Lockhart, South Carolina Weather Forecast Discussion

471
FXUS62 KGSP 092339
AFDGSP
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
739 PM EDT Tue Sep 9 2025
.SYNOPSIS...
Dry high pressure will persist over the region through this weekend.
We will have a gradual warming trend into early next week as an
upper trough moves off the East Coast and an upper ridge moves in
from the west.  Dry weather will continue into the weekend.
&&
.NEAR TERM /THROUGH WEDNESDAY/...
As of 736 PM Tuesday: No changes. Fair weather continues. Scattered
remaining stratocu over the mtns should dissipate with
sunset. Cirrus to the east will translate further east thru
midnight. Temp trend looks good, but dewpoints were adjusted in
some locations.
Otherwise...broad upper troughing will continue to envelop the
eastern CONUS east of the Mississippi River through tomorrow. At
the surface, a massive sprawling high remains draped from eastern
Canada down the east coast and Appalachians with dry northeast
flow will prevailing and PWATs well below an inch. This will keep
dry and benign weather in place with temperatures below seasonal
averages. Overnight lows tonight are expected to fall into the
upper 40s to mid 50s with a warming trend beginning tomorrow as
afternoon highs rebound into the upper 70s to low 80s. Otherwise,
a few instances of mountain valley fog will be possible, especially
across the Little Tennessee Valley.
&&
.SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY/...
As of 1256 PM EDT Tuesday: An upper low will drift across Atlantic
Canada through the period, while a surface high sets up shop over
Quebec and New England. Expect dry north-northeasterly flow to
filter in with baggy upper troughiness overhead, helping to keep
cooler thicknesses in place. As a result, sensible weather remains
dry through the end of the workweek, with no mentionable PoPs in
the forecast. Temperatures will be 5-10 degrees below normal for
overnight lows thanks to radiational cooling, while afternoon highs
will be only a degree or two below-normal as strong insolation
reaches the surface under mostly sunny skies.
&&
.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
As of 120 PM EDT Tuesday: Surface high still in control going
into the upcoming weekend, while the flow aloft remains virtually
unchanged. Guidance show a weak backdoor front sliding through
the area Saturday night into Sunday, but will at most provide
some cloud cover and a wind shift. Otherwise, the upper pattern
diverges slightly closer to the end of the period as there is
some support for a closed upper low developing somewhere in the
eastern CONUS, but differ in the exact placement. This could be
the setup to bring our next rain chances, but confidence is low
at this time. Temperatures will uptick to near-normal through the
weekend, with some potential of climbing a few ticks above normal
by the end of the forecast period.
&&
.AVIATION /00Z WEDNESDAY THROUGH SUNDAY/...
At KCLT and elsewhere: Prevailing VFR at all terminals not named
KAVL through the period, courtesy of high pressure. At KAVL, the
few remaining stratocu should dissipate with sunset, thereafter,
it should be clear. Guidance suggests a similar situation tonight
compared to this past morning, when IFR restrictions developed in
the valley. Will start out with a prevailing MVFR and temporary
IFR for vis and go from there. The fog/stratus should dissipate
by 13Z. Wind will remain generally light and northerly.
Outlook: Dry and mostly VFR through the end of the week, except
for the steadily increasing potential for morning mountain valley
fog and/or low stratus.
&&
.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...None.
SC...None.
&&
$$
SYNOPSIS...DEO
NEAR TERM...PM/TW
SHORT TERM...CAC
LONG TERM...CAC
AVIATION...PM

NWS GSP Office Area Forecast Discussion