969
FXUS62 KCHS 011759
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
159 PM EDT Mon Sep 1 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/...
Tonight: Very quiet conditions will continue as the pattern
changes very little. Dry northeast flow will continue with high
pressure centered across a large area from the east coast of
Canada to New England. Temperatures will again be below normal,
on the order of 5-6 degrees below normal, and we could again see
a few spots dip into the upper 50s.

&&

.SHORT TERM /TUESDAY THROUGH THURSDAY/...
Surface high pressure to the north remains the dominant surface
feature through Thursday, with broad troughing aloft. As a
coastal low remains well off to the south and some weak
shortwaves passing through the trough aloft, areas near the
coast may see some very scattered showers and very isolated
thunderstorms in the afternoon hours, with probabilities right
below 20%. Otherwise, expect a slow warming trend with highs in
the 80s Tuesday and Wednesday, peaking into the mid 80s to lower
90s on Thursday as the surface high pressure to the north
weakens. Overnight lows in the 60s inland to lower 70s along the
coast.

&&

.LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/...
Weak surface high pressure builds across the southeast into the
weekend, keeping temperatures on the warmer side of normal (now
that we`re in September) in the lower to mid 90s. While Friday
and Saturday are expected to remain dry, chances for diurnally
driven scattered showers, perhaps even isolated thunderstorms if
enough instability builds, return on Sunday out ahead of an
approaching cold front.

&&

.AVIATION /18Z MONDAY THROUGH SATURDAY/...
VFR conditions will prevail at KCHS, KJZI, and KSAV through 18z
Tuesday.

Extended Aviation Forecast: Largely VFR conditions expected to
continue, with next chance for MVFR cigs/vsbys returning
Thursday afternoon with scattered showers/storms.

&&

.MARINE...
Tonight: Elevated northeast flow will continue across the local
waters through the overnight. While wind speeds might diminish
just a bit, we will continue to see at least 15-20 knots with
occasional gusts up to around 25 knots. Seas will remain
elevated as a result, but should diminish a bit by late tonight
to become 3-5 feet across the nearshore waters and 5-6 feet
across the outer waters. Small Craft Advisories remain in
effect, though the nearshore waters are currently set to expire
at midnight. Depending on how seas evolve this afternoon and
evening, the Small Craft Advisory could need to be extended in
time.

Tuesday through Saturday: Northeast flow will continue through
Thursday as surface high pressure remains to the north, though
the gradient and resultant wind speeds should remain below
advisory thresholds. 4 to 5 ft seas on Tuesday lower to mainly 3
to 4 ft seas on Wednesday, though some 2 ft breakers should
start to appear by the evening hours. The flow turns southerly
late week into the weekend.

Rip Currents: A High Risk of rip current remains in effect for
all beaches through this evening. Moderate swell, enhanced
onshore flow, and above average tidal range will result in a
moderate risk on Tuesday.

&&

.TIDES/COASTAL FLOODING...
Persistent NE flow will maintain positive tidal anomalies of
+1.0 to +1.4 ft through at least Wednesday. These could push
tide levels at Charleston within a few tenths of a foot of minor
flood stage during the afternoon high tides. A slight increase
in the anomalies may result in flooding.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...High Risk for Rip Currents until 8 PM EDT this evening for GAZ117-
     119-139-141.
SC...High Risk for Rip Currents until 8 PM EDT this evening for
     SCZ048>051.
MARINE...Small Craft Advisory until midnight EDT tonight for AMZ350-352-
     354.
     Small Craft Advisory until 6 PM EDT Tuesday for AMZ374.

&&

$$

NEAR TERM...BSH
SHORT TERM...APT
LONG TERM...APT
AVIATION...BSH/APT
MARINE...BSH/APT