Fort Mill, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

893
FXUS62 KGSP 100551
AFDGSP

Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
151 AM EDT Sun Aug 10 2025

.SYNOPSIS...
A more typical summertime pattern resumes today and into next week
as daily chances for afternoon thunderstorms return. Temperatures
remain at or below normal, but gradually warm through the week.

&&

.NEAR TERM /THROUGH TONIGHT/...
As of 150 AM: A large patch of stratocu continues across the Upstate
and NE GA this morning but has dissipated over NC. Expect the clouds
to spread back across the area as moisture returns under the wedge
inversion. There will be enough isentropic lift for spotty showers
early this morning, mainly along and south of the I-85 corridor.
Patchy fog is possible, especially where clouds are slower to
redevelop.

An inverted trough near the GA/SC coast and the cold air damming
high remain in place through the period. A moist southeasterly flow
continues through the period as well. Isentropic lift remains
relatively weak this morning but increases this afternoon and
continues tonight. Weak instability develops this afternoon as weak
heating takes place. Expect scattered showers to develop during the
afternoon and move northeast across the area. Can`t rule out a rogue
lightning strike or two but overall chance of TSRA is low. QPF will
be on the lighter side with spotty moderate values. Highs will again
be below normal with the clouds and scattered showers, similar to
Saturday`s highs.

Scattered showers continue overnight in the continued upslope flow
and isentropic lift. Again, a rogue lightning pulse is possible
during the evening with similar QPF values during the day. Lows will
be near normal.

&&

.SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/...
As of 120 AM EDT Sunday: Starting off the work week with a return
the more typical summertime pattern. The surface high pressure
across the northeast is very slow to depart, but the Bermuda high to
the south starts to amplify and become the dominant system over the
area by Monday. Synoptically, the ridge persists over the eastern
CONUS and by Tuesday, the flow aloft becomes more broad as the
trough out west weakens. Moisture advection continues as surface
winds turn more E/SE, keeping the 2 inch PWAT line along and south
of I-85 through the period. The added moisture into the area and
daily increased instability bumps up PoPs into widespread showers
and thunderstorms for a few locations to the south (70-85%). The
better chance for these storms looks to remain in the southern zones
along and south of I-85. Given the weakened flow aloft, not
expecting much on the severe side, but areas that receive multiple
rounds of storms could have an isolated flash flood risk. By
Tuesday, the return of more typical pop-up convection continues,
bringing chance PoPs (50-70%) across the entire CWA. Temperatures
warm but still remain below normal for the short term.

&&

.LONG TERM /WEDNESDAY THROUGH SATURDAY/...
As of 125 AM EDT Sunday: Not a whole lot of change for the extended
period. A modest ridge over the southwest propagates eastward and
amplifies over the central/southeast CONUS by next weekend. This
broad flow aloft keeps the area in the typical summertime pattern
with daily chances for showers and thunderstorms. The CWA stays
locked into the western fringe of the surface high off the coast and
allows for a constant stream of moisture to envelop the area. PoPs
are more consistent and remain around chance (40-65%) each afternoon
through the end of the week. The higher chances will be in the
mountains as usual. QPF is minimal but areas that receive multiple
showers or thunderstorms could see an isolated flash flood risk.
Temperatures continue to rise toward the normal range through the
period with a few locations south of I-85 getting back into higher
heat indices by midweek. Still looks like the heat indices will
remain well under any Heat Advisory Criteria at this point.

&&

.AVIATION /06Z SUNDAY THROUGH THURSDAY/...
At KCLT and elsewhere: A high-based stratocu deck will keep broken
VFR ceilings across most of the area early this morning, though it
may be spotty in some locations early on. MVFR cigs move in from the
SE near daybreak and these continue into early afternoon before
lifting to low VFR. Can`t rule out some MVFR vsby before daybreak as
well. Increasing moisture and weak instability develop by afternoon
leading to scattered showers continuing into the evening, so PROB30s
in place for these. Can`t rule out a rogue lightning strike, but
chance low enough to keep precip as SHRA for now. Generally isolated
showers continue overnight with VCSH for these. MVFR cigs redevelop
during the evening as well. NE wind continues through the period, SE
at KAVL. A rogue gust is possible as well. Winds may toggle to ESE
at KCLT overnight.

Outlook: Daily diurnal showers and thunderstorms with associated
restrictions return across the area each day this week.

&&

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

&&

$$

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