Heavy Weather 2013
23 November 2019 08:53:51

Originally Posted by: doctormog 

Yes, I think me need a few more days yet to get an idea of what early December holds. As it stands the options range from cool, to mild unsettled (possibly very mild) or more settled (with temperatures dependent of the location of any High).

Before then milder than recently and unsettled then something a bit cooler from the north - how cold or extensive remains to be eeen.


Quite agree, it’s very much steady as she goes. It’s a good position to be in. I’d rather be second guessing that staring down the barrel at long fetch westerly. That isn’t the form horse, whatever Shropshire would have us believe.


Mark
Beckton, E London
Less than 500m from the end of London City Airport runway.
JACKO4EVER
23 November 2019 12:00:09

Originally Posted by: doctormog 

Yes, I think me need a few more days yet to get an idea of what early December holds. As it stands the options range from cool, to mild unsettled (possibly very mild) or more settled (with temperatures dependent of the location of any High).

Before then milder than recently and unsettled then something a bit cooler from the north - how cold or extensive remains to be eeen.


absolutely, some interest maintained with a number of options on the table. In the nearer timeframes some more rain, possibly heavy on Tuesday to affect large parts of the country. 

Steve Murr
23 November 2019 12:05:07
Just to add my 2 pennies worth

If we look at all the attempts the models have made since October to portray a return to some sort of Normality & Zonal condition after T192 in reality they have all failed- & the transition time from that 192 forecast of mobility to somewhere around 168 morphing into 'blocked' is where we stand today.

As mentioned over on NW I am not expecting the models to move to a full blown Greenland High however in the mid term certainly getting much colder again Day 5-6 sees the -5 line reaching london ( remember thats 4/5 degrees colder than ave )

Post that the ridge is interesting- the current out put especially the GFS would have you believe that its going to flatten off quickly before zonal conditions set in after however the leap of faith here is that the ridge will be more vertical & the exit of the low from the states will be slower
The net fall out being some sort of wedge over Scandi assisting the cold air in situ over the UK with the -8c line approaching from the East....

Thanks
LA2B MeridFlowEuro09
23 November 2019 12:46:55

Update.


Watch this space.


Caveat.


There is still some amount of outcomes for day 6-8.


The Models are all over the place.


Different approach by the GFS, UKMO supports the GFS ICON and ECMWF at 144hrs.


What happens at 168, 192 and 216 is up for grabs.


If the Azores and Greenland Blocking asserts itself and we drag Cold air from the NE and then from Iceland, yeah it could bring cold weather for us.


Low Pressure moving up West and North Greenland and cold NE winds across the UK by GFS 00z is not supported by the Icon and UKMO for Friday at 144hrs.


Flat Azores high riding to our SW on Sunday to Tuesday can happen if ECMWF get’s it right, Low Pressure over NW Atlantic is what ECMWF shows at 00z, 192-216-240.  


But the Icon also has the long fetch SSW to NNE pointing double PV Low to fat West NW Atlantic towards SW of Greenland.


GFS Midrange has Cold PV Low Pressure dropping south over to our North and NE of UK and North to NE of Europe by day 7-9.  With Low Pressure going through West and North of Greenland on 00z GFS.


We need ECMWF ICON and UKMO to and GFS model to show some consistency.


Climate is warming up, Scotland and N Ireland and North England still often gets some Winter frost, ice and snow, November to March, but the SE and South UK including S Central England and Wales, together with the West and North through the year, they sometimes get more rain than London and S SE England, where some longer dry fine spells without much heavy rain is seen every year.

The North Atlantic Sea often gets some much Colder Wintry conditions from November to March Months, and Mild SW and South winds tend to be more frequent over the East and SE of North Atlantic Sea, as the Azores High tends to stay in charge. 

With this warmth and heat, the Central and South UK has become mostly free of snow and frost.
Bertwhistle
23 November 2019 13:23:10

Control, Op and mean all telling roughly the same tale out to about day 12.



Bertie, Itchen Valley.
'We'll never see 40 celsius in this country'.
Rob K
23 November 2019 13:28:50
Jet a long way south on the GFS 6Z by the end of the run. Cool wet westerlies, anyone?
Yateley, NE Hampshire, 73m asl
"But who wants to be foretold the weather? It is bad enough when it comes, without our having the misery of knowing about it beforehand." — Jerome K. Jerome
Steve Murr
23 November 2019 15:27:43
Look at how fast things can change with the 12z ICON !
❄️
Bertwhistle
23 November 2019 15:42:31

Originally Posted by: Steve Murr 

Look at how fast things can change with the 12z ICON !
❄️


Where is it, please?


Edit: found it Steve, thanks- although I can't see what you're hinting at; this one goes to T+120


Bertie, Itchen Valley.
'We'll never see 40 celsius in this country'.
doctormog
23 November 2019 16:15:44

Originally Posted by: Bertwhistle 


 


Where is it, please?


Edit: found it Steve, thanks- although I can't see what you're hinting at; this one goes to T+120



Meteociel have it up to 180hr currently on the 12z run


http://modeles.meteociel.fr/modeles/icon/run/iconnh-0-180.png?23-12



Shropshire
23 November 2019 16:36:07

Dreadful 12z unfolding with the energy going over the top.


 


From December 27th 2020, zonality will be banned from mixing with the UK. We appreciate that this may come as a shock to younger people and old Uncle Barty. This ban will last for a minimum of ten days.
Bertwhistle
23 November 2019 16:51:47

Originally Posted by: doctormog 


 


Meteociel have it up to 180hr currently on the 12z run


http://modeles.meteociel.fr/modeles/icon/run/iconnh-0-180.png?23-12




Thanks Doc; now that does look interesting, although the pressure gradient is worryingly slack- I sometimes feel that's uncertainty for us rather than a strategically placed col.


Bertie, Itchen Valley.
'We'll never see 40 celsius in this country'.
Steve Murr
23 November 2019 16:56:34
All the 3 afternoon runs GEM / ICON / UKMO have dumped the GFS idea of a fast progressive eastward motion..
doctormog
23 November 2019 16:59:44

Originally Posted by: Steve Murr 

All the 3 afternoon runs GEM / ICON / UKMO have dumped the GFS idea of a fast progressive eastward motion..


I thought the “12z” was dreadful?


Steve Murr
23 November 2019 17:06:44

Originally Posted by: doctormog 


 


I thought the “12z” was dreadful?



12z what?

doctormog
23 November 2019 17:12:13

Originally Posted by: Steve Murr 


 


12z what?



Don't ask me as that was my thought too. 


Steve Murr
23 November 2019 17:16:33

Lol - not sure.

*But* to highlight the 12z trend is 'west' with that bowling ball low over the NE states at 144.
GFS Ensemble mean at 138 following the 'trend' so there will be many more cold solutions for the UK at 192.

A key trend of the day. >>> Cold.

Shropshire
23 November 2019 17:42:45

Originally Posted by: doctormog 


 


I thought the “12z” was dreadful?



My comment was on the GFS which shows a sinking high from day 9.


From December 27th 2020, zonality will be banned from mixing with the UK. We appreciate that this may come as a shock to younger people and old Uncle Barty. This ban will last for a minimum of ten days.
DPower
23 November 2019 18:03:36
To sum up the 12z so far, gfs woeful, ukmo slightly better but would probably go the same way as the gfs and as for the other two models LOL. Icon has lost the plot completely and the gem similarish to ukmo. Apart from a couple of rather cold days perhaps theres nothing of interest for a cold weather lovers.
Things are pretty poor when the gem and icon are rolled out unless your wearing rose tinted glasses of course.
Brian Gaze
23 November 2019 18:03:51

Similar mix from the GEFS 12z. 



Brian Gaze
Berkhamsted
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"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
Brian Gaze
23 November 2019 18:06:12

The GEFS 12z stamps at 240 and 384. A quick glance to me suggests a high pressure bomb from the south continues to be the favoured option. Nonetheless that doesn't tie in with the Met O 30 dayer at the present time, so I emphasise uncertainty.




Brian Gaze
Berkhamsted
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"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
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