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 TUESDAY JUNE 16TH 2015.
THE CURRENT GENERAL SITUATION A ridge of High pressure across the South of the UK today will be superceded by a weakening front moving slowly South across the UK later today, tonight and tomorrow.
http://www.wetterzentrale.de/pics/Rtavn001.gif
MODELS-2 WEEK HEADLINE A lot of dry and bright weather with just isolated showers in relatively warm conditions in the South.
THE GFS JET STREAM FORECAST The GFS Jet Stream Forecast remains rather pessimistic in mood over the coming two weeks as the flow undulates across the UK in the coming days before strengthening under a UK trough next week and continuing in similar unseasonal mood in strength and positioning through Week 2 with very changeable weather likely for the UK as a result.
http://www.netweather.tv/index.cgi?action=jetstream
GFS OPERATIONAL The GFS Operational today shows High pressure never far away from the South or SW of England over the coming days maintaining a ridge towards the South with fine bright and reasonably warm conditions at times. Further North more cloud and a little rain at times seem likely from weak Atlantic troughs and with time the ridge over the South becomes tenuous enough to allow these troughs to slip further South and SE across the UK. Then next week the ridge loses influence altogether with a period of cyclonic weather with rain or showers for all later next week before a more NW/SE setup seems likely with the wetter conditions transferring towards the North and West in mild SW winds.
http://www.wetterzentrale.de/pics/Rtavn1441.gif
http://www.wetterzentrale.de/pics/Rtavn3841.gif
THE GFS CONTROL The GFS Control run is a lot better if it's a continuation of fine and dry weather your after. Although a weakening of the High pressure ridge this coming weekend and early next week is indicated with a period of slack winds promoting a few showers High pressure builds back more favourably positioned later to draw some very warm air across the UK from the South for a while with a thundery breakdown late in the period and more unsettled weather to finish the period in the North and NW.
THE GFS CLUSTERS The GFS Clusters remain focused on High pressure out to the SW with a rridge towards the UK promoting a lot of fine weather still in two weeks time. There are of course some exceptions to this general rule of thumb with a more Atlantic based pattern with rain at times but these members remain in the minority at the moment.
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 shows High pressure maintained out to the SW with a ridge towards the UK in a light NW flow for many. A few showers may develop by the weekend and even more so early next week as a slightly more enhanced trough slips SE across the UK early next week.
http://www.wetterzentrale.de/pics/Rukm1441.gif
THE FAX CHARTS The Fax Charts show High pressure continuing to be held out to the SW of Britain with weak frontal troughs invading the airspace of the UK weakened by the associated ridge from the High across the South of the UK.
http://www.weathercharts.org/ukmomslp.htm#t120.
GEM GEM remains High pressure orientated comfortably in control of the weather across the UK with just a period of slacker pressure early next week that could promote the odd shower or two for a time and the odd trough affecting the far North of the UK at times too.
http://www.wetterzentrale.de/pics/Rgem2401.gif
NAVGEM NAVGEM too undulates a High pressure ridge towards and away from the South of the UK over the coming days and week with a NW flow carrying weak troughs down over the North and East at times perhaps with the odd shower.
http://www.wetterzentrale.de/pics/Rnvg1681.gif.
ECM ECM is quite progressive in it's demise of the High pressure ridge early next week as shallow Low pressure moves into the UK next week promoting showers and outbreaks of rain and somewhat cooler conditions. By the end of the run though High pressure building South of the UK looks like it could bring back warm and settled weather to at least the South and East of the UK towards the end of next week.
http://www.wetterzentrale.de/pics/Recm2401.gif
ECM 10 DAY MEAN The ECM 10 Day Mean Chart from last night shows that our long lasting High pressure ridge is slowly being replaced by something of a bias towards a UK trough in slack winds looking likely in 10 days time. The methodology used to create the chart hides the patterns which make up it's view and vary quite a bit ine to another between both better and worse than what's shown.
http://www.wetterzentrale.de/pics/Reem2401.gif
NOTABLE TREND CHANGES FROM PREVIOUS RUNS The trends between the models remain mostly focused on High pressure remaining influential across the UK in the shape of a ridge towards Southern Britain from the Azores anticyclone though some ingress of Low pressure from the NW does feature from some output next week.
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 97.0 pts followed by UKMO at 95.8 pts and GFS at 95.7. At 5 days ECM leads GFS at 86.7 pts with GFS at 83.3 pts and UKMO at 83.2 pts. At 8 days ECM clocks in ahead of GFS at 49.7 over 44.0. Then at Day 10 ECM remains slightly ahead of GFS at 31.3 pts to 21.3 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 Once again this morning the models remain largely focused on the behaviour of High pressure positioned out to the SW of the UK and how much influence it holds across the UK. In the short term it does allow some weak fronts to cross South across the UK but rainfall amounts will be very restrictive and mostly towards the North. Cloud amounts will be large at times and this may hold temperatures down to comfortable levels in the North but some warm weather could be experienced in the South. Then next week there are indications with some cross model support that a period of more showery weather may develop as a more enhanced trough moves down from the North in the light flow. ECM is the most progressive of these outcomes with several days of relatively cool and unstable conditions. However, it does indicate too that High pressure may well build back after this at least across the South and East where hints that it might become very warm are shown. So in a nutshell today prospects remain reasonable and while a heatwave looks very unlikely in the near future as long as that High pressure remains out to the SW conditions look favourable enough for most people to enjoy some fine early Summer weather and although this may be punctuated with odd days of cloud and a little rain or showers no large rainfall amounts look likely across most areas of the UK for the next few weeks at least.
Next update from 08:00 Wednesday June 17th 2015
Martin G
Kilmersdon Radstock Bath Somerset