This is from Bobby Martrich, a met over at Lehigh Valley Weather Patrol on facebook, and he’s dead on as to why the snow is starting MUCH EARLIER than forecasted:
This should result in earlier changeovers down south as well especially when the storm really gets cranked and more cold air is drawn down from New England. Totals may go up for everyone, including I-95. I’ll be watching over the next few hours and will update as warranted. There are reports of roads becoming snow covered in parts of PA already so be careful out there.