After this weekend with troughs in the westerly stream passing through, high pressure is around for the next couple of weeks. GFS still not certain on how it develops - today's version is Wed 18th 1030mb over the S with link to Atlantic centre; the latter moves N to Scotland Sat 21st 1045mb with N or NE winds developing; then to Baltic Wed 25th 1040mb with ridge to UK and E-ly winds; further E again by Sat 28th and new centre over Iceland at that time with slack LP over UK. Complex, but not the simple HP centred over the UK as suggested yesterday.
ECM similar though more of a ridge to Europe on Sat 21st which means less of the N/NE-lies
GEFS cool-mild-cool-mild to 18th then down to 5C below normal on 21st, mean of runs recovering to normal but with plenty of scatter. Dry in the S, a little rain at first and around the 18th in the N (though just one run has a startling peak of 25mm rain on the 20th in the S).
Originally Posted by: DEW