Can't see it from the Charts page - maybe Brian can shed some light on whether it's currently available?

In January 2015 the previous parallel became the new op. You could access that iteration of the parallel on TWO from Oct 2014 to January 2015.

The new version of the GFS is actually 'pre parallel' at the moment and no date for pushing it into full evaluation has been set. Once a date has been set it will then run for several months officially as the parallel run before being transitioned into production.

In the next few weeks I will if I get time add in the current 'pre parallel' run to TWO.

Oh- don't do it just for one poster Brian.

Sorry for going off topic but what parameter did you use to produce that?

There is a snowfall and precip parameter but they are cumulative over an entire maturity group. I've looked in SP1 and SP2 and cannot find anything that can be used to do this.

ECM looking pretty good, UKMO looks superb at T+144 .

GFS I think is being overly progressive and I think the high pressure will stick around us for longer with the potential for some ridging over Scandi (although that is still to far away at the moment).

The UKMO could well keep the northerly theme going beyond the weekend.

One thing notable about the upcoming colder weather is how cold Scandi is over the next week, which could make an Atlantic breakthrough more difficult.

http://wxmaps.org/pix/temp4.png

Some pretty cold temps forecast here later on in the week, even with what may be an overly progressive GFS.

So yes at this point anything may be borderline where I am (Southampton) but I am pretty happy with how things look.

The prospect of warm air flooding over the UK and a strong Euro high have gone and its looking pretty cold and dry. Its good to see a dry outlook, I was handcycling through the New Forest today and it was very boggy with some minor flooding in areas. So a drier spell is very welcome.

Even if the cold doesn't turn out to be as strong down south who knows, perhaps something better for us may come along later? 

We started off with a GH only to be dumped , wrist slashing , WIO posts etc and it seems to have turned around in the last 36 hours or so with UKMO 144 looking great , obviously it has to verify but one thing is it will be a cold week, some harsh frosts in places even Snow around.

ECM looks cold under the HP at the end with the possibility of linking to another HP to the NE, of course it could spin around again this evening , after the woeful December we have had the lower temps will be very welcome.

Someone mentioned earlier about the accuracy of the 144hr charts on the UKMO runs being somewhat questionable. Is there any evidence out there that indicates whether or not the UKMO 144hr charts are less reliable than the corresponding charts on ECM and GFS runs?

That has been said so many times on here , why should it be so poor 6 days out ??

UK above at 96

GFS below at 96

PPN at 126

UKMO still looks good at 120

Another good 144 from UKMO

GFS 12z is a nightmare for cold fans after t+144

Compared to the 0z the GFS12z seems to accelerate the end of the cold spell.

Or accelerate the start of the next one in FI? 

Thats a horrendous chart for winter fans - it's as if we have wound the clock back to Dec - hope it doesn't come off

CMC looks better for cold at 120.

GEM 120 similar to UKMO:

UKMO, different to GFS

These charts say to me: Cold, snow on hills especially in the N. 

Fixed your post to make it more reflective of recent performance.....

http://www.bbc.co.uk/weather/features/35276469

Chris Fawkes and the latest Beeb 'Weather for the week ahead'. In recent times this has taken a tentative look out to 7 days but it's a reflection of the model uncertainty that Chris stops on Friday.

Notice how much further south GFS has the HP to our west at 144hrs than UKMO has it.

Only a gut feeling, but I sense that GFS may be falling into the same trap it has fallen into so often in the past of being too progressive. UKMO may be wrong with it's evolution, but in my experience it doesn't often lead us up the garden path, if at all.

GEM 12z looks like building a Scandi High at t180:

http://www.meteociel.fr/modeles/geme_cartes.php?ech=180&code=0&carte=0&mode=0&archive=0

If the GFS has this one right with regard to the weather on Friday - Sunday of next week then it will be an extraordinary performance, as it will have "faced off" UKMO, GEM  and to some extent ECM, amongst others.

If, however, it gets the weather wrong for next weekend, we can draw a different conclusion.

An adjustment 300 miles north of this GEM chart would be fun for many (way into FI, I accept)...