Here's the latest forecast update too. My favorite part is the bolded...
.NEAR TERM /THROUGH FRIDAY/...
As of 500 PM EST Thursday: New guidance trickling in continues to
trend cooler and wetter, and while the NAM remains a cold/wet
outlier, other 18z data shifting that direction lends confidence to
a slight uptick in snowfall amounts. Will continue to be a battle
between the cold air vs. moisture as is typically the case, but with
the moisture expected to now make it farther into the mountains, the
prudent course of action was to go ahead and hoist a Winter Weather
Advisory for the upslope areas of the SW mountains, including the
GA/SC mountains. Because NC`s advisory criterion is 2" in 12h and we
have that over the South Mountains in Cleveland/Burke/Rutherford
Counties, included those areas, but most locations <1500ft will be
hard pressed to see anything more than a trace/dusting at this time
(uh, with the current forecast that is - if the trends continue that
may be pushed up as well). Concern is that in the prime overlap area
of the SC mountains (QPF and temps), current forecast is getting
close to warning criteria. Will continue to watch trends through the
evening and especially with the overnight forecast.
Otherwise, guidance is coming into better agreement regarding the
precip potential for tonight and Friday. Deep moisture moves in this
evening with decent upper divergence from the right entrance region
of the upper jet. Short waves move over as the upper trough deepens
to the west. Low level isentropic lift develops as well, but remains
relatively weak with abundant moisture. Despite an overall cooling
trend in forecast temps and surface wet bulb values, they remain
above freezing through the night outside of the mountains, but do
fall below freezing across the mountains. Of course, precip chances
are lower where temps are colder since those locations are farther
away from the better forcing. Therefore, have snow developing in the
colder locations with mainly rain elsewhere. Forecast soundings show
the freezing level dropping low enough for snow to mix in north of I-
85 with a change over possible across the Northern Foothills. QPF is
light but could be enough for around half an inch of snow along and
near the NC/GA to NC/SC border mountain locations. Snow would be
less across the rest of the mountains.
Categorical precip chances continue generally along and south of I-
85 Friday with likely chances north of there across the foothills to
along the Blue Ridge. Good chance PoP west of there. Temps and
surface wet bulbs remain cold enough for the precip to fall as snow
across the mountains with a transition zone across the NC Foothills.
Outside of these areas, freezing levels may fall low enough for snow
to mix or possibly even briefly change over early in the morning
mainly along and north of the I-85 corridor. QPF has increased on
some of the guidance runs which increases the potential for advisory
level snow across the NE GA and Upstate mountains, along with the
Southern Mountains and possibly portions of the NC foothills. After
final national guidance is in, we may need to update to post an
advisory for those locations. While these accums would develop in
grassy and elevated areas, it is still questionable how much
accumulates on roads given the recent warmth and sunshine. Locations
where the precipitation will be mixed or only a brief change over,
no significant accums are expected with any small amounts limited to
grassy or elevated areas.