The GFS, FV3-GFS, NBM and NAM models have all come to a consensus that this will be a rainy weekend in Philadelphia.
All models have rain for both Saturday and Sunday! (Sunday afternoon is expected to have the least amount of rain. ) The GFS from earlier this week seems to have had the best continuity with the forecast and seems to have been more accurate than the new, still unofficial, FV3-GFS.
Saturday: Cloudy with rain. High 50-55
Sunday: Cloudy with rain in the morning, intermittent showers in the afternoon. Breezy. High near 50.