Remove ads from site

Rob K
31 January 2018 16:13:04


Rob on the train so can't post charts - Friday night and the UK is over 530 dam , upper air not cold enough to support snow eithrr.


Front edges in and dewpoints and temps nudge up a little further - rain 


Originally Posted by: Shropshire 


I thought you were talking about next week. Of course it's too warm on a Friday/Saturday for most. 


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
sizzle
31 January 2018 16:14:56

https://www.gavsweathervids.com/ Big cold upgrade for next week?

Arcus
31 January 2018 16:15:30


 


I think its because its yesterdays video which would be based on yesterdays Model Output. It seems the bigger switch to colder conditions occurred overnight and also on this mornings charts.


Originally Posted by: snow_dann 


On the BBC lunchtime forecast where Friday into Saturday was discussed, they showed the prognosis of either cold with rain or depending upon timing and intensity of precipitation, cold with snow.


Ben,
Nr. Easingwold, North Yorkshire
30m asl
Russwirral
31 January 2018 16:18:35

All these complaints that its game over for the south coast... not when -10*C uppers are within the vicinity


 


Modele GFS - Carte prévisions  


 


Ok ok, so it just clips southern england.... but still - the point is there, this winter is far from over.  Infact I would say the current output is probably some of the wintriest ive seen since 2013.


Russwirral
31 January 2018 16:21:21

Also - expect some fun and games into FI if we are begging to get wafts from the cold beast over canada / Greenland


 


This chart is crazy cold


 


Netweather GFS Image


some faraway beach
31 January 2018 16:27:14


 


Further reply from Liam


The 06Z and 18Z runs of the GFS are never worth taking much notice of because they include fewer observations in the initialisation than the main 00Z and 12Z runs. As a result, the reliability of the output isn’t particularly good. And, it’s the GFS...


Originally Posted by: Gavin D 


One surprising thing I noticed from the data which Arcus posted over Christmas and the New Year was that it's the 18z and 00z which took by far the most observations into account - up to twice as many as the 06z and 12z.


If you're looking for a potentially flaky run, it would be the 12z, which is ironic, because it's probably the one to which most of us pay the most attention, frame by frame, as it rolls out.


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.
Retron
31 January 2018 16:30:34

A nice MetO output this evening - the warm sector at 144 has, I believe, -7C as its warmest temperature! That's a recipe for widespread snow as it moves eastwards across the UK.



Leysdown, north Kent
Rob K
31 January 2018 16:34:05


A nice MetO output this evening - the warm sector at 144 has, I believe, -7C as its warmest temperature! That's a recipe for widespread snow as it moves eastwards across the UK.



Originally Posted by: Retron 


 


The GFS at the same time has 850s quite a bit higher (they are positive for a time over the UK on this run) so still lots to be resolved.


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
Nordic Snowman
31 January 2018 16:36:41

With charts like this for Tuesday, I fail to see what all the excitement is about?


http://www.wetterzentrale.de/en/topkarten.php?map=1&model=gfs&var=2&time=135&run=12&lid=OP&h=0&mv=0&tr=3


I see frosty weather in the drier spells and after a close but not actual encounter with some E'ly air, it looks like Atlantic air from the W and NW will dominate next week.


Yes... the upper air is notably cold from this direction (relative to norm) but the air in front of the ppn band is not cold enough for widespread snow. Colder PM air follows before milder/wetter interludes follow and then a return to colder/showery PM air.


In essence, we have drier/colder and frosty, followed by some rain/showers with hill snow and at times, wet snow in parts of the N/higher ground, followed by blustery wintry showers.


A few tweaks are likely but all in all, it seems rather chilly with frost, wintry showers with variable temperatures. Not mild/zonal but certainly not a 'proper' big-freeze type of situation either.


For me personally, I'd prefer rain at 13c than at 5-6c!


Bjorli, Norway

Website 
Rob K
31 January 2018 16:38:49


With charts like this for Tuesday, I fail to see what all the excitement is about?


http://www.wetterzentrale.de/en/topkarten.php?map=1&model=gfs&var=2&time=135&run=12&lid=OP&h=0&mv=0&tr=3


I see frosty weather in the drier spells and after a close but not actual encounter with some E'ly air, it looks like Atlantic air from the W and NW will dominate next week.


Yes... the upper air is notably cold from this direction (relative to norm) but the air in front of the ppn band is not cold enough for widespread snow. Colder PM air follows before milder/wetter interludes follow and then a return to colder/showery PM air.


In essence, we have drier/colder and frosty, followed by some rain/showers with hill snow and at times, wet snow in parts of the N/higher ground, followed by blustery wintry showers.


A few tweaks are likely but all in all, it seems rather chilly with frost, wintry showers with variable temperatures. Not mild/zonal but certainly not a 'proper' big-freeze type of situation either.


For me personally, I'd prefer rain at 13c than at 5-6c!


Originally Posted by: Nordic Snowman 


You have picked the single mildest chart of the next 8 days there, to be fair!


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
Retron
31 January 2018 16:48:11


With charts like this for Tuesday, I fail to see what all the excitement is about?


Originally Posted by: Nordic Snowman 


Look at the precip type charts. I'll give you a head-start - here's the middle of the GFS mild sector (which is 8C warmer than the MetO at the same time, remember).



Snow on the leading edge and snow following behind. The next frame shows widespread snow as the warm sector is chased away.


And that's a mild run in comparison to MetO! (and GEM - ICON and ARPEGE don't quite go out far enough).


Leysdown, north Kent
Rob K
31 January 2018 16:50:50
A rather disappointing GFS run compared to the 6Z. Whether it's just a milder option from the ensemble or a mark of a flip back towards weaker blocking remains to be seen.
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
Maunder Minimum
31 January 2018 16:53:28

Best and coldest spell of the winter coming mid-month with the Strat warming and split vortex - showing up already in the GFS charts. Still FI for now - but watch events unfold from 12th Feb onwards.


New world order coming.
Rob K
31 January 2018 16:55:59


Best and coldest spell of the winter coming mid-month with the Strat warming and split vortex - showing up already in the GFS charts. Still FI for now - but watch events unfold from 12th Feb onwards.


Originally Posted by: Maunder Minimum 


So the soothsayers on NW say. But they seem to say that every few weeks in winter and it rarely comes to anything, so I will keep my rock salt dry for now.


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
Gooner
31 January 2018 16:56:58

A rather disappointing GFS run compared to the 6Z. Whether it's just a milder option from the ensemble or a mark of a flip back towards weaker blocking remains to be seen.

Originally Posted by: Rob K 


 


http://www.wetterzentrale.de/maps/GFSOPNH12_300_1.png


I'd say much encouragement with a chart like that, yes FI but look at the blocking


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Rob K
31 January 2018 16:58:27


 


 


http://www.wetterzentrale.de/maps/GFSOPNH12_300_1.png


I'd say much encouragement with a chart like that, yes FI but look at the blocking


Originally Posted by: Gooner 



I hadn't seen the latter stages - I was looking on Meteociel and it ground to a halt at 240hrs.


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
tallyho_83
31 January 2018 16:59:24

In FI the 12z Op run shows signs the N. Atlantic is quietening down for once: This could flip back! But this looks like the start of a very Arctic Northern blocked set up esp over Greenland if we were to fun on a few more days.



Home Location - Kellands Lane, Okehampton, Devon (200m ASL)
---------------------------------------
Sean Moon
Magical Moon
www.magical-moon.com


Gooner
31 January 2018 17:03:25

http://modeles.meteociel.fr/modeles/gfs/runs/2018013112/gfsnh-0-288.png?12


 


Meteociel catching up


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Gooner
31 January 2018 17:05:00

I bloody wish


 


http://modeles.meteociel.fr/modeles/gfs/runs/2018013112/gfsnh-0-336.png?12


 


http://modeles.meteociel.fr/modeles/gfs/runs/2018013112/gfsnh-1-336.png?12


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


roger63
31 January 2018 17:06:44

A rather disappointing GFS run compared to the 6Z. Whether it's just a milder option from the ensemble or a mark of a flip back towards weaker blocking remains to be seen.

Originally Posted by: Rob K 


Agree.In the 06h GEFS ensembles the easterly  options were very much in the minority.Lets see how the 12h ENS go.

Nordic Snowman
31 January 2018 17:11:14


 


You have picked the single mildest chart of the next 8 days there, to be fair!


Originally Posted by: Rob K 


Not intentionally Rob; Tuesday is the day in question regarding the PPN. I have since seen Darren's METO chart but when we are talking the W, rain is the most likely for lowland areas.


Bjorli, Norway

Website 
Rob K
31 January 2018 17:13:40


Yes, often the way that when GFS whips away some of the near-term excitement it offers up dreamland at T+infinity just to keep people hanging... 


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
Sasa
  • Sasa
  • Advanced Member
31 January 2018 17:23:53
That little low which was showing up as running up the channel on Sunday has moved further south into France. In any case it takes a miracle to get snow to my neck of the woods but the islands would do well.

Kingston Upon Thames
Retron
31 January 2018 17:30:50


 


Not intentionally Rob; Tuesday is the day in question regarding the PPN. I have since seen Darren's METO chart but when we are talking the W, rain is the most likely for lowland areas.


Originally Posted by: Nordic Snowman 


Did you do as I suggested and run the preceip type charts for the GFS? Remember, this is with a much stronger mild sector than GEM and MetO, the only other runs which go out so far (which are any cop!)


Here, this is Tuesday evening as the warm sector slides away eastwards...



EDIT: And the GEFS show the mean values for the warm sector on Tuesday are now -5C or -6C, compared with -7C from the 6z run. Much colder than the op, in other words...


Leysdown, north Kent
JACKO4EVER
31 January 2018 17:38:50


Best and coldest spell of the winter coming mid-month with the Strat warming and split vortex - showing up already in the GFS charts. Still FI for now - but watch events unfold from 12th Feb onwards.


Originally Posted by: Maunder Minimum 


if I had a pound for every FI potential winter outbreak I would be a rich man. I see nothing to get any excitement about, all pretty bog standard by the looks of things- always remember the rule of thumb, if it can go wrong it will and stellar charts always downgrade come the day. 

Remove ads from site

Ads