Well written snippet from the Mt Holly AFD describing the key features that models likely have not resolved yet-
A much colder air mass is forecast to be in place early next week as arctic high pressure from Canada builds nearby. There will be one or more ripples of energy in the northern stream that will initiate some precipitation. The timing and strength of these features within a trough aloft will determine the details. Some guidance is weaker with the trough and associated energy and therefore less precipitation, while focusing on a secondary short wave that delivers more of the precipitation on Tuesday compared to Monday. There still remains the potential for a period of wintry precipitation Monday and/or Tuesday, however uncertainty remains as the model guidance continues to differ on the handling of the upper- level features. The pattern does look conducive though for an overrunning snow or wintry mix setup with arctic high pressure to the north and energy arriving from the west. It is a matter of how much the moisture attacks the cold air across our region, with also how far south the arctic high pushes.