Tomorrow and Friday will be the worst days of heat and humidity. Highs will reach the lower 90s, combine that with the humidity, and feels like temperatures will be in the mid to upper 90s. Air quality will be an issue with lots of haze in the air.
The next concern will be several rounds of strong and heavy thunderstorms that develop Friday afternoon and evening. Some of these storms will grow to be severe with damaging winds, hail, intense lightning, and waves of torrential downpours. The storms won't be slow-moving, but any area that receives multiple storms could see some localized flooding.
Our weekend forecast isn't looking as optimistic as earlier in the week. Showers will make a quick move at us on Saturday as a system approaches. It will be slow to depart the coast, so showers may cling to the shore into Sunday. Much cooler weather by Sunday with an east wind. Highs might not get out of the 70s.
THU: Mostly sunny, hot and humid. High: 93
FRI: Partly, sunny, hot and humid. Afternoon and evening strong to severe storms likely. Some areas of localized flooding possible. High: 92
SAT: Mostly cloudy with the chance of showers across the entire area. High: 85
SUN: Showers cling to the coast. Mainly cloudy and cool. Some pockets of sun distant NW suburbs and Lehigh Valley. High: 79
MON: Partly sunny. High: 79