UK meteorology

Undulations are always suspect !

JohnnyO. o/
They can be beautiful, however:
361FC56000000578-3683168-image-m-24_1468152180776.jpg
 
Excellent photo Chris, I think to be British and not appreciate cloudscapes would be like living without part of your soul.
Not my photo, unfortunately, but thanks for the comment, Colum, and I agree regarding cloudscapes, albeit our most common type is what I have at the moment - grey stratus. Anyway, here's a quote from a respected Netweather member (ex-Met Office employee albeit not a professional forecaster) on his thoughts (BTW, WAA stands for Warm Air Advection - horizontal movement with respect to the Earth's surface of warm air, usually northwards):

Today will be cloudy and wet fairly windy in many areas as a cold front tracks south across England and Wales clearing the south coast by afternoon apart from this neck of the woods where it may well linger. Heavy showers in N.Ireland and particularly NW Scotland but the good news is eastern Scotland will probably have the best of the weather today with plenty of sunshine.

Things improving and quietening down overnight and into tomorrow apart from northern Scotland where more persistent rain will move in and quite windy as well.



So on to this morning's gfs. After some transient ridging tomorrow and Monday the next Atlantic low tracks north east to be over Iceland 983mb with the associated fronts already impacting N. Ireland and north west Scotland. These track south east across Britain, along with a little wave that has developed, to be over Denmark by 18 so the rain soon clears.



The usual story then continues to unfold with the next deep low 964mb arriving Iceland in the early hours of Wednesday bringing more rain to the north but probably light showery stuff further south in the quite strong westerly wind. At this point the upper trough to the NW is still dominant, suppressing the Azores HP resulting in a strong westerly gradient.



From this point a shift of the upper pattern takes place with amplification resulting in the trough realigning in the western Atlantic and the high pressure to ridge in the vicinity of the UK. Thus the fronts from the next deep low that is pushed west of Iceland grind to a halt just west of the UK. One result of this scenario would be some WAA into the UK on the southerly drift and temps in the low 20sC in the south of England. But the surface high cell is not anchored in the east and after a passage of a weak front the high pressure realigns from the south west.



So essentially a changeable picture but very much a NW/SE split next week but although probably generally fairly cloudy not much rain around (apart from the NW) and quite warm at times. Having said that I certainly wouldn't bet the farm on any development after midweek.
 
Anyway, here's a quote from a respected Netweather member...
...Who has just posted regarding the output from one of the other deterministic models:
The ecm disagreeing with the gfs as early as Weds where it tracks the main low further to the north east and has it south east of Iceland by 06 Weds with the associated fronts impacting the north bringing heavy rain and gales, They clear quickly into Scandinavia but Weds is a wet and windy day for all with heavy showers post frontal passage. The general theme from here is not dissimilar to the gfs (and the anomalies) of amplification of the trough in the western Atlantic and the HP in the vicinity of the UK which indicates a quiet and dry spell for all apart from, as usual, the north on occasion. Temps generally not too bad
 
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