"While the low track along I-95 will allow WAA to cause p-type to transition to rain from snow well inland, this will not be the case in the higher terrain where WPC probabilities for 6 inches are above 70% from near Asheville, NC through the Laurel Highlands of PA, and it is likely many locations will receive more than 1 foot of snow."
https://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=qpfhsd
Mention of 1 foot is probably for the north.