From the National Weather Service:
Thursday afternoon and night - Rain develops thu afternoon/early eve. Rain will likely change to a brief period of snow before ending across the interior high terrain. Mainly just a coating of snow possible, but may see an inch in the Berks/highest terrain of northern Worcester Hills.
Rain Thursday afternoon and night probably ends as a brief period of snow across the interior high terrain. Main story though will be unseasonably cold and windy weather that follows Fri and Friday night. The wind diminishes Sat, but temps will remain well below normal.
Brief return to seasonable temperatures occurs Sun, but well below normal temperatures return by next Mon and Tue.