A large, elongated area of high pressure is located over the near shore Atlantic Ocean from Coastal Maine to the Coastal Carolinas. A prolonged period of south to southeasterly winds will continue to draw warm and humid air from the deep south. You see the effects outside and will continue to see mostly cloudy skies with only a few breaks of sunshine through at least Friday. Temperatures will slowly climb and by Friday it will be uncomfortably warm and humid. There will be daily chances for scattered showers and isolated thunderstorms.
A cold front will eventually cross the Appalachians and cross the I-95 corridor and deliver drier air and clearing skies. But the big question is when is "eventually"? And the truth is no one can say with any real confidence. There is a chance the front will cross the area late Friday or early Saturday but equal or better chances are it won't happen until Sunday. The timing will determine the weekend weather. As the week progresses we are hopeful to latch onto some key indicators that will allow a reliable weekend forecast. But we are not there yet. It will be very warm and humid this weekend, regardless. The bigger question is the probability of rain on Saturday and Sunday. At the moment we are holding with a 40 to 50 percent probability.