This remains a difficult call from the standpoint of which models have the right idea on what is going to happen Sunday night and Monday. The worst case scenario is a weak flat low that runs into the Ohio Valley and redevelops along the coast. The Canadian and European weather models depict this idea and are the most bullish for snow. This would keep cold air trapped longer even along coastal areas from New York City north and east.
The European weather model and the Canadian are almost the same. The GFS weather model which was on the same page as the others has gone a different route today as it intensifies the primary low and takes it well to the west. This was much like the European run yesterday until that model flipped last night and matched the GFS!!!...READ MORE AT http://www.meteorologistjoecioffi.com/index.php/2016/12/08/weather-models-snow-early-next-week/