Greenwood, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

309
FXUS62 KGSP 211030
AFDGSP

Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
630 AM EDT Wed May 21 2025

.SYNOPSIS...
Dry, warm and breezy behind a departing cold front today. Cooler
conditions return and drier conditions continue Thursday into the
first half of the weekend. Shower and thunderstorm chances return
late this weekend, lingering into early next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
As of 620 AM EDT Wednesday...

Key Messages:

1) Drier Conditions and Breezy Winds Expected Behind a Cold Front
Today

2) Warm with Above Normal Highs Returning this Afternoon Despite the
Cold Front

3) Breezy Winds Continue Across the Mountains Tonight

Seeing some low stratus and patchy fog develop across much of the
forecast area this morning so increased cloud cover this update. Fog
and stratus should gradually lift by mid-morning as wind speeds
increase. Otherwise, mostly sunny skies will return by late this
morning.

Although shower and thunderstorm activity pushed east of the
forecast area earlier this morning, the actual frontal boundary will
not push east of the area until early this afternoon. Dewpoints will
gradually lower as drier air works its way into the region behind
the front, allowing for a less humid day. Despite the frontal
passage, highs will end up ~5 degrees above normal thanks to mostly
sunny skies and NW downslope flow offsetting cold air advection
behind the front. Breezy winds are expected with gusts ranging from
20-30 mph for most locations. However, elevations above 3,500 feet
can expect gusts ranging from 35-40 mph. Gusts will gradually
diminish east of the mountains this evening but will remain elevated
over the mountains tonight. Lows tonight will end up ~7-10 degrees
cooler compared to this morning`s lows, but will still end up
slightly above normal despite mostly clear skies.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
Key Messages:

1) Slight chance for showers and gusty winds in the mountains on
Thursday

2) Temperatures begin to cool down Thursday

As of 140 AM EDT Wednesday: Mostly dry and quiet for the short term.
Guidance from the GFS/EURO puts a strong upper low over the Great
Lakes with a broad trough dipping southward. By Thursday, a tight
gradient at the 850mb level could bring some gusty winds across the
area, especially the mountains. At this time, the higher elevations
have about a 30-50% chance of exceeding 45 mph, with other locations
in the mountains being less than 20%. Confidence remains medium that
winds will remain below criteria for any product issuance at this
time. There is a slight chance for a very brief shower as the trough
scoops down and a swath of DPVA crosses the mountains on Thursday.
Current guidance chances keep showers in the (20-40%) along the
TN/NC border. This continues through Thursday night before becoming
dry throughout the rest of the period. Additionally, the drier,
cooler air brings temperatures closer to normal by Thursday and
begins a cooling trend into Friday.

&&

.LONG TERM /SATURDAY THROUGH TUESDAY/...
Key Messages

1) A drier air mass keeps temperatures below normal into Memorial
Day Weekend

2) Shower and thunderstorm chances are possible Sunday into Monday

As of 200 AM EDT Wednesday: Saturday starts off the extended quiet
with a more unsettled pattern emerging through the holiday weekend.
Long range guidance essentially sets up a ridge out west and allows
for NW upper flow that becomes more zonal by Sunday. Embedded in the
upper flow appear to have multiple shortwaves, bringing pockets of
DPVA sliding toward the area. Some guidance still hint at possible
shower chances, especially across the mountains, Sunday and into
Monday. The QPF response isn`t much at this time as there is still
too much uncertainty. However, the pattern becomes more unsettled.
Temperatures for the extended look near normal with a slow, gradual
warming through the beginning of the week. There is also a signal in
the guidance hinting at even warmer, above normal temps toward the
end of the period.

&&

.AVIATION /12Z WEDNESDAY THROUGH SUNDAY/...
At KCLT and elsewhere: Dry conditions have returned across the
terminals this morning and will continue through the 12Z TAF period.
LIFR/IFR/MVFR cigs and IFR to MVFR vsbys are in place across many of
the terminals this morning. KAND and KCLT remain VFR but could still
see fog and lowering cigs develop through daybreak. Restrictions
should lift by mid-morning as wind speeds gradually increase.
Breezy winds will develop this morning, lingering through this
evening east of the mountains. Breezy winds will stick around at
KAVL through the end of the TAF period. Gusts will range from ~18-26
kts. Winds will gradually turn W/WNW early this morning, remaining
at this direction through the rest of the TAF period.

Outlook: Slightly stronger wind gusts return Thursday across the
terminals with only low-end gusts expected on Friday. VFR and mostly
dry through the first half of the weekend. Shower and thunderstorms
chances return late this weekend into early next week. Mountain
valley fog and low stratus are possible each morning.

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...None.
SC...None.

&&

$$

SYNOPSIS...AR
NEAR TERM...AR
SHORT TERM...CP
LONG TERM...CP
AVIATION...AR