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Rob K
16 January 2015 16:43:00


 


Looks around 520dam 500-1000hPa thickness here with the chance of frontal precipitation. 


The 12z output continues the chilly theme for the coming week or so. Details still seem hard to come by (as expected I suppose).


Originally Posted by: doctormog 


Yes, in terms of 850s that chart is actually colder than yesterday's even down here. ~526dam TT for London.


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
moomin75
16 January 2015 16:43:24


 


 


Which day is that? Day 8? We can't get consistency at 48 hours... Sigh.


 


Are you bad at Christmas if you don't get the toy you want?


Originally Posted by: Liquidic3 

I hate Christmas with a passion so don't get anything. Christmas and new year are just normal days. Bah humbug.


Witney, Oxfordshire
100m ASL
doctormog
16 January 2015 16:43:54

Pretty awful 12zs it has to be said.
GFS delays the inevitable for a day or so but then returns to full on zonal. UKMO us putting us out of our misery sooner. If it's going to break before really getting going I'd prefer it to be quick.

Originally Posted by: moomin75 


They are not "awful" and confirm the cold to very cold (in places) outlook highlighted by today's Met Office outlook.


Yes there are signs of it turning less cold in a week or so but that is by no means certain and certainly not shown with any consistency in the models. It may look a little less prolonged than a day or two ago but I have not seen the ensemble data yet (as they are not out).


Ally Pally Snowman
16 January 2015 17:05:42


 


Yes, in terms of 850s that chart is actually colder than yesterday's even down here. ~526dam TT for London.


Originally Posted by: Rob K 


 


Yes indeed a snow fest of a 5 day chart for the eastern side of UK. day 6 looks to be setting up an easterly as well


http://www.wetterzentrale.de/pics/Rukm1201.html


http://www.wetterzentrale.de/pics/Rukm1441.html


Bishop's Stortford 85m ASL.
Maunder Minimum
16 January 2015 17:07:56
GFS 12z is actually an upgrade for snow potential middle of next week and I assume that is what most of us want. Model inconsistency run to run is concerning however.
New world order coming.
Brian Gaze
16 January 2015 17:08:15


 


They are not "awful" and confirm the cold to very cold (in places) outlook highlighted by today's Met Office outlook.


Yes there are signs of it turning less cold in a week or so but that is by no means certain and certainly not shown with any consistency in the models. It may look a little less prolonged than a day or two ago but I have not seen the ensemble data yet (as they are not out).


Originally Posted by: doctormog 


 The only thing the word 'awful' should be applied to is some of the commentary in this thread. For days parameters have been marginal with a better chance of sleet or snow farther north (I live in the south in case anyone wasn't sure). This remains the case and the GFS and UKM are op runs are only offering variations which have been shown by the ENS in the last few days. Some people do need to chill out or perhaps try and find something to interest them other than just the prospect of a few cms of snow. 


Brian Gaze
Berkhamsted
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David M Porter
16 January 2015 17:12:35

There's far too much inconsistency within the model output at the moment. The UKMO normally a model to be relied upon within the +144 range has come up with a whole host of different solutions for the first slider next week. I dont think this will be resolved until Sunday at the earliest so all the toy throwing is pretty pointless until then.

Originally Posted by: Solar Cycles 


I agree completely SC. The exact track that the first "slider" low takes next week will IMHO be fundamental in determining what transpires after that. Until that is properly resolved, there is little point in putting a lot of faith in charts shown for beyond next week as far as I'm concerned.


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
Medlock Vale Weather
16 January 2015 17:19:23

Close to a foot for the spine of the country 


http://www1.wetter3.de/Animation_12_UTC/126_35.gif


 


Alan in Medlock Valley - Oldham's frost hollow. 103 metres above sea level.
What is a frost hollow? http://www.weatheronline.co.uk/reports/wxfacts/Frost-hollow.htm 
roger63
16 January 2015 17:24:51


http://modeles.meteociel.fr/modeles/gfs/runs/2015011612/gfs-1-180.png?12


Cold air still hangs on.


UKMO would probably be better longer term as the jet still undercuts the block, but too far north for us


GFS solution would take a long time to return to cold


Originally Posted by: The Beast from the East 


http://www.meteociel.fr/modeles/geme_cartes.php?&ech=144&mode=0&carte=0


GEM output at 144h has Scandi HP furrher west and holds on  a bit longer>matches METO medium term forecast reasonably well.

Solar Cycles
16 January 2015 17:29:49


Close to a foot for the spine of the country 


http://www1.wetter3.de/Animation_12_UTC/126_35.gif


 


Originally Posted by: Medlock Vale Weather 

Lol, over 20cm for me.😊

JoeShmoe99
16 January 2015 17:30:39


 


Looks around 520dam 500-1000hPa thickness here with the chance of frontal precipitation. 


The 12z output continues the chilly theme for the coming week or so. Details still seem hard to come by (as expected I suppose).


Originally Posted by: doctormog 


 


Im looking at that T+120 ukmo chart thinking it looks pretty good for here providing no warm air gets mixed in


 


As usual to much north, south bias

Stormchaser
16 January 2015 17:36:01

I have officially given up on analysing anything beyond about 48 hours for the time being; the variability for next week is just insane - the disintegration of the low to our NW days 3-4 is seemingly beyond reliable modelling even at such short range.


 


As for within 48 hours, GFS remains totally uninspiring here, and brings only a dusting of snow for most of those places that do have the favourable parameters for snow. A few notable exceptions though - most notably across the far NW of England where heavy snow showers appear probable away from the coasts themselves, thanks to convection over the Irish Sea driven by the strong drop in temperature with altitude.


Early hours of Sunday, some kind of convergence line may also give NE Scotland a fair bit more snow on top of what's already there.


 


Euro4's 06z run showed a bit more promise further south later tonight, with an area of precipitation across the SW being shown as a rain/snow mix. Perhaps a bit of falling snow to wake up to for those who get lucky - right on the edge between rain and snow so no guarantees. It appears dependent on heavy bursts of precipitation, similar to early Wednesday but with the parameters just a little more favourable.


Meanwhile the snow showers for the NW of England are shown to make further progress inland than GFS has gone for, the extent across Northern England largely controlled by high terrain it seems:


Rain/Snowfall EURO4 Sa 17.01.2015 00 GMT 


Looking 24 hours further ahead, the potential precipitation for the south does turn up, but is only shown to be rain out to 6am despite the air being subzero very close to the ground (950hPa temps -1 to -2*C), dew points close to zero, 2m temps of 1*C away from the coasts and a low level flow from the colder north (albeit weak). Seems harsh to call it rain from those parameters.


 


The 12z run is awaited with a bit of interest.


 


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Keep Calm and Forecast On
nsrobins
16 January 2015 17:42:14


 


 


Im looking at that T+120 ukmo chart thinking it looks pretty good for here providing no warm air gets mixed in


 


As usual to much north, south bias


Originally Posted by: JoeShmoe99 


Actually N England may do very well on Sunday themselves with a little feature dropping South.

A bias north for me, but maybe not biased enough for you perhaps.


Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
soperman
16 January 2015 17:42:46

I too like the UKMO evolution and it does seem that Tuesday/Wednesday's snow has been upgraded with a deeper low sliding South.


Sliding lows can bring a great deal of snow for many parts of the UK as we experienced 3 or 4 years ago and I am sure the Northern contingent are especially happy with the output so far.


The return of less cold zonality as shown by the GFS may be a little premature.


All eyes now on the ECM and plenty of model watching over the weekend.


The next 5/6 days


Everywhere should feel


Most places will get some   and some


Fewer places including the Southernmost counties - including Portsmouth!!!

Whether Idle
16 January 2015 17:51:17


I have officially given up on analysing anything beyond about 48 hours for the time being; the variability for next week is just insane - the disintegration of the low to our NW days 3-4 is seemingly beyond reliable modelling even at such short range.


 


The 12z run is awaited with a bit of interest.


 


Originally Posted by: Stormchaser 


Agreed A look through through the GEFS at 144 hours the range of solutions is probably the maximum I've ever known.


It is simply to early to call the end before the beginning and too early to give much detail before 48 hours


Dover, 5m asl. Half a mile from the south coast.
sriram
16 January 2015 17:57:16
If only we can get a jan 1982 repeat

If only ...................
Sriram
Sedgley, West Midlands ( just south of Wolverhampton )
162m ASL
Rob K
16 January 2015 18:05:32


 


The 12z run is awaited with a bit of interest.


 


Originally Posted by: Stormchaser 


The 12Z  Euro4 has the rain band on Sunday further south, so it misses the UK almost entirely. 



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
sandman
16 January 2015 18:11:54
I rarely comment here but have been a member for years. Some of the knee-jerk comments over the last few days are extremely tiresome. Matty H, where are you? I'll be taking a break from the forum for a few days.
Sandy
Newark Notts
Gooner
16 January 2015 18:20:44

GFS 12z is actually an upgrade for snow potential middle of next week and I assume that is what most of us want. Model inconsistency run to run is concerning however.

Originally Posted by: Maunder Minimum 


http://expert-images.weatheronline.co.uk/daten/proficharts/en/2015/01/16/basis12/ukuk/rart/15012106_2_1612.gif 


http://expert-images.weatheronline.co.uk/daten/proficharts/en/2015/01/16/basis12/ukuk/rart/15012112_2_1612.gif 


http://expert-images.weatheronline.co.uk/daten/proficharts/en/2015/01/16/basis12/ukuk/rart/15012118_2_1612.gif 


Indeed it is for those North of the M4


JFF of course


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Matty H
16 January 2015 18:22:24

I'm watching. 


To be fair I think most of the knee-jerk comments have come from Beast, and most people have rightly ignored it. 


Saint and one or two others make extremely valid and accurate points about what current Synoptics are compared with a few days ago, yet get shot down. The "let's wait and see what happens" view is fine, but this is the model output discussion.


There have been several off topic or plain stupid posts over the last few days. We are keeping an eye on things. 


Frostbite80
16 January 2015 18:22:27
ECM following ukmo by the looks of it!
nsrobins
16 January 2015 18:25:15
ECM looks like sliding too Far East on this run.
Tues will not be set for a few runs yet.
Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
Gooner
16 January 2015 18:26:24

http://expert-images.weatheronline.co.uk/daten/proficharts/en/euro4/2015/01/16/basis12/ukuk/prty/15011706_1612.gif


E4 shows a wintry band moving SE in the early hours


http://expert-images.weatheronline.co.uk/daten/proficharts/en/euro4/2015/01/16/basis12/ukuk/prty/15011712_1612.gif


Moving away later


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Frostbite80
16 January 2015 18:34:52

Would be nice to see a second slider on ECM but I think the Azores high is going to get in the way.......again!


edit- I was wrong there she goes...........however the uppers are very borderline so many would see rain but time for change

The Beast from the East
16 January 2015 18:39:35


 


To be fair I think most of the knee-jerk comments have come from Beast, and most people have rightly ignored it. 


 


Originally Posted by: Matty H 


Didnt you say a while back that you only bothered to read the posts of a select few of your favourite people.


Anyway,  at least ECM keeps it cold zonal. Fine for the north. Too warm down here


 


"We have some alternative facts for you"
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