Here is the updated WWA from CTP.
They actually upped the snow/sleet amount in this Advisory to up to 4 inches to the north of I-81.
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
348 AM EST Thu Dec 15 2022
PAZ036-056-057-059-063>066-160000-
/O.CON.KCTP.WW.Y.0026.000000T0000Z-221216T0000Z/
Franklin-Perry-Dauphin-Lebanon-Cumberland-Adams-York-Lancaster-
Including the cities of Chambersburg, Newport, Harrisburg,
Hershey, Lebanon, Carlisle, Gettysburg, York, and Lancaster
348 AM EST Thu Dec 15 2022
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM EST THIS
EVENING...
* WHAT...Mixed precipitation. Snow and sleet accumulations of up
to 4 inches and ice accumulations of up to one tenth of an inch.
* WHERE...Portions of central Pennsylvania.
* WHEN...Until 7 PM EST this evening.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions will impact the morning commute.
* ADDITIONAL DETAILS...The gradient in snow and sleet accumulation
will increase from southeast to northwest across the warning
area with maximum snow and sleet to the north of I-81. Less than
one inch of snow and sleet is expected to the south of US-30. A
changeover to rain is expected in most places from south to
north this afternoon.