GFS and NAM were doing the same thing last time.. It's a 984mb low off of Ocean city 16 days from our coldest of the year.. good chances imo. It may end quickly though.
20z Hrr brought the heavy snow totals furthest SW of all model runs so far, 6" to Frederick, MD.
I'm pretty comfortable with where I am in Harford Co. to get 4-6".