NW Scotland]
GFS Op: current LP N of Britain with W/NW winds moves to Baltic with HP 1030mb N Ireland Sat 28th. The HP drifts N-wards to leave Britain in a col between LPs Denmark and Portugal (the former is closer, so expect NE-lies); then a new HP area arising in the W and moving to cover all Britain Sun 5th. It lasts for a few days, enough for the Jubilee weekend, before withdrawing to the SW and an area of LP near Iceland brings in NW-lies.
GEFS: although mild/warm in S at firstt, mean temps generally drop to cool Mon 30th, back to norm Fri 3rd and staying there, with the usual outliers (control is a cold one). Not much rain at first, a little more probable later on esp in NW
ECM: similar to GFS until Mon 30th; but then instead of a col, the two LPs over Denmark and Portugal join forces to give general low pressure; and the LP to the SW becomes dominant 1005mb Cornwall Thu 2nd with S/SE winds (not as large and deep as shown by BBC). It moves N to Scotland Sat 4th with broad trough all the way down to the Med, HP staying in mid-Atlantic