That is an image from Member 41 of the 12z Euro ensemble at HR 96, 12z Sunday. It is showing everyone north of US 50 below freezing at the surface. It's a great image, but just one out of 51 members.
Not sure if already mentioned, and yes it's the NAM so take it for what it's worth, but the 12z run appears to be a bit weaker and further south with the weekend event. It also seems like it wants to give a solid front end thump north of I-66.
Would be nice to get a consolation 1" - 3" on the backside with the deep freeze. Cold and dry is meaningless unless there's at least a few inches of snow on the ground.