Here is Robert's (WxSouth) latest thinking:
Final Snow Call Map (Tuesday January 16, 2018)
by wxsouth • January 16, 2018
It looks like I’m going to have to adjust down in most areas. As the RGEM, GGEM and ICON I fell for were (or going to be) simply too sharp too far west I think. At this point they looked overdone and now viewing all guidance, the European looks about right overall. Tonight as the upper wave scoops more moisture quickly through Georgia and just east of the mountains in NC and VA, there will be enhancement going on. Meaning better lift than what may occur just west of the southern Apps in western GA and central Alabama where lift sort of falls in a lull. One spot that may be surprised is middle GA or even Atanta area, maybe attaching more up 85 and across 26 northwest of Columbia since the UVVs are going to be increasing rapidly around midnight and after, so the snow map is hard to draw in every region, so I had to be broad. But the 1 to 2″ amounts may get pretty close to the area just mentioned but isn’t outlined. Surprises usually happen and the snow graphic will be right some areas, wrong some areas. By and large a weak system with minimal moisture, but the rates and duration will probably increase in central NC and central VA, possibly ending as snow to the coast. Also, rain may start the event along and near 85 from western SC Upstate to southern Piedmont NC tonight with lack of strong cold there early on.