To be honest, I don't see where it will get cold enough to support snow. If the system is stronger than modeled and is further north and west than modeled, then more warm air will be available as well. It is still in the low 40's in Chester Co so I am sure it is warmer south of me.
The radar looks very interesting to me. The moisture to the WV/VA border seems to be filling in from the south west. You can see the draw of the moisture into the system. At the same time the moisture continues a slow march north towards PHL. Yes it is not hitting the ground but I believe the sheer volume is sufficient to cool and moisten the atmosphere. I'll make a call that PHL will see at least one inch based on what I see on the radar. The cutoff will be sharp wherever it occurs but at this point I'll say it’s just north and east of PHL.