According to the latest forecast models very cold air from the North East will certainly establish itself across northern Europe. This kind of pattern with high pressure to the east of Scandinavia is the classical severe winter weather scenario seen before in 1963 and the famous 1947 winter! How long the high pressure stays there is the key to the severity of a UK winter. So there is very good reason at this moment in time to give odds on 2-1 that Christmas 2009 will be a snowy one!