Taking the time to look at the forecasting models tonight, it seems that the GFS is out on its own regarding positioning for the high over the weekend. Seems just a little too far south to me; metoffice and ECM have a slightly stronger easterly flow. I fully expect the GFS to backtrack on this one. Also, don't be fooled by the slightly higher uppers that push in behind the initial easterly blast- make no mistake about it, the surface temperature will be bitter and the wind chill will only add to that. Finally, after the weekend and early next week I think it is currently around 60/40 in favour of prolonged cold. As Koldweather says, the GFS comes close to breaking down the highs defences, only to keep it strong in the long run. There is a danger that the block either sinks on its eastern flank or gets pushed away to the east, thus allowing an Atlantic influence to take over. One to monitor but as long as the UKMO and ECM say yes to prolonging the cold, i'm happy. Aaron