The NWS AFD is not all suggesting they are thinking high end with this one.
.SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY/...
Fair and seasonable weather with diminishing winds appear
likely Friday, as low amplitude ridging builds over the state.
Focus shifts quickly to Friday night as a light snowfall is
expected over most of central PA. All medium range guidance
indicates a digging upstream trough will approach from the GLAKS
Friday night, with a weak associated surface low tracking along
the NC/VA border, then out to sea by Saturday morning.
Sfc low track favors heaviest snowfall well south of the Mason
Dixon line, perhaps even south of D.C. However, strong
frontogenetical forcing in the left exit region of a 120kt jet
streak is likely to result in a period of light snow across
Southern PA Friday night. We expected all snow from this
evening, with highest chances of precipitation overnight into
Saturday morning.
Confidence isn`t high enough for headline issuances as per WPC
and LWX collaboration. 2" amounts are becoming increasingly
likely over our southeast, and there is less than a 30 percent
chance for 3-4 inches in spots. Light snow may linger
throughout the day on Saturday, but will become confined to the
Alleghenies by Saturday evening in a cold advection pattern.