Sun 8 AM : The short range high resolution models have the clouds coming in somewhat earlier than the FV3-GFS and GFS. About 2-3 PM. The FV3-GFS still about 7 PM. It will become quite windy today. Areas to the north of Philadelphia will be sunny most of the day.
Tonight’s NAM keeps the main cloud deck just to our south for much of Sunday. High clouds at times, but lower clouds aren’t forecast to move in until 4-7 PM. High 76-78
The WRF model, just available, has the clouds moving in about 1-3 pm, earlier just south of the city.