HERE IS MY LATEST ANALYSIS USING DATA SUPPLIED BY THE NWP OUTPUT COVERING 5 OF THE WORLDS MOST POWERFUL WEATHER COMPUTERS ISSUED AT 08:00 ON FRIDAY JUNE 12TH 2015.
THE CURRENT GENERAL SITUATION A thundery trough of Low pressure is moving up into southern Britain today before stalling and weakening over Central areas tonight and tomorrow.
http://www.wetterzentrale.de/pics/Rtavn001.gif
MODELS-2 WEEK HEADLINE After a brief showery period settled and possibly warm weather should return next week, especially in the South and West.
THE GFS JET STREAM FORECAST The GFS Jet Stream Forecast shows the flow much weaker than of late with the flow generally to the NW of the UK. Through the run today the flow remains quite weak and difficult to pin down in terms of positioning and orientation
http://www.netweather.tv/index.cgi?action=jetstream
GFS OPERATIONAL The GFS Operational today continues to show High pressure largely in control of the UK weather, positioned close to or over the UK in the coming weeks. While not necessarily over hot from it's positioning this morning plenty of fine and dry weather is likely for all with the sunniest and warmest conditions developing across the South and West while the North and East may see more in the way of cloud and slightly lower temperatures at times especially for a time later next week and more generally right at the end of the period.
http://www.wetterzentrale.de/pics/Rtavn1441.gif
http://www.wetterzentrale.de/pics/Rtavn3841.gif
THE GFS CONTROL The GFS Control run is largely quite similar to the operational with the SW as best for temperatures and fine weather as High pressure lies close to the SW or west for much of the time. The run also shows the same more changeable weather as the operational shown right at the end of the period for a time.
THE GFS CLUSTERS The GFS Clusters today show fine weather well in control of the weather largely from a ridge lying to the SW or by some members over the UK.
http://www.weatheronline.co.uk/cgi-bin/expertcharts?LANG=en&MENU=0000000000&CONT=euro&MODELL=gefs&MODELLTYP=2&BASE=-&VAR=cpre&HH=372&ZOOM=0&ARCHIV=0&RES=0&WMO=&PERIOD=
UKMO UKMO today is slightly less encouraging than yesterday in that it takes the warmer and High pressure based air developing early next week away to the South later as a strengthening WNW flow drags troughs in cooler air with occasional rain down across many parts of the UK soon after midweek.
http://www.wetterzentrale.de/pics/Rukm1441.gif
THE FAX CHARTS The Fax Charts follow the raw data well with the removal of the complex thundery trough structure on Sunday as High pressure builds across the UK and then troughs queue up out to the NW by the middle of the week.
http://www.weathercharts.org/ukmomslp.htm#t120.
GEM GEM looks much like UKMO this morning in it's first 6 day period with a push of cooler Atlantic driven air spoiling the improvements of early next week with cloud and some rain later in the week. It is just a temporary spoiler though as High pressure rebuilds across the UK by the end of the run with fine and in places warm weather returning next weekend.
http://www.wetterzentrale.de/pics/Rgem2401.gif
NAVGEM NAVGEM too shows High pressure early next week with some sunshine and warm temperatures. However, it too later in the week shows winds veering to a cooler Northerly though away from the far North and East a lot of dry and sometimes bright weather may ensue.
http://www.wetterzentrale.de/pics/Rnvg1681.gif.
ECM ECM looks more encouraging than some of the rest through the middle section of next week as High pressure remains closer in towards western Britain restricting any influence of cooler Atlantic Westerly or NW'ly winds to the far north and East.
http://www.wetterzentrale.de/pics/Recm2401.gif
ECM 10 DAY MEAN The ECM 10 Day Mean Chart from last night remains encouraging as a ridge from the Azores anticyclone remains led across the UK from the SW on Day 10.
http://www.wetterzentrale.de/pics/Reem2401.gif
NOTABLE TREND CHANGES FROM PREVIOUS RUNS The trend of the models today have introduced more of a hiatus in the High pressure based outlook towards the middle and end to next week as West or NW winds bring cooler and cloudier conditions South and East across the UK not previously shown as extensive.
31 DAY HISTORICAL VERIFICATION STATS FOR GFS, UKMO & ECM The current verification statistics for the past 31 days shows ECM leading the way at 3 days with 96.8 pts followed by UKMO at 95.8 pts and GFS at 95.6. At 5 days ECM leads GFS at 85.9 pts with UKMO at 82.9 pts and GFS at 81.9 pts. At 8 days ECM clocks in ahead of GFS at 48.9 over 42.6. Then at Day 10 ECM remains slightly ahead of GFS at 29.8 pts to 21.9 pts.
http://www.emc.ncep.noaa.gov/gmb/STATS_vsdb/allmodel/daily/cor/cor_day3_PMSL_MSL_G2NHX.png
http://www.emc.ncep.noaa.gov/gmb/STATS_vsdb/allmodel/daily/cor/cor_day5_PMSL_MSL_G2NHX.png
http://www.emc.ncep.noaa.gov/gmb/STATS_vsdb/allmodel/daily/cor/cor_day8_PMSL_MSL_G2NHX.png
http://www.emc.ncep.noaa.gov/gmb/STATS_vsdb/allmodel/daily/cor/cor_day10_PMSL_MSL_G2NHX.prig
MY THOUGHTS While I remain optimistic about the overall pattern of the weather across the UK over the coming weeks as usual some caveats have developed in the last 24 hours which may limit the improvements I predicted yesterday at least for a time, The thundery trough of the weekend is still predicted to be out of the way by Monday with some dry and bright conditions developing for several days with warming days but chilly nights again for a time. By midweek winds will blow from the West across the UK and an incursion of a trough up to the NW looks like it could bring a cloudier and damper phase to the North and generally weaken good conditions in the South too. It does look a short lived down turn though as High pressure is then shown by most models to regain control across the UK with fine and warm conditions developing for all by and over next weekend and into week 2. The main difference between yesterdays and todays output is an underlying problem we have had for ages now in that we cannot seem to get High pressure in exactly the right place with the centre always wanting to position just to the West and SW rather than over the UK. These small synoptical differences can and do have radical surface differences in conditions across the British Isles which on this occasion look like reserving the very best of conditions across the South and West of the UK. Nevertheless there remains a lot of reason for optimism and all areas should enjoy some fine and warm conditions still across the next few weeks though we may be chasing areas of cloud in a West or NW breeze at times across the North and East.
Next update from 08:00 Saturday June 13th 2015
Martin G
Kilmersdon Radstock Bath Somerset