CTP’s 11:24 pm write up doesn’t really expect warning level snows north of Lancaster. They say it “may” be needed but not expected.
Latest ensemble probabilities have increased likelihood for
warning criteria snowfall across our southern tier Sun-Mon, with
sufficient confidence to hoist Winter Storm Watch headlines
from Somerset to Lancaster Counties. This in good collaboration
with LWX and PHI and latest Snowprobs, which are showing nearly
categorical likelihood of exceeding Advisory criteria and 65-70%
likelihood of exceeding 6" over York and Lancaster Counties.
Watches *may* need to be expanded slightly northward in time,
but it appears that most of the remainder of central PA south of
I80 is looking at Advisory criteria snow, and at this time no
ptype issues to speak of.