The Weather Outlook

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White Meadows
29 December 2018 20:09:02

If you ask me, I would say that in the grand scheme of things, prospects of a colder spell have taken a very slight turn for the better in the last day or so. The more unsettled spell that the MetO have been talking about doesn't appear to be as likely as it did a couple or so days back based on the trend of the last few ECM op runs.

Originally Posted by: David M Porter 

Agreed.

careful nit-picking of the long range tone also suggests reaffirmed confidence of a possible ‘somewhen’ January freeze.

Gandalf The White
29 December 2018 20:28:47

ECM ensembles suggest the op was supported well by the ensemble mean.

T+168 mean


Location: South Cambridgeshire

130 metres ASL

52.0N 0.1E



Gavin D
29 December 2018 21:02:18

The ECM mean suggests next week will be a very short snap it only just about makes it to -2 on the 850's as a peak low

graphe_ens3_php.thumb.png.6f94d09d34cb90c07f95a3d8c2d79535.png

Brian Gaze
30 December 2018 06:58:01

ECM is dish of the day if you're hoping for a cold spell.


Brian Gaze

Berkhamsted

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DEW
  • DEW
  • Advanced Member
30 December 2018 07:04:57

ECM is dish of the day if you're hoping for a cold spell.

Originally Posted by: Brian Gaze 

This and another northerly plunge appears on GFS too - but the thrust is always down through the Baltic, alas leaving us to pick up crumbs from the table.


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

Chichester 12m asl

ballamar
30 December 2018 07:29:56
ECM looking good this morning hopefully will get some clear air trapped under the high for a frigid start to January
JACKO4EVER
30 December 2018 08:00:24
Some runs with cold hitting Europe but sadly we appear to be on the fringes. All to play for I suppose.
marting
30 December 2018 08:25:02
ECM again on the top warm side of its ensembles. Such differences in the runs at 192 hours

Martin


Martin

Greasby, Wirral.

Sasa
  • Sasa
  • Advanced Member
30 December 2018 09:10:20
ECM has runs which are still of interest whereas GFS is keen to collapse the High SE

http://www.wetterzentrale.de/maps/ECMOPEU00_240_1.png 

I am going skiing for February half term and genuinely worried that for the first time I will be skiing on the artificial snow. Even if ECM is correct western Europe and the Alps would not see any precipitation.


Kingston Upon Thames
Gavin D
30 December 2018 09:18:37

The ECM 850s mean peaks with a low of around -2 on Wednesday it then rises up to around +5 on Saturday and then drops away again to around -1 circa 8th/9th

london_ecmsd850.thumb.png.f4abe0ac2e6667218a0d843410fcff32.png

Shropshire
30 December 2018 09:20:37

Big differences between the GFS and ECM as others have pointed out but with the METO and BBC still talking about it becoming unsettled from the NW in around 8 days, then I'm backing the GFS outcome for now.

 


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Solar Cycles
30 December 2018 09:23:54
Let’s hope the ECM is on the ball here and we can at least get something more akin to seasonal weather for the time of year.

Until we can get clarification on whether the UK high builds northwards or sinks SE then it’s pretty pointless looking beyond the end of next week.

Broadmayne Blizzard
30 December 2018 09:42:41

Big differences between the GFS and ECM as others have pointed out but with the METO and BBC still talking about it becoming unsettled from the NW in around 8 days, then I'm backing the GFS outcome for now.

 

Originally Posted by: Shropshire 

That Meto/BBC outlook will soon change if the ECM holds its position. The Meto give little if any credence to the GFS and why would they when the ECM and their own model consistently outperform it 


Formerly Blizzard of 78
David M Porter
30 December 2018 09:45:02

Big differences between the GFS and ECM as others have pointed out but with the METO and BBC still talking about it becoming unsettled from the NW in around 8 days, then I'm backing the GFS outcome for now.

 

Originally Posted by: Shropshire 

I imagine though Ian that were it the case that the MetO was predicting a longer lasting settled period which ECM shows but GFS was going for the more unsettled one, you would probably say that you'd be expecting the MetO to alter their forecast to reflect what GFS was showing.

As Gandalf & I mentioned last night, it was only a couple of weeks or so back when GFS was shown to be too quick in bringing in the atlantic. This eventually did happen when Storm Deirdre arrived on 15th Dec, but there was a point when GFS had the atlantic returning a number of days earlier than this. In view of this, it would IMO for anyone to assume that GFS has what happens from the end of next week onwards nailed.


Lenzie, Glasgow

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

Hippydave
30 December 2018 09:50:55

After the initial quieter HP spell the GFS has flipped back flatter in the long term again today, with only the odd colder solution. The Op manages to sink the HP, which then throws up repeated ridges allowing for some short lived shots of chilly PM air as LPs pass by, alternating with the mild, wetter stuff.

ECM looks reasonable for some quiet colder stuff, once the HP moves enough to allow colder air to be drawn in. No real signs of the HP sinking on ECM so chilly or cold once the current milder air gets washed out.

All in all still no concrete signs of a cold spell but hints of how we could get one (P11 on the 00z GFS clearly has things sussed). 

It'll be interesting to see if colder weather (i.e sub -5 850s and some snow around) does materialise or whether we just end up with a benign mix of quiet chilly HP with some milder wetter interludes.

At the moment things are starting to feel a little like the potential of something more wintry is always just being nudged out of reach but still plenty of time left before it's time to give up on the cold rainbows and start looking for spring

 

Edit - probably should clarify the GFS still manages to inject some colder air for a time under the HP, leading to 3-4 days of chilly weather down here at least, not really checked re places North!


Home: Tunbridge Wells

Work: Tonbridge

White Meadows
30 December 2018 10:06:28
A step away from notable cold into Jan this morning.

http://www.weersite.net/?actueel&ensemble&ecmwfpluim 

NAO index doesn’t appear to look primed for anything either. Still, all to play for yet much ado about nothing?

http://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao_index_mrf.shtml 

Gandalf The White
30 December 2018 10:47:24

GFS still chopping and changing with every run once you get out 7-10 days.

06z throws up a retrogression of upper heights and associated surface high pressure and delivers a potent northerly before the jet starts to exert pressure on the brief block


Location: South Cambridgeshire

130 metres ASL

52.0N 0.1E



tallyho_83
30 December 2018 10:55:03

GFS still shows nothing wintry or cold and wants to break down the ridge, where as the ECM shows the HP move northwards by day 10:

Quite a difference

 

 

GFS 06Z

 


Home Location - Vixen Tor Close, Okehampton, Devon (221m ASL)

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Sean Moon

Magical Moon

www.magical-moon.com

Gary L
30 December 2018 11:04:00

Clearly some conflict between the shorter term operational models and signals from the medium range output the met office have. They have persistently gone for colder weather later in the medium range forecast period but this has not materialised. Is it just a waiting game? Who knows! 

marting
30 December 2018 11:11:09
GFS has flipped massively in the 06z run, with high pressure dominating as per ECM. Will it still be that way in 6 hours🤔😂

Martin


Martin

Greasby, Wirral.

ballamar
30 December 2018 11:38:27
GFS showing its consistency again, love to place all my faith in that model
marco 79
30 December 2018 11:42:26
Heights build over the Arctic during next weekend (06z 500hpa)....but with a lot of energy to our NW and NE the window of opportunity at this moment in time seems limited ....all ten days out though...
Home : Mid Leicestershire ...135m ASL
Brian Gaze
30 December 2018 11:58:14

GFSP offering a buy 1 get 1 free on pizza this morning. Not sure how long the offer will be valid.


Brian Gaze

Berkhamsted

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Gandalf The White
30 December 2018 12:05:59

GFSP offering a buy 1 get 1 free on pizza this morning. Not sure how long the offer will be valid.

 

Originally Posted by: Brian Gaze 

Possibly until tea time.

 


Location: South Cambridgeshire

130 metres ASL

52.0N 0.1E



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