Before showers and severe thunderstorms by the evening commute we reached a high of 96 at Philly International Airport, but it felt well over 100 thanks to the heat index! The dew point all day was in the lower 70s and it felt pretty nasty outside! Although the high of 96 was the hottest day we've seen so far this year the record high for today was 103 set back in 1901! How about that!
Overnight there will be scattered showers and thunderstorms(below severe criteria as the best dynamics are pushing offshore) with lows in the middle to upper 70s; as this front stalls on top of the region on Thursday there will also be a short wave that will help enhance some dynamics aloft; it will remain humid with highs in the middle 80s and there will be heavy rains as well thanks to enhancement from Arthur to the south. Before you ask how that is possible, we meteorologists call it a "Predcessor Rain event whereas a stalled front nearby a tropical system that just pools its moisture together and creates heavy rainfall; I would not be shocked to see an additional 1-2" of rain to fall on top of what fell on Wednesday(leading to more flash flooding possible).
Fourth of July itself will start off wet as the front pushes eastward, but then we got some clearing in the afternoon as highs reach the middle 80s with lower humidity. Also this will ensure that Arthur steers clear of the region as it stays to the east of the Jersey Shore as well. Saturday and Sunday will be dry and seasonable with highs ranging from the lower to middle 80s and plenty of sunshine.
Remember that you can check out the rest of the 7-day forecast(any time) at www.scottderekwx.com/forecast.html.