CTP afternoon disco talks about a sharp snow to rain gradient between 1-80 and 1-81 with only a brief period of freezing rain expected for first storm.
Models are coming to a consensus on
general gist of this system, with significant snowfall
accumulations (>6" possible) primarily north of I-80 and a
wintry mix over to rain in SE PA. There is the chance for a
brief period of freezing rain in the far SE zones Tuesday
morning, but amounts seem to not be too significant at this
time. Models have been trending warmer, so this is an area to
watch. Expect a tight gradient between the heavier snow amounts
and areas with no snow, but some uncertainty exists in where
this gradient will set-up. This could mean the difference
between little to nothing or several inches of snow for areas
between the I-80 and I-81 corridors, so we will keep an eye on
model updates and the pattern in the gradient