The 1 inch of Liquid Precip is literally 40-50 miles south of NYC... Even without model movement, these storms usually end up being naturally 20-25 miles NW Of final models..
The upper air (850 and 925 temps) are the same or slightly colder in the NYC area than down in Phily (where it is snow) so well see what the BL temps do once the precip starts. Temps will need to cool 3-5 degrees