A Miller B type system will move into WNC late tonight where a cold wedge will have entrenched itself over WNC. This shallow layer of cold air that is funneled in by a strong high to our NW will create a difficult forecast for the area. Locations along The Blue Ridge Escarpment will have the highest chance to see accumulating ice, but the chance will be possible for slight ice accumulation even into the Asheville area. Below you can see a map produced by the National Weather Service regarding projected ice totals.
Model Details
Models continue to show light freezing rain moving into WNC very late tonight or early tomorrow morning. Though light, this could cause some slight problems on roadways in counties that border the NC/SC line. Below you can see the most recent NAM 3km precipitation depiction.
Now you can compare that with the GFS model that also shows the light icing. Once again, I think that this will be a light event, but even light icing can cause isolated problems for some. Initially a few sleet pellets or even snowflakes could mix in as precipitation begins, but this will quickly switch to rain or freezing rain for most all. As you progress towards the Piedmont the chance for more significant icing will come into play. Locations like Hickory and Greensboro have a much better chance to see Ice accretion compared to Asheville.
Northwest Flow Snow Possible On Backside
Several details still need to be resolved, but there is a chance on the backside of this storm that we see some snowflakes flying around the Asheville area. This would be Thursday morning if it were to occur. I expect locations above 3000’ along the NC/TN border to certainly see snowfall on this backside with at least a light accumulation. Above 4500’ 1”-2” will be possible and 3”+ will be likely in those highest elevations above 5000’. Below you can see the most recent projected snowfall map from the NAM 3km.
Extended Forecast
A cold front will dominate the area through the end of the week, and then Saturday appears to be the choice day of the weekend! Following Saturday, rainfall could move in late on Sunday bringing around a half inch of rain or so to the area. Check out the most recent European model 10 Day projection below.