I was just about to post that I was happy, in the MR, to see the CMC get the front hung up near us this weekend and offer the hope of some rain. Bad that its on the weekend of course. GFS was still very dry for parts of PA but moved the focus of it north over the N Central part of the state. Previously mentioned front gives Southern PA rain early next week.
That GFS period of heat you mentioned would definitely be a triple digit watch for MDT area.
Edit-Euro hangs up the weekend front along S Pa as well so game on for beneficial rains this weekend...until 12Z at least.