And the NWS -Philly overnight added Hunterdon and Morris counties to the advisory list for 2-4" of snow this morning/early afternoon, while the NWS-NYC added Passaic, N. Bergen, W. Essex and the Hudson Valley to the advisory list, also for 2-4" of snow. In addition, the next tier of counties SE of there on the western side of the 95 corridor (Philadelphia, SE Montco, SE Bucks, Mercer and Somerset) are forecast to get 1-2" with up to 3" in the NW parts of those counties. Up to an inch is forecast from about NB through NYC, along 95 (less than SW of NB to Phillly, which has 1-2" forecast).
With this event being a quick hitter with up to about 0.5" of liquid equivalent falling in maybe 6-7 hours from mid-morning through mid/late-afternoon, buts potential is quite high especially along and just NW of 95, where temps will be borderline for accumulating snow (33-35F) during late Feb with the higher sun angle, so snow may only accumulate on the snow on the ground at 32F, with little accumulating on paved surfaces - it would be easy for 95 and just NW to be almost all rain, while it would also be easy for the 95-corridor to be mostly snow with a few inches falling on colder surfaces. Tough forecast with a steep gradient in snowfall from SE to NW. Further NW for the advisory counties, snowfall rates should be enough for impacts on travel.
https://www.weather.gov/phi/
https://www.33andrain.com/topic/2029-february-22-2021-nw-burbs-snow-thump/page/3/