The Weather Outlook

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nsrobins
04 November 2017 11:19:35

To my untrained eye, the Atlantic high appears to want ridge north towards the Arctic high which seems to be more persistent and wanting to stay around. Before they hold hands, it needs a gap in the succession of depressions moving through Iceland.
http://old.wetterzentrale.de/pics/Rtavn2401.gif

Conditions and set up at the moment seem more typical from many many years ago, before something changed during the seventies.

Originally Posted by: Phil G 

If something changed in the 70s then I’m all for change - the winters of 77/78, 78/79 and 81/82 were brilliant down here.


Neil

Fareham, Hampshire 28m ASL (near estuary)

Stormchaser, Member TORRO

Hungry Tiger
04 November 2017 14:34:05

Just read Gavin Ps forecast. Seems like cold then mild and then cooler and then mild.

Nothing to get excited about.

 


Gavin S. FRmetS.

TWO Moderator.

Contact the TWO team - [email protected]

South Cambridgeshire. 93 metres or 302.25 feet ASL.



Bertwhistle
04 November 2017 16:57:41

Just read Gavin Ps forecast. Seems like cold then mild and then cooler and then mild.

Nothing to get excited about.

 

Originally Posted by: Hungry Tiger 

I agree HT; classic Atlantic ridge-trough, zero 850s-5 850s stuff. Could be quite manky, even in the south.


Bertie, Itchen Valley.

Retire while you can still press the 'retire now' button.

DEW
  • DEW
  • Advanced Member
05 November 2017 07:50:23

GFS picked up the present cold-ish spell 10 days out, though in true GFS fashion they overcooked it (or should that be underfroze?)

Let's see how well they do with this one for 16 Nov

http://www.meteociel.fr/modeles/gefs_cartes.php?code=0&ech=276&mode=0&carte=

Until then the major models agree on anticyclonic conditions, so frost and fog - maybe a little snow over the Scottish mountains, e.g.

http://www.meteociel.fr/modeles/ecmwf.php?ech=120&mode=1&map=0&type=0&archive=0

 


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

nickl
05 November 2017 09:39:56
I have a feeling of deja vu making this post in November but the n aisian blocking on the extended ens output looks pretty notable. its already forcing the jet onto a nw/se axis promoting a mean euro trough so it's not like we aren't seeing its effect already playing out on the mid term modelling. With the Azores ridge ebbing and flowing the consequences for nw Europe are varied but carry plenty of potential re a seasonal start to winter.
The Beast from the East
05 November 2017 12:00:06

It seems the familiar pattern in modern times continues again this season -  of blocking unable to take hold in a favourable location for any length of time

 


Purley, Surrey, 70m ASL

"We have some alternative facts for you"

Kelly-Ann Conway - former special adviser to the President

Bertwhistle
05 November 2017 15:57:01

The arpege model is offering subzero, even this far south, early tomorrow morning.


Bertie, Itchen Valley.

Retire while you can still press the 'retire now' button.

White Meadows
05 November 2017 17:20:47

It seems the familiar pattern in modern times continues again this season -  of blocking unable to take hold in a favourable location for any length of time

 

Originally Posted by: The Beast from the East 

but it’s only early November?

Bertwhistle
05 November 2017 17:23:37

Check out the FI in the 12z GFS op: it's as juicy as a Cantabrian peach. Look at the pptn type! (Can't get the link sadly, so be quick- in case it...well... you know.


Bertie, Itchen Valley.

Retire while you can still press the 'retire now' button.

David M Porter
05 November 2017 17:23:50

It seems the familiar pattern in modern times continues again this season -  of blocking unable to take hold in a favourable location for any length of time

 

Originally Posted by: The Beast from the East 

We're only at the 5th of November Beast- too early to be making any judgements yet IMO.

It's worth remembering what November '09 was like throughout, yet the setp-up we had for the duration of that month bore virtually no resemblance to the pattern that dominated the 09/10 winter.


Lenzie, Glasgow

"A body of men holding themselves accountable to nobody ought not to be trusted by anybody." โ€“ Thomas Paine

Solar Cycles
05 November 2017 17:59:56
Some interesting charts on offer as we delve into the latter reaches of FI and for once itโ€™s not just the GFS usual dangled carrot on offer. The NH profile looks very encouraging in the 7-10 day timeframe and talk of split vortexes and retrogressing heights as we head into the final third of the month could be gathering momentum. As ever itโ€™s a case of watch this space, or in Blightys case so near yet so far. ๐Ÿ˜
some faraway beach
05 November 2017 18:24:39

Polar view 5 Nov. 2009, polar vortex under heavy attack from Asia and split left to right (yippee!):

5 Nov. 2015 ( a random lousy winter), polar vortex in full swing (uurgh):

Today - polar vortex a mess, split from ... well. just split:

As Solar Cycles says, at the very least this is going to be giving us some interesting charts to look at in the coming weeks. 


2 miles west of Taunton, 32 m asl, where "milder air moving in from the west" becomes SNOWMAGEDDON.

Well, two or three times a decade it does, anyway.

doctormog
05 November 2017 18:28:10
I guess it is one small piece of a very complex jigsaw, but at least it is one piece!
Solar Cycles
05 November 2017 18:39:24

I guess it is one small piece of a very complex jigsaw, but at least it is one piece!

Originally Posted by: doctormog 

Indeed and compared to some previous winters actually having a piece of the pie is better than none at this moment in time. The MetO updates will be of interest over the coming days in seeing which way they see things panning out.

Phil G
05 November 2017 23:11:51
Bit early but building blocks and all that.

Quite like this chart which shows signs of good blocking out to the North East.

http://old.wetterzentrale.de/pics/Rtavn2401.gif 

Gandalf The White
05 November 2017 23:55:20

Bit early but building blocks and all that.
Quite like this chart which shows signs of good blocking out to the North East.

http://old.wetterzentrale.de/pics/Rtavn2401.gif

Originally Posted by: Phil G 

I find that map format misleading: that 'block' is the same distance from our shores as Newfoundland.


Location: South Cambridgeshire

130 metres ASL

52.0N 0.1E



Solar Cycles
06 November 2017 00:04:05

 

I find that map format misleading: that 'block' is the same distance from our shores as Newfoundland.

Originally Posted by: Gandalf The White 

I always find the NH profile to be the best at deciphering the path ahead.

Solar Cycles
06 November 2017 00:23:26
This posted by CC over in tโ€™other channel who does post here from time to time but highlights perfectly what we need to be aware of as we head into the business part of the silly season.

CreweCold

Usually with the sort of charts on offer in the circa day 10 timeframe, I'd be getting a bit giddy. That is one huge Siberian HP and is usually a harbinger of all things winter. However, I have a nagging feeling we'll see the 'pretty patterns' of the progged shredded vortex dry up pretty sharpish as we head towards December. We need to see warmings of the strat if we're to prevent the upper strat uniting with the trop to bring the usual December dirge.

Unfortunately there is little sign of this at the moment. So those getting carried away may want to keep their excitement in check. It's pertinent to note that most of the 'legendary' years kicked of with a Canadian warming early doors...

Last year served as a lesson to us all just how quickly the trop vortex can ramp up once zonal winds increase.

DEW
  • DEW
  • Advanced Member
06 November 2017 07:34:07

Looks as if the Alps may be getting some early snow for once

http://www.wxmaps.org/pix/temp4.html

 


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

ballamar
06 November 2017 09:18:27
briggsy6
06 November 2017 09:55:51

Wow. Is that an example of the famous Omega block - one of the holy grails for those looking for cold and snow in winter?


Location: Uxbridge
Hungry Tiger
06 November 2017 10:53:38

https://www.theweatheroutlook.com/twodata/gfs.aspx?run=00&charthour=384&chartname=mslp500&chartregion=na-region&charttag=500hPa%20GPDM

I know miles off unlikely but very nice chart - 2010 anyone ๐Ÿ˜€

Originally Posted by: ballamar 

Plenty of evidence of the Greenland High there. That may have implications.

 


Gavin S. FRmetS.

TWO Moderator.

Contact the TWO team - [email protected]

South Cambridgeshire. 93 metres or 302.25 feet ASL.



Russwirral
06 November 2017 11:08:19

Another remarkable FI here...

Unlike past years though - i refuse to get carried away.  The models of recent years have been really good at saying what we could have had.  whilst the actual weather delivers stuff nothing like FI.

Netweather GFS Image


Gandalf The White
06 November 2017 12:13:07

 

Plenty of evidence of the Greenland High there. That may have implications.

 

Originally Posted by: Hungry Tiger 

The way the WAA pushes due north to set up that block is quite unusual. It’s an indicator of a proper block because there’s no evidence of the jet putting pressure on the WAA as it balloons up and creates the upper heights.

If you were picky you’d like to see lower heights over the Azores but it’s an interesting evolution.

 


Location: South Cambridgeshire

130 metres ASL

52.0N 0.1E



nickl
06 November 2017 13:28:24

I always find the NH profile to be the best at deciphering the path ahead.

Originally Posted by: Solar Cycles 

 

always in October/November (especially first three weeks) - the micro picture isn't nearly as relevant as the macro for those looking ahead to winter proper.

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