CTP is starting to mention the Monday winter weather chance.
As the cold air begins to recede early next week, we could see
some precipitation return to the area. There are timing
differences in the medium-range models, with the 10/12z GFS
bringing light precip into central PA Sun night/early Monday
while the 10/00z ECMWF holds the precip off until Monday
night/early Tues. Regardless of exact timing, it could be cold
enough, initially, for a bit of wintry precip early next week.