From looking at major I-95 cities RIC north, the absolute monsters may disappear more slowly than big storm frequency or average snowfall. Below are the current numbers I have for 10 sites RIC to HUL, biggest on record with dates, and 15th biggest. The first column values are remarkably similar once north of Potomac (RIC shown for contrast) but significantly different for #15s.
Site BIggest Date Fifteenth
RIC 21.6" Jan. 1940 10.9"
DC 28.0" Jan. 1922 12.4" "Knickerbocker storm"
BWI 29.2" Jan. 2016 14.1"
PHL 30.7" Jan. 1996 14.3"
NYC 27.5" Jan. 2016 17.5"
PVD 28.6" Feb. 1978 14.7"
BOS 27.6 Feb. 2003 18.2"
PWM 31.9" Feb. 2013 16.7"
BGR 30.9" Feb. 1969 18.1"
HUL 29.2" Mar. 1981 16.6"
I'm not sure if the progressively later-in-season timing as one goes north is meaningful. 2nd biggest snowfalls are all over the place: DC thru NYC all Feb, PVD and PWM Jan, and BGR in Dec.