Tomorrow could be interesting with some strong showers/storms moving through in the afternoon. A very low freezing level of 850mb, steep low-level lapse rates, some SBCAPE, and a deep mixed-layer will give a shot for some thunder, small hail, and gusty winds.
Then we turn to Thursday where there will be a very legit shot for 70s across SE PA. The NAM, which is usually biased cold, even has it. Wherever the boundary sets up though will be the difference between mid-40s to the north and low-70s to the south