PHL Tuesday Forecast - Very hot midweek

Two main features on this morning’s weather map: a large high pressure system now south of us and a large-scale thunderstorm complex across NW PA. This high pressure system will move off the east coast by tomorrow and will set up as a “Bermuda high” pumping hot air into the Mid-Atlantic region for the next couple of days. Temperatures will soar well into the 90’s from DC to NYC tomorrow and Thursday, but then a cool front will slip through on Friday starting a downward trend in temperatures for the weekend. Meanwhile, the large-scale thunderstorm complex that is across NW PA this morning will track southeastward and should slowly weaken as the day progresses. Nonetheless, lots of high clouds will fill the sky from DC to Philly and scattered afternoon and early evening showers and thunderstorms cannot be ruled out; especially, to the west of DC and Philly. Once the cool front slips to our south early this weekend it will stall out and this should lead to some unsettled weather with showers and thunderstorms possible in the Mid-Atlantic both Saturday and Sunday. Today- lots of high clouds and warm with an afternoon shower or thunderstorm possible; especially, in the western suburbs, mid-to-upper 80’s (normal high is now 78 degrees)

Tonight- partly cloudy, warm, an isolated shower or thunderstorm, upper 60’s

Wed- mostly sunny, very hot and humid, mid-to-upper 90’s

Thurs- partly sunny, very hot and humid, chance for an afternoon or evening shower or thunderstorm, mid-to-upper 90’s

Fri- partly sunny, not quite as hot, chance for a shower or thunderstorm, upper 80’s

Sat- variable clouds, a few showers or thunderstorms possible, near 80

Sun- mostly cloudy, a few showers and thunderstorms possible, near 80