The persistent coastal low is going to continue to meander persistently just offshore, and may even begin to edge back southward. That could bring a few more showers into our region as the counterclockwise circulation brings in some ocean air. But because the low isn’t really all that strong, and because dry air near the mountains begins eating away the moisture, not much rain is expected on our end of the state. The brunt of the moist flow is aimed at southern New Jersey the next 2-3 days. What the low will continue to do is keep a generous helping of clouds in our sky — mostly cloudy east of the Blue Ridge, periods of clouds west of I-77, and something in between through the New River Valley — and cool north to northeast breezes. Where it stays cloudy, lows won’t be all that cool, but highs are only going to gradually struggle upward toward 70 through the weekend, maybe popping over it in a few spots. The reason this low isn’t moving anywhere can be seen in part with the “initialization” frame of the GFS model at 850 millibars (a mile up) from earlier Thursday, or the look at current conditions as interpreted from input into the model, linked here. The coastal low’s typical northeast movement is blocked by the high pressure system (the H) offshore due east of New England. That high, in turn, is blocked by the low pressure to its northeast (the twin L’s), which is blocked by the strong high pressure further northeast near Europe. In time the jet stream will erode this blocked pattern like a river slowly eating into its bank, but it will take several days. Expect the same basic weather, with gradually less showers and clouds as the low weakens and drifts away a bit, into early next week.
There is some long-range model disagreement over how the weather pattern evolves late next week, whether we quickly get a shot of colder air from Canada, or if that cold air settles into the central U.S. for a longer time and some warm, dry high pressure builds overhead for a few days. Plenty of time to settle that as we watch the coastal low bob around aimlessly.