I don't know but I would presume so it doesn't actually say. it seems to be about 3 or 4c too low for anywhere in London. strange

The difference between the 2 Op runs, particularly in term of surface temp is mental.   It does highlight that the GFS Op run is about as mild as you could possibly get within the combined ensembles.  

Well for one thing I doubt that the models allow for the heat island effect.  I may be wrong but that would be my guess as the most plausible reason.

It's only about 5.5C here at the moment, which isn't too far off.  GFS is showing a high of around 6.5C v ECM a shade under 5C.

I do know that the temperatures that you see on the BBC TV forecasts are city centre ones; indeed the forecasters often now put up a graphic for overnight minima 'in the countryside' because the city centre values are overstated.

OK thanks Heat island effect as Essan said as well, sounds the most plausible reason. That graph is a better guide to to temp in the countryside around London than London itself. 

I think if you're trying to provide information to the greatest number of people then 'urban heat island' values are probably what the majority experience.   If you were trying to be representative spatially then you'd do it differently. 

Whenever I see the BBC graphics in the current set-up I always assume 1-2 degrees lower by day and more at night.

This must be the area of snow the Met are keeping an eye on:

http://expert-images.weatheronline.co.uk/daten/proficharts/en/euro4/2016/01/13/basis06/ukuk/prty/16011506_1306.gif

Perhaps people have finally come to realise & accept that this coming cold (ish) spell will be a largely uneventful one, but with plenty of dry usable sunny weather around. Maybe they are just having a little chill out from obsessive model watching 😄

They're all outside making snow-persons and tobogganing 

This highlights the snow possibility for the E and Northern Home counties tomorrow morning, also the heavy snow possible for S Scotland and NE England.

http://www.theweatheroutlook.com/charts/gfs/12_18_preciptype.png?cb=93

.....and the Thu pm snow for C and S areas:

http://www.theweatheroutlook.com/charts/gfs/12_27_preciptype.png?cb=271

....finally the SW snow that Ian has alluded to:

http://www.theweatheroutlook.com/charts/gfs/12_39_preciptype.png?cb=179

And a big heavy blob of rain over the channel islands... pahh!! 

Looks to be an improvement on 06z:

http://modeles.meteociel.fr/modeles/gfs/runs/2016011312/gfs-0-84.png?12

Much better:

http://modeles.meteociel.fr/modeles/gfs/runs/2016011312/gfs-0-114.png?12

-8C well into the UK on that one!

UKMO currently holding firm:

http://www.meteociel.fr/ukmo/runs/2016011312/UW96-21.GIF?13-17

And if you put all those charts together, the total expected snowfall for the Vale of Evesham is almost as much as we had in July last year .... 

The precip feature running southwards on Sunday on the GFS 6z has disappeared so I'm back to my clear and frosty day but just the chance that it could be a snow covered walk in the Chilts. 

Looks like we have a good upgrade for both snow and the longevity - if that's the case I will bin all future 6z forever!! 

Not much of an easterly... pretty well a cold high sat right over us but I will take that!

UKMO looking chilly at 120

Around 526 dam for London so not super cold but wouldn't turn that chart down!

And UKMO 144 looks like maybe setting up some snow?

How can it be so different from the GFS at only t+96?