Clemson, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

993
FXUS62 KGSP 111442
AFDGSP

Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
1042 AM EDT Fri Apr 11 2025

.SYNOPSIS...
Scattered showers and thunderstorms continue today. Dry conditions
return this weekend and continue into Monday. Showers will be
possible across the mountains Monday night as another fast moving
systems passes through the region. Thereafter, dry weather continues
into late week.

&&

.NEAR TERM /THROUGH TONIGHT/...
As of 1030 AM EDT Friday: Broad/deep upper trofing will continue to
dig southward across the Southeast thru the near-term period. By 12Z
Saturday, the upper trof axis should be centered right over the
area. At the surface, weak low pressure will become more organized
over our area today and then lift NE and off the Atlantic Coast
later tonight and into Saturday. This synoptic setup will make for
continued unsettled weather this aftn/evening as upper level thermal
trough and deformation zone progress across the area. Resultant
steep mid-level lapse rates and deep-layer QG forcing will support
scattered-to-numerous coverage of convection this afternoon as
conditions modestly destabilize. The sfc low will bring low-level
flow around and out of the W to NW during the aftn, so the better
instability will likely shift east. This should keep the severe
threat just to our east as well, but a strong storm or two will be
possible, mainly southeast of I-85, where sbCAPE is forecast to
approach 1000 J/kg and deep layer shear of 25-35 kts is expected.
Stronger storms will be capable of producing gusty winds and
especially small hail in light of low freezing levels. In addition,
temps will likely be cold enough to produce some light snow over the
higher peaks and ridges across the NC/TN border counties tonight
into early Saturday. Any snow accums should be negligible.
Otherwise, highs temps today will be cool for mid-April and mainly
in the 50s over the mtns and 60s across the lower terrain.

&&

.SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/...
As of 202 AM Friday: The forecast continues Saturday with a deep
trough draped along the East Coast with the trough axis situated
east of the area. This will place the western Carolinas and
northeast Georgia within a dry northwest flow regime. Low heights
and modest cold advection will foster another cool day with daytime
highs in the mid 50s to mid 60s. The airmass begins to modify Sunday
as the trough swings offshore and heights rise as upper ridging
builds into the Appalachians. Resulting highs are forecast to return
to the low 60s to low 70s. Overnight lows will remain on the cool
side, however, with favorable radiational cooling, especially Sunday
morning. At or below freezing lows will be possible across the
mountains with mid to upper 30s east. A freeze watch may eventually
be warranted Sunday morning for the southern mountains where the
frost/freeze program has begun.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...
As of 218 AM Friday: The synoptic pattern remains progressive
heading into next week with a shortwave trough quickly swinging
across the Northern Plains and into the Great Lakes region by
Tuesday morning. The warmest day of the period will be on Monday
when heights are the highest along with compressional warming ahead
of an advancing cold front. Resulting high temperatures are expected
to climb into the low to mid 80s. The cold front, extending from a
surface low over southern Ontario, will approach the mountains
Monday night with a chance for showers along the immediate Tennessee
border. Confidence is low as to how far east any showers may make it
with most guidance in generally good agreement that showers will
struggle to make it east of the mountains. Another shot of cool and
dry air arrives Tuesday, but may be short lived as the progressive
pattern reloads. A series of shortwave troughs is depicted Thursday
into Friday with a return of rain chances.

&&

.AVIATION /15Z FRIDAY THROUGH TUESDAY/...
At KCLT and elsewhere: Winds should remain light and vrb to calm
at most sites thru much of the morning. Expect MVFR to IFR cigs
and vsby to persist into mid-morning, with low VFR for all taf
sites by the afternoon. Cigs at KHKY may remain MVFR well into
the afternoon, but continue to err on the optimistic side with
BKN035 starting at 17z. Yet another round of showers and thunder-
storms is expected during the afternoon and into the evening across
the area today. I`ve handled this with prevailing SHRA and PROB30s
for TSRA beginning around 18z at most sites. Otherwise, winds pick
up from the SW by late morning and turn NW during the afternoon.

Outlook: Dry high pressure returns over the weekend and lingers
into Monday. Another cold front may bring scattered showers and
associated restrictions on Tuesday.

&&

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

&&

$$

SYNOPSIS...TW
NEAR TERM...JDL/JPT
SHORT TERM...TW
LONG TERM...TW
AVIATION...JPT