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David M Porter
24 December 2014 21:43:50

I know it's Christmas (nearly), but can we keep the thread on topic please. Cheers.


Lenzie, Glasgow

"Let us not take ourselves too seriously. None of us has a monopoly on wisdom, and we must always be ready to listen and respect other points of view."- Queen Elizabeth II 1926-2022
Hade Edge Snowman
24 December 2014 21:57:35


 


well, we couldn't rely on what Mr Fish told us, especially in 1987


Originally Posted by: Jayni C 


October by any chance


Hade Edge Snowman
West Yorkshire
1060 feet/323 metres ASL
Sevendust
24 December 2014 22:08:33


 


you need leather skin for this hobby!! ...and the patience of Saint 


Originally Posted by: White Meadows 


Never found Saint that patient tbh


You forgot the plastic sheeting on the chairs btw


Still quite relaxed about the next week or so. Certainly not buying into the more extreme scenarios we've seen as I've been there many times before

briggsy6
24 December 2014 22:27:32

Well Merry Crimbo one and all. Hope you all wake up to six inches of the white stuff in the morning, but more realistically it's going to be Lynx Africa and a packet of After Eight mints as per usual. Anyway I raise my glass of mulled wine to one and all. Yo ho ho.


Location: Uxbridge
nsrobins
24 December 2014 22:27:48

Couldn't resist a quick look at the GFS 18Z


The GFSP continues to want to throw various shortwaves into the flow from Monday. The first fades away SSW but the next looks more robust on a SW trajectory. These little features can have a huge impact on the orientation and 'buoyancy' of the high and the conditions we experience here in the UK. Watch this closely . . .


Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
nsrobins
24 December 2014 22:30:44

And there we are:  at +180 on the GFSP we have -12 uppers approaching the E coast.


Happy Christmas


Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
JACKO4EVER
24 December 2014 22:38:09

Come'on, did we really think for a moment that a real easterly was in the making?
99 from 100 they always sink when shown on the models, even with cross model agreement. The background signals were no way strong enough this time IMO

Originally Posted by: White Meadows 


only an observation, but ever noticed weather moving in from the west is often adjusted slightly north with time, yet projected easterly outbreaks often sink nearer the time? Perhaps I could be wrong. 


Anyway Happy Christmas all,


keep on postin!


jacko

Polar Low
24 December 2014 22:51:57

I can see your point Steve the finer detail nearthe time is of course another thing but small steps.


A merry and safe xmas to all two members and many thanks to Brian and to all mods who work so hard to make it all happen 


http://mp1.met.psu.edu/~fxg1/ECMWF_0z/hgtcomp.html


 


 



 


I did ..and still do.


Originally Posted by: Gusty 

festivalking
24 December 2014 22:52:29
Well when the cold block is in place it always seems incursions from the west always eventually get pushed further south and west than expected. That snow storm the channel islands hot in march 13 was progged for Devon and it got pushed further and further south missed us and buried jersey!
Dousland, Dartmoor 206 m/asl
Its only going to snow when Gibby says so.
Chiltern Blizzard
24 December 2014 22:52:34


And there we are:  at +180 on the GFSP we have -12 uppers approaching the E coast.


Happy Christmas


Originally Posted by: nsrobins 


 


and heavy 'battleground' snow across a wide area at +216!


Merry Christmas to all on TWO!


 


 


 


Rendlesham, Suffolk 20m asl
Polar Low
24 December 2014 23:01:48

Bizarre to say the least 528 from a straight westerly


http://www.meteociel.fr/modeles/gfse_cartes.php?&ech=222&mode=3&runpara=1


 



 


 


and heavy 'battleground' snow across a wide area at +216!


Merry Christmas to all on TWO!


 


 


 


Originally Posted by: Chiltern Blizzard 

Stormchaser
24 December 2014 23:13:17

#


Yes, a merrier 18z from GFSP as a shortwave forms to our east and runs west along the northern flank of the Med. low, helping to transfer the deeper cold further west while also acting to prop up the ridge further north.


So a good spot there Neil 


 


Shame ECM and it's ensembles also had too much energy going NE over the high, flatter than I expected to be honest. Still plenty of room for what could be truly massive adjustments by the evening of 26th based on on recent days.


 


I wonder if the weekend low will truly be sorted out until the very last moment, what with the poor data count in the region where the northern shortwave originates (which is not a festive thing - it's always the case up there).


 


Signing off for the eve with a massive Merry Christmas and a raise of glasses first to JMA's fine 12z effort and second to GEM's excellent variant on the theme. GFS and ECM can have the stockings full of coal 


If you have any problems or queries relating to TWO you can Email [email protected]

https://twitter.com/peacockreports 
2023's Homeland Extremes:
T-Max: 30.2°C 9th Sep (...!) | T-Min: -7.1°C 22nd & 23rd Jan | Wettest Day: 25.9mm 2nd Nov | Ice Days: 1 (2nd Dec -1.3°C in freezing fog)
Keep Calm and Forecast On
sizzle
24 December 2014 23:21:37

Arrr  nice one stormchaser, love you man great post, going down signing off  too, peace people, have a good one merry xmas,

White Meadows
24 December 2014 23:24:14
Remember there's always the Boxing Day 'models go on holiday' missing data myth to debate before this weekends pattern is clearer.
Think I'll duck out of that mosh-pit this year!

Merry Christmas to all on Two
Gavin P
24 December 2014 23:24:42

I'm still fairly happy with my forecast at this stage. Still looks like we have the risk of snow showers in the east Saturday into Sunday, then cold and frost up to New Year.


I think the GFS is trying to break down the high pressure too quickly on 18z and 12z runs and it'll be more robust, giving us a cold end of 2014/start to 2015.


With much of central Europe plunging into the freezer, dew points and surface temperature will be more important to keep an eye on next week than upper air temperatures... Similar to New Year 2008/2009 maybe.


Whether this could turn into a proper cold/snowy spell, as the JMA and GEM hint, remains to be seen, but I wouldn't I certainly wouldn't rule it out...


Rural West Northants 120m asl
Short, medium and long range weather forecast videos @ https://www.youtube.com/user/GavsWeatherVids
Polar Low
24 December 2014 23:28:05

Some starting to like the general idea Gav


http://www.meteociel.fr/modeles/gefs_cartes.php?code=12&ech=192&mode=0&carte=1


 


vin P;654864]


I'm still fairly happy with my forecast at this stage. Still looks like we have the risk of snow showers in the east Saturday into Sunday, then cold and frost up to New Year.


I think the GFS is trying to break down the high pressure too quickly on 18z and 12z runs and it'll be more robust, giving us a cold end of 2014/start to 2015.


Whether this could turn into a proper cold/snowy spell, as the JMA and GEM hint, remains to be seen, but I wouldn't I certainly wouldn't rule it out...


Zubzero
24 December 2014 23:31:01
Gooner
24 December 2014 23:43:12

http://www.wetterzentrale.de/pics/Rpgfs2131.gif


http://www.wetterzentrale.de/pics/Rpgfs2134.gif


http://www.wetterzentrale.de/pics/Rpgfs21317.gif


GFSP holds the block to this point well, with rain turning to snow as it hits the cold air


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Andy Woodcock
25 December 2014 00:34:21


The updated MetO +120 fax chart is interesting as the 528 dam line is as far south as Rome and Sardinia in Europe but well north of the Arctic Circle in Greenland, Indeed it's off the map!


Does that count as WAA in the Greenland area?


Crazy charts again and FI begins at +96 max.


Merry Christmas everyone.


Andy


Andy Woodcock
Penrith
Cumbria

Altitude 535 feet

"Why are the British so worried about climate change? Any change to their climate can only be an improvement" John Daley 2001
haghir22
25 December 2014 00:41:06
Hic
YNWA
Quantum
25 December 2014 01:03:41

Cold spell to last until at least new years eve, then the battle for middle earth begins.



2023/2024 Snow days (approx 850hpa temp):
29/11 (-6), 30/11 (-6), 02/12 (-5), 03/12 (-5), 04/12 (-3), 16/01 (-3), 18/01 (-8), 08/02 (-5)

Total: 8 days with snow/sleet falling.

2022/2023 Snow days (approx 850hpa temp):

18/12 (-1), 06/03 (-6), 08/03 (-8), 09/03 (-6), 10/03 (-8), 11/03 (-5), 14/03 (-6)

Total: 7 days with snow/sleet falling.

2021/2022 Snow days (approx 850hpa temp):

26/11 (-5), 27/11 (-7), 28/11 (-6), 02/12 (-6), 06/01 (-5), 07/01 (-6), 06/02 (-5), 19/02 (-5), 24/02 (-7), 30/03 (-7), 31/03 (-8), 01/04 (-8)
Total: 12 days with snow/sleet falling.
Arbroath 1320
25 December 2014 01:05:29



The updated MetO +120 fax chart is interesting as the 528 dam line is as far south as Rome and Sardinia in Europe but well north of the Arctic Circle in Greenland, Indeed it's off the map!


Does that count as WAA in the Greenland area?


Crazy charts again and FI begins at +96 max.


Merry Christmas everyone.


 Andy


 

Originally Posted by: Andy Woodcock 

Unfortunately the High over us is sinking at +120. Too much energy going North. Plenty of cold and snow for Italy and the Balkans though.


We need a big flip in the models over the next few days otherwise it's a few frosty days followed by Atlantic dominated weather - consistent with today's Meto extended forecast. 


Anyway, best wishes to all for the festive season!


GGTTH
Whether Idle
25 December 2014 05:56:48

Merry Christmas Model watchers!  My Festive early morning synopsis is set at at 120 hours:


The consensus is to quickly sink the high to the UK.  Then, subtle and key disagreements in the modelling either result in further sinking allowing the northern arm of the jet domination and back to flat default mode. (GFS, GEM). The GEFS are dominated by the flat zonal by about 4:1.


Or as with UKMO, GME, NAVGEM, Chinese and Brazilian  there is a holding pattern which allows some undercut.  NAVGEM brings in an easterly by day 7, Brazilian by day 6


It all appears VERY finely balanced and appears to hinge upon whether the orientation of the western corner of the high is just far north enough and orientated at just the right angle to allow an undercut, or NOT.


EDIT - ECM goes flatter so overall zonal return is much the favoured option by the big hitters BUT there is sufficient uncertainty at the initial (less than 120hrs) stages IMHO  to justify at least a further 12 hours of uncertainty regards whether an easterly can be salvaged.


Here's a few snapshots:


GEM:120


 



GFS:                                                                                        GFS P



 


and the other ones..


GME:



UKMO


Modele UKMO - Carte prévisions


NAVGEM:



CMA:



Anyone fancy a 156hr Brazilian?



 


 


 


Dover, 5m asl. Half a mile from the south coast.
kmoorman
25 December 2014 06:41:48
The longevity of the cold spell, that the GFS ensemble was showing a couple of days ago has all but disappeared today. Shame. But as shown above there's more to the models than GFS.

Merry Christmas to you all.

Kieron
Home: Durrington, Worthing, West Sussex. (16 ASL)
Work: Canary Wharf, London
Follow me on Twitter @kmoorman1968
GIBBY
25 December 2014 08:49:26

Happy Christmas to all on TWO. My Christmas morning report is here:-


http://www.norton-radstockweather.co.uk/Model-Analysis%282859336%29.htm


Martin G
Kilmersdon Radstock Bath Somerset



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