HERE IS MY LATEST ANALYSIS USING DATA SUPPLIED BY THE NWP OUTPUT COVERING 5 OF THE WORLDS MOST POWERFUL WEATHER COMPUTERS.
THE CURRENT GENERAL SITUATION A ridge of High pressure will move away SE today followed by a mild and in the NW strong SW flow with a trough of Low pressure slow moving across the NW
http://www.wetterzentrale.de/pics/Rtavn001.gif
MODELS-2 WEEK HEADLINE A lot of dry and reasonably mild weather with some sunshine in the South and East but occasional rain possible at times especially over the North.
THE GFS JET STREAM ENSEMBLE FORECAST The Jet Stream Ensemble Forecast shows the flow continuing to blow strongly over the Atlantic but turning NE across the far NW of the UK before the axis moves slowly South across the UK later. Then later still it shifts well to the NW as High pressure forms over the UK.
http://www.theweatheroutlook.com/twodata/datukgfshires.aspx?display=jetstream&model=gfs
GFS OPERATIONAL The GFS operational today shows changeable conditions next week between High pressure to the South and Low to the far North and NW with a West or SW flow over the UK delivering occasional spells of rain and wind across the UK, always heaviest in the North. Late in the run High pressure develops across the UK before migrating further North allowing a spell of fine Spring weather with temperatures slowly falling off at the end of the run as winds become Easterly with colder air waiting in the wings to the East.
http://www.wetterzentrale.de/pics/Rtavn1441.gif
http://www.wetterzentrale.de/pics/Rtavn3841.gif
THE GFS CONTROL The GFS control run follows a similar route to the operational in the short to mid term with changeable conditions in a Westerly flow but fails to bring High pressure into play in the longer term maintaining a changeable Westerly flow of weather with wind and rain at times, most prolific towards the North. Temperatures look like holding close to average in both runs with some milder than average days in the South and below average ones in the North as polar maritime air crosses at times.
THE GFS CLUSTERS The GFS Clusters show a lot of range in the long term this morning with the bias slightly held in favour of High pressure near the Azores and Low pressure to the North with Westerly winds over the UK with rain at times for many. The other options are based around the position of High pressure close to the UK either to the NE, East or West of the UK with much drier and settled conditions as a result.
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 this morning shows slightly changeable conditions next week as High pressure is tantalisingly close to the South of the UK but insufficiently so to prevent fronts to cross the UK from the West on occasion bringing some rain at times chiefly to the North and temperatures generally well up to average for early March.
http://www.wetterzentrale.de/pics/Rukm1441.gif
THE FAX CHARTS The Fax Charts show a broad and strong mild SW flow from the Atlantic over the next few days with a trough close to the NW. This persists for some time before a cold front crosses SE on Sunday and a more vigorous Low and troughs approach the West by early next week.
http://www.weathercharts.org/ukmomslp.htm#t120.
GEM GEM today also shows changeable conditions next week though High pressure never strays far away from the South of the UK with any rain reaching these parts lighter and patchier than that further North. Temperatures would be held close to average overall but rather mild in the South at times and somewhat chillier at times in the North behind cold fronts.
http://www.wetterzentrale.de/pics/Rgem2401.gif
NAVGEM NAVGEM this morning holds High pressure just to the South of the UK through next week, far enough South to bring a fresh to strong SW airflow across all areas at times and with troughs embedded in the flow some rain at times for all, heaviest in the North but some dry and brighter periods too.
http://www.wetterzentrale.de/pics/Rnvg1681.gif.
ECM ECM this morning shows changeable conditions too next week, especially over Northern areas as troughs periodically cross East bringing some rain for a time. Some of this could reach the South at times but amounts will be small and the underlying theme here would be for dry if rather cloudy skies in average temperatures close to High pressure to the South. Late in the run a strong European High is shown extending a ridge West to Southern Britain with the SW flow restricted to the far NW at that stage and dry, fine weather prevailing for many as a result.
http://www.wetterzentrale.de/pics/Recm2401.gif
ECM 10 DAY MEAN The 10 Day Mean Chart continues it's slow trend to push the axis of High pressure once shown over the UK and Scandinavia more and more to the SE and bringing the threat of Atlantic SW winds across the UK after the next week and towards the 10 day mark.
http://www.wetterzentrale.de/pics/Reem2401.gif
NOTABLE TREND CHANGES FROM PREVIOUS RUNS The slightly less anticyclonic synopses that was introduced between the models yesterday is generally maintained this morning with all areas at risk of occasional rain from weakening rain bearing fronts.
31 DAY HISTORICAL VERIFICATION STATS FOR GFS, UKM & ECM The current verification statistics for the past 31 days shows ECM leading the way at 3 days with 97.6 pts followed by UKM at 97.1 pts and GFS at 96.4. At 5 days ECM continues to lead the field at 90.3 pts over UKMO at 88.3 pts and GFS at 87.0. At 8 days ECM remains the leader with 67.0 pts over GFS's 60.2 pts. Then at Day 10 ECM retains superiority at 50.5 pts over GFS at 42.5.
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 Yesterdays trend towards slightly less High pressure dominated weather next week is at least part maintained between the models this morning as all are now showing High pressure squeezed further South than originally thought allowing more ingress across the UK of Atlantic winds and occasional troughs moving across from the West. With High pressure never far away to the South there looks to be little significant rainfall down here from such troughs with fine weather quickly returning after each weakening troughs passage. Things could be somewhat wetter at times to the NW though even here some drier spells could prevail at times. Temperatures look like being fairly respectable especially again over the South while polar maritime air could affect the North at times making it feel chilly here, Then we have to look further ahead and see what happens after next week with regard to the extension of High pressure influence or that of the Atlantic Westerlies and to be honest the jury is still out on that one with some Ensemble data suggesting that High pressure may migrate to Europe with the theme of somewhat colder air becoming invasive towards the UK from Europe or that the status-quo of High to the South and Low to the North is maintained with a mild Westerly themed outlook to persist. Which is right is anyone's guess at the moment but what is more certain is that no particularly aggressive weather is expected through the period with most days seeing us chasing areas of cloud and patchy rainfall or sunshine rather than anything more dramatic and on balance most areas will end up rather drier than average rather than wetter with temperatures holding average levels overall too.
Issued at 09:00 Thursday March 5th 2015
Martin G
Kilmersdon Radstock Bath Somerset