Manassas, Georgia Weather Forecast Discussion

667
FXUS62 KCHS 051028
AFDCHS
Area Forecast Discussion
National Weather Service Charleston SC
628 AM EDT Fri Sep 5 2025
.SYNOPSIS...
High pressure will extend across our area through late this
week. A cold front will move through from the northwest late
Sunday, then stall offshore through the middle of next week.
&&
.NEAR TERM /THROUGH TONIGHT/...
Weak high pressure will remain over the area today and tonight
while aloft we remain on the western edge of a broad
anticyclone. Mostly sunny skies will exist today with rain-free
conditions and highs in the lower 90s. Daytime dewpoints will
again mix down into the mid 60s so heat indices won`t be a
concern. Low temps tonight will be in the upper 60s.
&&
.SHORT TERM /SATURDAY THROUGH MONDAY/...
The mid-levels will consist of a trough stretching from the Great
Lakes Region into the Lower MS Valley Saturday morning.
This axis should gradually shift eastwards with time, passing over
the East Coast Sunday night, then offshore by Monday.
Saturday: At the surface, high pressure will extend across our
area. The NBM keeps our land areas dry during the day and into
the night, with any showers limited to the coastal waters far
offshore. Highs will be in the lower to middle 90s, except
cooler at the beaches. Lows will be around 70 degrees to the
middle 70s closer to the beaches.
Sunday: A cold front will approach from the northwest during the
day. Moisture increases ahead of the front, with PWATs rising >1.5"
late in the day and overnight. The NBM has chance POPs during the
afternoon and into the evening. Temperatures should peak in the
upper 80s across the Charleston Tri-County, to the mid 90s near the
Altamaha River, except cooler at the beaches. Even with these
temperatures and moisture, there`s not a large amount of
instability, meaning we can have thunderstorms, but it`ll be hard to
get any strong to severe storms. QPF should generally be ~0.5" or
less across our SC counties, with lower amounts across our GA
counties. The showers/thunderstorms will diminish during the evening
as the front moves through, with the overnight being dry. Lows will
range from the mid 60s to the lower 70s.
Monday: The cold front will be offshore early in the morning, then
transition into a stationary front by the afternoon. Meanwhile,
high pressure will build in from the northwest during the
morning, then pass to our north during the day. The periphery of
the high should bring our far inland counties dry conditions.
But the NBM keeps chance POPs along and near the coast with low
QPF amounts. Highs will be cooler, ranging from the lower 80s to
the middle 80s.
&&
.LONG TERM /MONDAY NIGHT THROUGH THURSDAY/...
High pressure will prevail either inland or to our north while a
stationary front remains to our south and southeast. The NBM keeps
the highest POPs offshore, with the lowest POPs far inland.
Temperatures will be a few degrees below normal.
&&
.AVIATION /12Z FRIDAY THROUGH TUESDAY/...
VFR will generally prevail. Shallow ground fog may develop late
tonight, primarily at KSAV.
Extended Aviation Forecast: There is a low chance for some morning
fog and stratus Sunday morning, mostly inland. The next chance of
showers and thunderstorms will be Sunday afternoon, perhaps
persisting into Monday and Tuesday afternoons. Ceiling restrictions
are possible Sunday night and Monday, as a front sags into the
area.
&&
.MARINE...
Quiet marine conditions through tonight as the region remains
under the influence of weak high pressure.
High pressure will extend across our area through Saturday,
leading to tranquil marine conditions. A cold front will
approach from the northwest on Sunday, then move through the
waters Sunday night. Expect a surge of northeast winds late
Sunday night, persisting through Tuesday night. Small Craft
Advisories will be needed for all of our ocean waters during
this time period for winds and seas, and perhaps for the
Charleston Harbor due to winds. Conditions should improve on
Wednesday, with winds and seas trending lower.
&&
.TIDES/COASTAL FLOODING...
Astronomical tide levels will continue to increase through the
weekend, getting as high as 6.4 ft MLLW by the Sunday evening high
tide cycle. However, winds will not be particularly favorable
for large tidal departures during this time period but observed
peak tides could still top out around 7 ft MLLW at Charleston
each evening through Sunday.
Astronomical tide levels will remain high through the middle of next
week thanks to the upcoming full moon (9/7) and perigee (9/10). A
notable surge of northeast flow along the coast is expected to
produce increased tidal departures through at least the middle of
next week which will result in an increasing probability of at least
minor coastal flooding along the entire southeast GA/SC coast.
&&
.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...None.
&&
$$
NEAR TERM...JRL
SHORT TERM...
LONG TERM...
AVIATION...JRL
MARINE...

NWS CHS Office Area Forecast Discussion