Last night's thunderstorms were slow moving drenchers that dropped between a half inch and over two inches of rain throughout the northern and western burbs of Philadelphia. Some parts of Wayne, Valley Forge, and King of Prussia picked up the heaviest rainfalls per radar estimates (seen below), with localized flooding occurring last night through the areas. Additionally, the light show that accompanied the thunderstorms was pretty epic...and its sound show enough to keep people awake or wake the early sleepers up.
Those thunderstorms have nudged themselves slowly into New Jersey although as of 4:30 there's a cell in the lower parts of Bucks that's moving towards Jersey and should get there in a bit. In their wake, low clouds and fog are common through the region this morning and will linger through a chunk of the morning commute before the fog/low clouds break up.
Sunshine will take over from late morning on, with some passing pop up clouds in the sky as another frontal boundary approaches from the west. This second front will push the morass of humidity and rainfall out of the region tonight as it crosses the region. With the front comes the possibility of a thunderstorm late this afternoon. The best chance of that passing thunderstorm will be to our north but any thunderstorm looks to be scattered as the dynamics with this second front aren't quite as robust and some of the better instability was "used" in last night's thunderstorm activity. If a storm pops, the best chances time wise will be after 5 PM.
Highs this afternoon will range from the 70's at the Shore to the middle 80's across inland sections, with Philadelphia topping out around 84 degrees. Today will mark the high water mark for temperatures as we look to cool off a bit...and lower humidity levels a few notches...for the balance of the work week.