NWS mentioned some decent upper level support as well.
Another relative lull in snow is possible Wednesday afternoon,
before a more significant shortwave trough and reinforcing cold
front drop in from the Great Lakes for New Years Eve into New
Years Day. Renewed cold advection and WNW flow will likely add
lake and upslope influences. There may even be upper support
from the left exit region of an upper jet diving into the Middle
Ohio Valley. Along with better moisture, this sets the stage
for an accumulating snow across the region Wednesday afternoon
into Thursday. Current first- guess snow totals would have 6-7
inches in the ridges from Fayette County on south, and 2-5
inches elsewhere. Given these totals and the potential impact to
holiday festivities, a Winter Storm Watch is being issued for
the ridge zones from Wednesday afternoon into Thursday morning.
Snow would then begin to taper off Thursday afternoon as
lingering lake effect/upslope snow showers.