HERE IS MY LATEST ANALYSIS FROM THE OUTPUTS OF THE WEATHER COMPUTER PREDICTION MODELS FOR TWO WEEKS FROM 8PM TODAY TUESDAY AUGUST 12TH 2014.
NEXT EXCLUSIVE 'MY THOUGHTS' UPDATE ON MY WEBSITE FROM 22:00HRS TONIGHT
THE CURRENT GENERAL SITUATION. A deep Low to the NE of Scotland will fill slowly and edge away to the NE. A showery Westerly flow over the UK will be maintained.
MODELS-2 WEEK HEADLINE Changeable and sometimes windy and cool with showers and some longer outbreaks of rain at times. Perhaps drier across the South later.
THE JET STREAM FORECAST The Jet Stream Forecast shows the flow continuing to blow strongly across Northern France before weakening but maintaining a general path East across the Atlantic and the British Isles. the flow becomes more fragmentary later and less well defined.
GFS The GFS operational today generally maintains a changeable and sometimes rather cool theme as this week's cool and showery theme in NW winds give way to a drier interlude over the South at the weekend. through next week a vigorous Low pressure is shown over Southern Britain with wind and rain as a result before it moves slowly away NE and in its wake comes a rise of pressure albeit slowly with warmer and drier weather easing north as a result. The GFS Ensembles show an endorsement to the operational with just a difference in positioning in High pressure at the end of the run which is too far out to comment on confidently.
UKMO UKMO this morning show new Low pressure easing down to the North early next week with the better weekend giving way to further cool weather with rain and showers in blustery west winds to start next week.
THE FAX CHARTS The Fax Charts show a weakening showery WNW flow through the rest of the working week with a ridge of high pressure covering many areas at the weekend.
GEM The GEM operational today shows a fine and warmer weekend across the South extending into next week too here while the North and West in particular shows more unsettled and breezy weather returning from the Atlantic with rain at times.
NAVGEM NAVGEM has a brief respite from the showers at the weekend as a ridge of high pressure crosses through before a Low pressure bekt edges down from the NW early next week with the return of wind and rain at times for all.
ECM The ECM operational this morning maintains a basically cool and showery theme throughout it's run this morning with Low pressure close to the North and NE of the UK throughout with a cool West or NW flow carrying showers through at times plus the odd spell of more prolonged rain. There will of course some pleasantly dry and brighter interludes as well but it never looks like being overly warm.
NOTABLE TREND CHANGES FROM PREVIOUS RUNS There are no definitive changes of trend shown between the models from what was being shown yesterday.
MY THOUGHTS Through the outlook period this morning it looks like that changeable weather will persist across all areas of the UK with rain at times in an often cool West or NW breeze. Some output shows another vigorous Low pressure close to the UK around the middle of next week which would bring about a new spell of wet and very windy weather. Others including the well respected ECM tend to prefer a continuation of Low pressure NE of the UK with cool and showery NW winds. There is a hint of more High pressure from some output building North across the UK later in week 2 but at this range this feature is very embryonic and will need to come much closer to the reliable timeframe as well as spread through other output to guarantee it occurring.
Martin G
Kilmersdon Radstock Bath Somerset