Having seen the weather at lunch time I think the meto are thinking that most places will see some leading edge snow as the front moves in, but in the south this will very quickly turn to rain. However, it may still cause a few problems before it turns to slush. With regard to the 6z this did indeed show the snow line further north than previous models, but as someone has already mentioned it is still further south than yesterdays 6z. Tens of miles are going to make all the difference in this situation and with 36 hours to go there is still time for the line to go further south or north. Just look at the event a couple of weeks ago when the snow suddenly switched direction hours before it arrived and Nick et al got a nice covering. Nothing is for certain until you see it happening through your window...