Once the cokd is in at ground level it only takes small tweeks here an there for snow to turn up. An under cut could hit the cold air plus drag in colder uppers, or a low could come down the north sea an do similar. The winter I keep hearing people talk about, 62/63 was a high pressure over the UK dominated type winter. Let's just see what transpires in the long run.
ps, I don't mean this winter will be anything like 62/63. That should go without saying, however I know some might read it that way.