Seeing as you lot are obsessed with snow (aren't we all) I found this.
This chart is the closest I have for now. (reports of snow across northern Scotland tonight) This is the midnight forecast for Tues/Wed 17th Jan.
See the blue dotted line across the northern edge of Scotland. This is the 528
DAM line (its a thickness of air measurement) but as I mentioned earlier, its what is associated with snow. Basically, if you have that and you have rain, 9 times out of 10 it will fall as snow or a wintry shower.