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 OCT 8TH 2015
THE CURRENT GENERAL SITUATION A ridge of High pressure will lie across the UK over today and tomorrow.
http://www.wetterzentrale.de/pics/Rtavn001.gif
CURRENT SNOW LYING UK AND NORTHERN HEMISPHERE There is currently no snow lying in the UK with the freezing level at just under 5200ft in the far West and NW and close to 8200ft in Eastern England.
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 mostly fine and settled with frost and fog patches at night. Perhaps more unsettled and colder later.
THE GFS JET STREAM FORECAST The GFS Jet Stream Forecast shows the southern arm of the currently split flow dissolving over the coming days as the Northern arm strengthens somewhat up to the NW and blows NE to the NW of Scotland. then later in the flow part of the flow dives South across the UK at times as Low pressure to the NE diverts it at times.
http://www.netweather.tv/index.cgi?action=jetstream
GFS OPERATIONAL The GFS Operational Run today shows the weather being influenced by High pressure to the East across the UK over the next week as a ridge extends West from it across northern areas with a chilly east flow across the South. Very little if any rain is likely and Week 2 looks pretty good too as High pressure influence transfers to coming from the West of the UK maintaining a ridge across us. Winds then settle to come from the North late in the period with a cold Northerly blast bringing some wintry showers towards the North and East at the end of the period.
http://www.wetterzentrale.de/pics/Rtavn1441.gif
http://www.wetterzentrale.de/pics/Rtavn3841.gif
THE GFS CONTROL The theme of the GFS Control Run shows much High pressure dominance across the UK throughout the run. This comes in the shape of a ridge lying across the UK for the next week with the Easterly flow across the South just unstable enough for a time to give the risk of a few showers towards the SE. Then in Week 2 High pressure develops right across the UK with much fine and settled weather for all though with the twin hazards of fog and frost almost anywhere likely through Week 2, slow to clear in places
http://www.meteociel.fr/modeles/gefs_cartes.php
THE GFS CLUSTERS(14 Days) The GFS Clusters in 14 days has maintained a majority bias towards High pressure lying close to or to the West and SW of the UK with fine weather for many though there are more options this morning with more of an Atlantic based period by that time with some rain at times on a Westerly wind especially over the North.
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 stretching West from an European High pressure, lying across the UK from the East into next week and giving rise to fine and dry weather for many with frost and fog at night in the North but with a chilly Easterly flow maintained across the South making daytime weather feel cool but allowing an avoidance of much in the way of frost and fog here by night.
http://www.wetterzentrale.de/pics/Rukm1441.gif
THE FAX CHARTS The Fax Charts this morning illustrate domination of a High pressure block to the East and NE maintaining a ridge West across the UK keeping any cloud and rain bearing weather systems well away from most of the UK, well to the West, NW and South.
http://www.weathercharts.org/ukmomslp.htm#t120
GEM GEM has High pressure ridged over the UK from the East over the next week with fine and settled weather for all areas. On this run there is less strength to the Easterly flow in the South as the axis of the ridge is more to the South than some other output. This means the far North could see a little rain especially late in the run when an attack from the North brings cloud and rain and cold weather South to most areas towards Day 10.
http://www.wetterzentrale.de/pics/Rgem2401.gif
NAVGEM NAVGEM follows the theme of the rest with dry and fine weather developing from today with High pressure slow moving across the North of the UK either in the shape of a ridge or under a cell of High pressure itself with fine and dry weather for all with a keen East breeze in the South and frost and fog night and morning over the North.
http://www.wetterzentrale.de/pics/Rnvg1681.gif
ECM ECM this morning is broadly similar to the rest of the output until later in the period when a hiatus in the fine weather could develop later next week as a trough bisects High pressure East and West of the UK with some rain for a time with an attack from the North introducing a change in weather type at or soon after the termination of the run for most of the UK.
http://www.wetterzentrale.de/pics/Recm2401.gif
ECM 10 DAY MEAN The ECM 10 Day Mean Chart from last night indicates the UK lying in slack pressure between High pressure both to the SW and NE and Low pressure to the NW and to a lesser extent to the SE with the weather likely to be mostly quite benign across the British Isles but with some rain at times towards the North and West and perhaps a shower or two elsewhere.
http://www.wetterzentrale.de/pics/Reem2401.gif
NOTABLE TREND CHANGES FROM PREVIOUS RUNS There is very good agreement on fine and settled weather for the UK under a ridge for most of not all of next week with any distant changes looking most likely to come from the North somewhen in Week 2.
31 DAY HISTORICAL VERIFICATION STATS FOR GFS, UKMO & ECM The verification Statistics of GFS, UKMO and ECM show at 24 hours ECM tying with UKMO at 99.5 pts with GFS closely behind at 99.4 pts. At 3 days ECM is leading with 97.1 pts to UKMO's 96.9 pts while GFS lags behind at 95.9 pts. At 5 days ECM leads with 87.8 pts to UKMO at 87.0 pts then GFS at 83.8 pts. Then at 8 Days ECM still leads at 57.6 pts over GFS's 50.0 pts. Finally at Day 10 ECM leads GFS at 35.4 pts to 32.0 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 The weather looks like becoming set fair across the UK over the next week or so at least and maybe longer. Any remaining showers left over as a legacy to the recent unsettled period will finally decay by tomorrow with High pressure building across the UK from the East and delivering bundles of fine and bright weather for all areas. As usual this means sunny spells by day but those same clearer spells by night will likely give rise to plenty of frost and fog patches by night in the North. There looks likely to be slightly different conditions in the South as an Easterly flow looks likely to develop restricting any frost and fog patches to places with good shelter but also making it feel chilly by day in exposure. This general weather pattern looks likely to persists for most if not all of next week before some output, namely GEM, GFS and ECM all point towards the North for what may be a pattern shift away from High pressure to something more unsettled and possibly cold as winds look like they could turn Northerly later. In the meantime we should all be able to enjoy a protracted spell of fine and settled weather with very little in the way of rain, some sunny spells with some frost and fog patches at night, a chilly east wind in the South and perhaps a shift towards something more unsettled and chilly much later in the second week.
WORST CHART OF THE DAY 00z RUN
http://www.wetterzentrale.de/pics/Rgem2401.gif
I have chosen to show another GEM 10 Day chart as the worst chart of the day as it highlights my above text summary in bringing Low pressure down from the North in 10 days or so bringing an end to the fine weather as cloud, wind, rain and potentially cold weather moves down across all areas at that time, but will it happen?
BEST CHART OF THE DAY 00z RUN
http://www.wetterzentrale.de/pics/Recm1441.gif
The best chart today goes to GFS in it's operational run at Day 6 which shows High pressure stretched across the UK and nearby NW Europe with fine and settled Autumn weather continuing for some time from this point for the UK.
Next update from 09:00 Friday Oct 8th 2015
Martin G
Kilmersdon Radstock Bath Somerset