It was a sunshine-filled day, but then clouds rolled in by the early afternoon and stayed overcast through the evening. We still managed to reach 66 at Philly International after a low of 50(the average high is 59 and the average low is 40).
Overnight we'll have some showers as the remnants of a Mesoscale Convective System(a complex line of storms that spans over 65 miles and stays intact for hundreds of miles) pushing through; the reason the storms are falling apart is because there's stable air across the region thanks to high pressure and an onshore wind. Lows will be in the lower 40s.
Friday we'll still have stable air on top of the region as a warm front draped across the Delmarva will have a hard time pushing northward thanks to Cold Air Damning; highs will just be around 50 with an easterly wind. There will also be light showers by the afternoon as the warm front eventually pushes northward by the evening.
Overnight into early Saturday morning temperatures will hold(and may even rise a little) before the cold front pushes through; this will allow some thunderstorms(albeit no widespread severe weather like the Plains) to form and then some fog before daybreak. Come the late morning and afternoon it will be sun-filled with highs in the lower 60s. Sunshine will also be on tap for Sunday with highs in the upper 50s before we cloud up overnight into Monday as another system pushes into the region.
Don't forget that you can check out the rest of the 7-day forecast ANY TIME at www.scottderekwx.com/forecast.html !