Edisto Island, South Carolina Weather Forecast Discussion

293
FXUS62 KCHS 192335
AFDCHS
Area Forecast Discussion
National Weather Service Charleston SC
735 PM EDT Fri Sep 19 2025
.SYNOPSIS...
High pressure will prevail through the middle of next week,
then a cold front may approach the area.
&&
.NEAR TERM /THROUGH SATURDAY/...
Isolated showers and thunderstorms across SE GA and SC should
dissipate by 9 PM. The rest of the night should feature light to
calm winds and thin cloud cover. Dewpoints in the wake of a sea
breeze has resulted in dewpoints rising to around 70 across
most of the forecast area. As temperatures cool late tonight,
dewpoint depressions should narrow to 1 to 3 degrees. Patchy fog
should develop during the pre-dawn hours, dissipating during
the first hour or two of daylight Saturday morning.
&&
.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
Dry high pressure will remain centered north of the region
through Monday. A weak coastal trough will develop along the GA
coast on Monday, with the potential for enough moisture and
forcing to support a few showers or thunderstorms in coastal
southeast GA during the afternoon. Highs each day will be
relatively warm in the mid to upper 80s, except low 90s across
far inland areas.
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
An upper trough will gradually approach the area from the west
during the middle of next week, with a low pressure system
possibly moving into the Southeast mid to late week. A cold
front could move into the area Thursday or Friday, bringing the
next significant chance for rain.
&&
.AVIATION /00Z SATURDAY THROUGH WEDNESDAY/...
0Z TAFs: The rest of the night should feature light to
calm winds and thin cloud cover. Dewpoints in the wake of a sea
breeze has resulted in dewpoints rising to around 70 across the
terminals. As temperatures cool late tonight, dewpoint
depressions should narrow to 1 to 3 degrees. Patchy fog should
develop during the pre-dawn hours, dissipating during the first
hour or two of daylight Saturday morning. Each TAF will feature
TEMPOs from 9-12Z for MVFR fog. A weak sea breeze is timed to
push across the terminals by 19Z Sat, winds shifting from the SE
around 10 kts.
Extended Aviation Forecast: VFR through Sunday. MVFR ceilings
possible around daybreak Monday through Wednesday.
&&
.MARINE...
Through Tonight: The local sea breeze influences along the
land/sea interface and across the Charleston Harbor will
persist until sunset, then dissipate. Then, onshore winds in the
evening are expected to shift to the NE overnight, remaining in
the sustained 5-10 kt range. Seas will average 2-3 ft.
Saturday through Tuesday: Expect an increasing northeast
gradient Saturday and Sunday as a wedge of high pressure builds
inland and a trough of low pressure forms over the eastern
Atlantic waters. Conditions are expected to remain just below
advisory levels, with winds generally 15-20 knots, with some
gusts near 25 knots possible. Seas generally 3 to 5 feet.
Monday and Tuesday, winds weaken and eventually turn SE.
Rip Currents: Increasing risk for rip currents expected into
this weekend as gusty northeast winds develop between strong
high pressure inland, and coastal troughing offshore. Increasing
swell from the southeast will also favor a Moderate Risk of rip
currents along Georgia beaches by Saturday. Moderate risk
forecast for all beaches on Sunday.
&&
.TIDES/COASTAL FLOODING...
Strong northeasterly winds are expected to create larger tidal
departures this weekend, which could result in tide levels
approaching 7 ft MLLW (minor) in Charleston Harbor starting
with the Saturday evening high tide cycle. The risk for minor
coastal flooding should continue into early next week. Coastal
Flood Advisories could eventually be needed for minor saltwater
flooding in Charleston and Coastal Colleton Counties.
&&
.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...None.
&&
$$
NEAR TERM...NED
SHORT TERM...JRL
LONG TERM...JRL
AVIATION...NED
MARINE...JRL

NWS CHS Office Area Forecast Discussion