722
FXUS62 KCHS 012323
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
723 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 /UNTIL 6 AM TUESDAY MORNING/...
Tonight: Quiet conditions will continue as a wedge of high
pressure at the surface remains centered over the centered over
the northeast U.S.. This will keep low level northeast flow,
with relatively dry, cooler conditions. Temperatures by morning
are again expected to be below normal, and more like early
October. Lows in the upper 50s to lower 60s well inland, and mid
to upper 60s rest of the area.

&&

.SHORT TERM /6 AM TUESDAY MORNING 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 MONDAY/...
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 /00Z TUESDAY THROUGH SATURDAY/...

VFR conditions will prevail at KCHS, KJZI, and KSAV through 00z
Wednesday. Guidance indicates that winds will become a bit gusty
tomorrow morning from the northeast, with gusts 15 to 20 kts.
Then winds veer more east-northeast in the afternoon and likely
becoming less gusty.

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: Winds/seas remain elevated across much of the Atlantic
waters are marginal SCA conditions continue. The near shore
waters are currently expected to fall below SCA around midnight,
but will continue monitor if the SCA needs to be extended a bit
into the early morning hours of Tuesday. Seas starting at 4 to 6
feet within 20 nm/near shore and 5 to 7 feet beyond 20
nm/offshore, then beginning to decrease after midnight and into
the early morning hours of Tuesday.

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