HERE IS MY LATEST ANALYSIS USING DATA SUPPLIED BY THE NWP OUTPUT COVERING 5 OF THE WORLDS MOST POWERFUL WEATHER COMPUTERS ISSUED AT 09:00 ON THURSDAY MAR 10TH 2016
THE CURRENT GENERAL SITUATION A weakening occluded front will lie across the East of the UK weakening further through the day as pressure rises strongly across the UK. Further weak fronts will approach the NW later tonight and tomorrow.
http://www.wetterzentrale.de/pics/Rtavn001.gif
CURRENT SNOW FORECAST AND FREEZING LEVEL OVER THE UK The freezing level across the UK will rise over the next few days especially across the North and West where the generally close to 3000ft freezing level across the SE will rise above 5000ft across NW Britain tomorrow. As a result no snow is expected across the UK today.
http://www.snow-forecast.com/maps/dynamic/uk
http://www.natice.noaa.gov/pub/ims/ims_gif/DATA/cursnow.gif
MODELS-2 WEEK HEADLINE Becoming less cold and mostly dry with some sunshine by day and frost at night. Perhaps becoming less settled again later.
THE GFS JET STREAM FORECAST The Jet Stream is expected to turn North towards Icland across the Atlantic over the coming days as pressure builds across the UK. the flow remains well NW for a time while the Southern arm of the flow becomes more influential to the UK as it migrates further North later next week in association with falling pressure. The flow becomes more variable for a time before reverting to a flow well South of the UK again is projected late in the period.
http://www.netweather.tv/index.cgi?action=jetstream
GFS OPERATIONAL The GFS Operational Run today shows pressure rising across the South of the UK over the next few days as Low pressure over the South subsides away South. A belt of High pressure then lies in a belt across Southern Britain by the weekend while the North sees milder SW winds and all areas will feel the benefit of milder air for a time. Next week then shows High pressure to the east and SSE winds maintaining quite mild weather ahead of fronts bringing a change to rain at times by the second week. Through that week a change again to cold and unsettled weather is shown as Low pressure slips to the South of the UK with rain turning to snow over hills and frosts at night possible once more.
GFS CONTROL RUN The theme of the Control Run shows a very similar trend to the Operational again this morning although it strengthens the theme towards cold easterly winds greater than the operational in week 2 as Low temperatures flood SW over Northern Europe and engages with Low pressure developing to the South and SW of the UK with some late March snow for many should it verify.
http://www.wetterzentrale.de/pics/Rtavn1441.gif
http://www.wetterzentrale.de/pics/Rtavn3841.gif
http://www.meteociel.fr/modeles/gefs_cartes.php?code=0&ech=144&mode=0&carte=0
http://www.meteociel.fr/modeles/gefs_cartes.php?code=0&ech=384&mode=0&carte=0
GFS ENSEMBLE DAY 14 DATA The GFS Clusters once again today look very undecided on what the UK will lie under in two weeks time as all sorts of options are shown ranging from Low pressure across the UK with rain at times and much slacker pressure areas with benign weather and others with Low pressure to the South or SW bringing somewhat colder conditions.
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 The UKMO model this morning shows sustained High pressure building across Southern Britain in the next few days and extending slowly North later as it later rests over the North Sea. Milder air will engulf the UK for a while before temperatures ease back a little in the South later as an ESE breeze develops here but on the whole dry, fine and bright weather is expected by next week for all.
http://www.wetterzentrale.de/pics/Rukm1441.gif
THE FAX CHARTS From the Fax Charts this morning it would appear that substantially mild air is going to struggle to get down across the Southeast of the UK as a warm front introducing it continues to straddle the middle of the UK over the weekend. So while the North and West become milder with some rain at times in the far NW the South and East look like staying dry if rather cloudy and somewhat cooler than originally thought. Brighter conditions look like slowly extending NW early next week.
http://www.weathercharts.org/ukmomslp.htm#t120
GEM GEM this morning keeps the UK locked under High pressure centred close to or for most of the time over the UK with fine and at times sunny weather though with frosts at night. With light winds and reasonable uppers March sunshine should lift daytime temperatures to average if not a bit above whereas frosts at night are likely too. At the end of the 10 day period pressure is shown to leak away SE with Atlantic fronts moving in from the West later.
http://www.wetterzentrale.de/pics/Rgem2401.gif
NAVGEM NAVGEM once developed holds High pressure close to the NE of the UK before slipping it gently South down the North Sea next week with winds turning more Southerly later and maintaining fine and in places mild weather through the week.
http://www.wetterzentrale.de/pics/Rnvg1681.gif
ECM ECM today is a very settled one again with High pressure extending across Southern Britain in the next few days time and then extending to all of Britain over the weekend and beyond as the High centre lies close by. Some bright Spring sunshine looks very likely for many with some frosts at night but temperatures by day would be close to average if not above overall but with some frosts under clear skies at night. At the very end of the run High pressure is shown to leak away to the SE with unsettled conditions looking likely to develop soon after Day 10.
http://www.wetterzentrale.de/pics/Recm2401.gif
ECM 10 DAY MEAN The 240hr mean Chart this morning continues to project a High pressure ridge likely to be lying across the UK in 10 days with fine and settled conditions in light winds most probable.
http://www.wetterzentrale.de/pics/Reem2401.gif
NOTABLE TRENDS & CHANGES FROM PREVIOUS RUNS The trend is well set for the weather to become fine, settled and less cold from the latter end of the week with solid cross model support for High pressure to build across or remain close to the UK for some time.
31 DAY HISTORICAL VERIFICATION STATS FOR GFS, UKMO & ECM The verification Statistics of GFS, UKMO and ECM show at 24 hours ECM ahead at 99.6 pts with UKMO at 99.5 pts and GFS at 99.4 pts. At 3 days ECM is leading with 97.7 pts to UKMO's 97.1 pts while GFS lags behind at 96.4 pts. At 5 days ECM leads with 91.2 pts to UKMO at 89.3 pts and GFS at 86.9 pts. Then at 8 Days ECM has the leading spot from GFS with 66.0 pts to 61.6 pts. Finally at Day 10 ECM has regained the lead from GFS with a score of 47.3 pts to 45.8 pts.
http://www.emc.ncep.noaa.gov/gmb/STATS_vsdb/allmodel/daily/cor/cor_day1_PMSL_MSL_G2NHX.png
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.png
MY THOUGHTS Changes since yesterday morning are small with regard to the prospects of a sustained and very welcome dry and settled spell of weather for all parts of the UK. With yesterday's inclement Low pressure well out of the way now the pressure is building strongly and will continue to rise over the coming few days so that a belt of High pressure from a centre near Denmark or Germany will keep Southern Britain fine and dry. In the NW we may have to wait a little longer as weak Atlantic fronts carry light rain and mild air across for several more day. However, as the High inches NW and North next week all areas become under the influence of it and this means we should all share in a lot of dry, bright and fine days with average or above average temperatures while nights are chilly with frosts in places where skies stay clear. It's not until the second week when cracks appear in this pattern with some output sliding High pressure away to the South and SE with the Atlantic winds returning or GFS which seems to favour a return to cold conditions as a cold plunge of Arctic air moves South over Europe and is steered SW towards the UK engaging with falling pressure to the South and SW with the threat of snow in places. While it does seem a repeating trend between runs I think the GEM, NAVGEM and ECM route this morning is the more likely one with a gentle return to less settled conditions with some rain at times more likely as we enter the latter stages of the month.
Next Update Friday March 11th 2016 from 09:00
Martin G
Kilmersdon Radstock Bath Somerset