ECM charts not updated on the TWO viewer...
In summary, the model now shows the LP development Tue-Wed next week that GFS has been going for, which clears the warm, muggy air mass away while bringing a fair amount of rain for most of us. It's then much cooler for the final few days of the month with a risk of frost overnight as a ridge of high pressure drifts through the UK.
GFS persists with that idea, and at about the same pace of the 00z, after that faster 06z run. It then brings in the next Atlantic low more quickly than ECM does, meaning we're back in a mild air stream again after about a day of the fresh conditions.
UKMO still doesn't go for that LP development, so the transition to a cooler, fresher regime is a slower affair.
GEM develops the LP but doesn't take it NE so readily as GFS and ECM, instead having it slide south towards Spain for a day or so, after which it dissipates - the mild regime holds on to the end of the 30th, similar to today's ECM 00z run.
So... not much clarity on how quickly things progress next week, but the general theme of one Atlantic trough moving away to the NE and being replaced by another one out to our west - perhaps tracking more E than NE - is consistent across the models.
Up in the Arctic, there's not much in the way of developments to report, with the PV still looking to remain disorganised over the next 10 days and probably longer based on current output.
Originally Posted by: Stormchaser