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 SATURDAY JUNE 13TH 2015.
THE CURRENT GENERAL SITUATION A weakening trough of Low pressure slow moving acoss Central parts of England and Wales will weaken further and return SE across SE Britain as pressure builds from the West tomorrow.
http://www.wetterzentrale.de/pics/Rtavn001.gif
MODELS-2 WEEK HEADLINE Mostly fine and warm across the South and West. Cloudier with a little rain at times in the North.
THE GFS JET STREAM FORECAST The GFS Jet Stream Forecast shows the flow to the North of the UK ebbing and flowing a little South then ridging back North later in the week. The flow then becomes more cyclonic around a cut off Low near Southern Britain late in the run.
http://www.netweather.tv/index.cgi?action=jetstream
GFS OPERATIONAL The GFS Operational today shows High pressure largely in control of the weather often situated to the SW of the UK and most influential to the South of the UK with more of an occasional intervention of Atlantic fronts from the Atlantic affecting the North. Later in the run High pressure shifts more towards the North of the UK with a switch to North as best as thundery Low pressure again shows some ingress into Southern Britain later
http://www.wetterzentrale.de/pics/Rtavn1441.gif
http://www.wetterzentrale.de/pics/Rtavn3841.gif
THE GFS CONTROL The GFS Control run is High pressure based too for the next week to 10 days again positioned out to the SW of the UK throwing a ridge towards Southern Britain. Then through the second week the more changeable conditions affecting the North will become much more widespread as Low pressure becomes dominat across the UK in the latter stages of the period.
THE GFS CLUSTERS The GFS Clusters today some members showing fine weather holding on across the UK in two weeks time but with an increased group today indicating that Low pressure maybe showing a greater hand on conditions across the UK probably from the NW.
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 a lot of dry and warm weather across the South with a period of cloudier, windier and occasionally damper weather for a period midweek in the North. Then late in the week High pressure affecting the South is shown to build back across the North too by next weekend with fine and warm conditions.
http://www.wetterzentrale.de/pics/Rukm1441.gif
THE FAX CHARTS The Fax Charts look broadly similar to the raw data as High pressure ridging in from the SW squeezes the life out of the weakening troughs across the South and then with a weakening cold front approaching from the West by later in the week.
http://www.weathercharts.org/ukmomslp.htm#t120.
GEM GEM shows very similar dynamics through the period as High pressure ridging across the South early in the week is interrupted in the North by troughs and some rain midweek before all areas join in with better weather later in the run as High pressure builds across all areas with some fine and warm conditions for all.
http://www.wetterzentrale.de/pics/Rgem2401.gif
NAVGEM NAVGEM shows a very summery period developing late in the week with the tentative High pressure affecting the South early and midweek extending to all areas later with fine and in places very warm and sunny weather by next weekend especially across the South.
http://www.wetterzentrale.de/pics/Rnvg1681.gif.
ECM ECM shows South and West is best this week as High pressure to the SW exerts it's best influence to these areas while in the North and East cloudier and cooler weather with a little rain in association with weak fronts travelling SE midweek and again later in the week slows the progress of better weather to the North. then at the very end of the run a fall in pressure could bring some showers almost anywhere and a cool northerly could be noticeable across the east for a time.
http://www.wetterzentrale.de/pics/Recm2401.gif
ECM 10 DAY MEAN The ECM 10 Day Mean Chart from last night remains locked on the fact that High pressure is likely to be strongly ridged across the UK from the SW in 10 days time.
http://www.wetterzentrale.de/pics/Reem2401.gif
NOTABLE TREND CHANGES FROM PREVIOUS RUNS The trends between the models remain mostly focused on High pressure becoming influential eventually to all areas.
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 96.9 pts followed by UKMO at 95.8 pts and GFS at 95.6. At 5 days ECM leads GFS at 86.0 pts with UKMO at 83.1 pts and GFS at 82.4 pts. At 8 days ECM clocks in ahead of GFS at 49.5 over 40.8. Then at Day 10 ECM remains slightly ahead of GFS at 31.4 pts to 22.5 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 Fine Summerlike conditions across the UK still look likely to be affecting many parts of Britain although patience for the very best weather may be necessary especially if you live in the North. High pressure to the SW remains the focus of attention for this as it ridges towards Southern Britain through the week and to all areas from next weekend. The North will see more Atlantic winds and occasional rain as troughs move across from the West especially midweek before pressure builds across these areas too later bringing the good weather covering the South for much of the time across these Northern areas too. Some very warm weather can be expected especially across the South and SW which remain closest to the centre of the High pressure. Then as we move through Week 2 although some evidence of a breakdown perhaps into another thundery or cooler showery period is shown and this includes ECM this morning this is by no means set in stone and could be due to individual variances between the runs. The ensembles look good though in the 10 day period from all output and it's not until we reach the outer limits of the period that more unsettled conditions show a bit more coherence today. So lets continue to look forward to a period of good summer weather when the large proportion of the time is dry, fine and warm with just the usual summer caveats of the North seeing a rain at times or the chance of a thundery shower or two in the South again later in the period
Next update from 08:00 Monday June 15th 2015
No report tomorrow. Will be back as normal Monday morning.
Edited by user
13 June 2015 07:13:02
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Reason: Not specified
Martin G
Kilmersdon Radstock Bath Somerset