3K would work in ern areas.
So If I were in metro BOS I want two things.
1) Ideally a consolidated low like the 12z NAM yesterday parked near the elbow or even in CC Bay. That works.
2) If we dong, get the low to pivot into just east of BOS like last nights runs did.
I honestly can see arguments for any solution, even ones pivoting into metro west. You are trying to time the mating of the nrn and srn stream abd where that occurs will dictate both the inv trough and also where the low pivots.