A persistent area of clouds plagued the Midstate from late morning until about mid-afternoon. Areas to our west saw enough sunshine during the day that thunderstorms developed over the higher terrain. The rest of this evening locally will feature passing clouds with user-friendly conditions. There is a slight chance for thunderstorm for locations west of the Susquehanna River, but again most of the activity is confined to the ridges of western PA. Temperatures will be in the middle to upper 70s through sunset.
By Monday afternoon you will notice a change in the humidity levels as dewpoints climb into the upper 60s to near 70F. Prepare for a pretty sticky day with temperatures reaching the middle to upper 80s. This pattern change to more humid conditions will also prompt thunderstorms to pop-up in the afternoon. Similar to Sunday western PA will be favored for thunderstorm activity, but a few can not be ruled out locally.
Tuesday and Wednesday bring more warmth and humidity with temperatures near the lower 90s in the afternoon. A cold front then arrives by Thursday bringing a better chance of widespread thunderstorms. Relatively cooler and less humid follows the front and by Friday, Independence Day, we expect a dry day where the warmth is more bearable.