For the past few days the temperature has gotten gradually warmer despite being under the influence of high pressure; on Saturday we had a northwesterly wind with highs in the lower 80s while Sunday we had a more westerly wind with highs in the upper 80s and then Monday with a southwesterly wind we reached 93 for a high at Philly International Airport. The day featured sunshine and then some fair weather cumulus clouds once we reached our convective temperature(the estimated temperature that the surface must warm to for clouds to develop); there were some showers and severe thunderstorms to the north and west, but as the sun set the energy source that fueled these storms was gone.
Overnight there will be a few clouds(maybe a sprinkle, but most storms have fallen apart and we're just left with the cloud debris) with lows in the middle 70s; Tuesday will be hazy, hot, and humid with showers and thunderstorms to the north and west as highs will be in the middle 90s. The cold front will be slow moving and won't clear out the region until Wednesday evening so the day itself will feature more showers and thunderstorms with highs around 90(thus this should make that Day 3 of 90 degrees or higher calling it a heat wave).
Showers and thunderstorms finally come to an in the early morning hours on Thursday and we'll had clearing by mid-morning as drier air works in from the west; highs in the afternoon on Thursday will be in the middle to upper 80s(which is seasonable). Come Friday we'll be in the middle 80s with plenty of sunshine until the late afternoon as a short wave will pass by to the south and provide some clouds into the overnight. It's all gone by sunrise Saturday morning so there will be plenty of sunshine with highs once again in the middle 80s.
Come Sunday we'll get into that stickier milder southerly flow so highs will be around 90 with showers and thunderstorms by the late afternoon with a cold front trying to progress eastward; it sticks around for Monday with highs in the lower 90s.
So that's it for now; remember that you can always follow my 7-day forecast(any time) at