I'll back BT up here, I remember many fronts that have fell as snow here over just the last 3 years, for example:
23rd Dec 2009, warm front from the southwest, fell as snow very heavy, 10 CM here.
13 Jan 2010, warm front from southwest, fell as snow lasted all day, 5 CM.
18 Feb 2010, warm front, snowed all morning, 3 CM.
21 Feb 2010, warm front, 5 CM snow, melted in afternoon.
March 2010, several snow to rain fronts.
Second friday in Dec 2010, warm front, fell as snow here though not forecast.
This list doesn't include the many snow fronts of winter 2005-6 as well as countless others in the passed, and remember, I live on the coast!
There is a theme of expect the unforecast with this sort of sett up.
It's not over yet!