Our extended second heatwave of the year will come to a climax on Saturday with high topping the century mark. Our record high for Saturday is 103-degrees, set in 2010. The 90-degree has been attributed to at least one death in Philadelphia and several people across the Delaware Valley were medically treated on Independence Day during various festivities. We'll bust the heat this week as a cold front drops from the north, but we will see some thunderstorm activity associated with it.
Tonight we'll see mostly clear skies with warm and humid temperatures. Lows around the city in the mid-70's but there could be a few places to the south who don't get out of the 80's overnight. Not a lot of cooling off as the humidity sticks around, and a southwest wind keeps the heat pump primed. Temperatures start to rebound quickly tomorrow as we suffer what could be the hottest day of the summer. Temperatures in the lower 100's tomorrow in the city, closer to 104-degrees towards the south and east. There will be some relief at the shore with temperatures in the mid-90's and a water temperature around 75-degrees. The cold front starts to push in Saturday evening and night, giving us a chance of showers or thunderstorms. The SPC has put the entire region under a slight risk for severe thunderstorms, with the biggest threat being high winds and large hail.
Sunday looks to be the last day of our heatwave, with temperatures topping out in the lower 90's with scattered showers or a thunder crack or two around. Nothing as severe as what could be seen Saturday. Monday, we break the heat. High temperatures drop down to the mid-80's with partly sunny skies. Monday is a great day to open the windows and let some fresh air in. Weather stays pretty much the same for Tuesday and Wednesday. Wednesday night into Thursday, another chance of showers and thunderstorms, otherwise, partly cloudy skies for Thursday. The chance of precipitation sticks around for Friday, with temperatures slowly creeping back up to near 90-degrees.