995
FXUS62 KCHS 021451
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
1051 AM EDT Tue Sep 2 2025

.SYNOPSIS...
High pressure will extend across the area through late week. A
cold front will approach from the northwest late in the
weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
Late this morning: Overall, another quiet day on tap. The
forecast area will be situated between high pressure inland and
an area of low pressure off the east coast of FL. This will
continue to drive NE flow across the area with the strongest
winds along the coast. Gusts to around 20 mph are expected.
There is more moisture available today, as evidenced by the 12z
KCHS RAOB precipitable water value increasing to 1.25" over the
last 24 hours. But, the area remains largely devoid of any
forcing and little to no diurnal convection is expected today.
Hi-res models suggest that a few showers could develop this
afternoon, mainly along the GA coast. Temperatures are expected
to be a few degrees warmer than Monday, but still on the order
of 4-5 degrees below normal.

Tonight: Very little change occurs in the overall pattern with
high pressure persisting, but slowly weakening overnight. Expect
all areas to remain dry through the night. Light northeasterly
winds under mostly clear skies should support overnight lows
generally in the low-mid 60s inland to upper 60s/around 70 near
the coast (warmest along the beaches).

&&

.SHORT TERM /WEDNESDAY THROUGH FRIDAY/...
Weak high pressure will remain northeast of the region
Wednesday through Friday. A shortwave moving through late
Thursday afternoon could spur isolated convection across coastal
southeast GA. Otherwise, a relative lack of forcing and limited
deep moisture should maintain mostly dry conditions through the
period. Temps will rise a few degrees each day as upper heights
increase.

&&

.LONG TERM /FRIDAY NIGHT THROUGH MONDAY/...
Mainly dry and warm weather expected through Saturday due to
deep layered ridging. A backdoor cold front may drop into the
area Sunday, pushing south as a wedge of high pressure builds
from the north. A wet pattern may develop by early next week as
coastal troughing sets up.

&&

.AVIATION /15Z TUESDAY THROUGH SATURDAY/...
VFR conditions will prevail at CHS/JZI/SAV terminals through
12Z Wednesday. North/northeast winds could gust up to 15-20 kt
at all terminals mid-late morning into early/mid afternoon.

Extended Aviation Forecast: VFR.

&&

.MARINE...
Today: The pressure gradient remains enhanced across local
waters between high pressure inland and low pressure offshore
early morning, likely to be slow to relax during the day. As a
result, Small Craft Advisories have been extended across all
nearshore waters until 2pm. Outer Georgia waters will continue
to see Small Craft Advisory level conditions through the day. In
general, northeasterly winds should decrease to the 15-20 kt
range across nearshore waters late morning, although a few gusts
to 25 kt are possible into early afternoon. Seas should also
subside from 4-6 ft to 3-5 ft across nearshore waters by the
afternoon. Further offshore, Small Craft Advisory level
conditions are expected to persist for much of the day as the
pressure gradient remains slightly stronger away from the coast
and seas are slower to subside. Here, northeasterly winds in the
20-25 kt along with seas in the 5-6 ft range are expected.

Tonight: Low pressure across the Atlantic will begin to drift
further offshore, resulting in a a slightly weaker pressure
gradient across local waters. Winds should decrease and seas
subside as a result. In general, northeasterly winds in the
15-20 kt range this evening should weaken to 10-15 kt across a
majority of local waters after midnight, although a few gusts to
20 kt remain possible across outer Georgia waters. Seas will
generally range between 2-4 ft across nearshore waters and 3-5
ft across outer Georgia waters.

High pressure will prevail Wednesday through Saturday, keeping
marine conditions below advisory levels.

Rip Currents: Moderate swell, enhanced onshore flow, and above
average tidal range will result in a Moderate Risk for rip
currents along all beaches today.

&&

.TIDES/COASTAL FLOODING...
The astronomical tide levels steadily increase through the week
though the positive anomalies should start to come down by Wed
or Thu as the NE flow turns to the SE and weakens. We could come
close to 7.0 ft MLLW at Charleston for the late afternoon/early
evening high tides Wednesday through Saturday.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...Small Craft Advisory until 2 PM EDT this afternoon for AMZ350-
     352-354.
     Small Craft Advisory until 8 PM EDT this evening for AMZ374.

&&

$$

NEAR TERM...BSH/DPB
SHORT TERM...JRL
LONG TERM...JRL
AVIATION...DPB/JRL
MARINE...DPB/JRL