947
FXUS62 KCHS 142208
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
608 PM EDT Tue Oct 14 2025

.SYNOPSIS...
High pressure will extend into the region this week. A dry cold
front will drop south through the area Wednesday night. Another
cold front could impact the area late in the weekend.

&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
With good radiational cooling in place, lows will drop into the
upper 50s inland, and low 60s along the coastline. Light north-
northwesterly winds are unlikely to change overnight, and will
not be able to fully decouple. Therefore, opted out of
referencing fog in the forecast at this time. However, a small
chance of patchy fog developing over sheltered areas is not
completely out of the question for tonight.

&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY NIGHT/...
No notable weather concerns anticipated for the next several days.
The forecast area will largely be under very dry northwest flow
aloft, positioned between a strong mid level ridge over the Lower
Mississippi River Valley and a low passing over and off the
Northeast coast Wednesday into Thursday. The ridge will shift
eastward over the region on Friday. High pressure will be the
dominant surface feature as it builds from the Great Lakes into
Eastern Canada Wednesday and Thursday. This will force a backdoor
cold front down the eastern seaboard, crossing the Lowcountry and SE
GA Wednesday night into Thursday night, with little sensible weather
impact beyond lowering humidity and increasingly breezy winds along
the coast Thursday. The surface ridge builds overhead by Friday,
bringing continued quiet weather.

Temperatures right around normal on Wednesday will trend on the
cooler side following fropa for Thursday and Friday. Lows Thursday
night will be chillier than we`ve seen in awhile, with several
inland locations expected to dip into the mid to upper 40s.

&&

.LONG TERM /SATURDAY THROUGH TUESDAY/...
Surface high pressure will drift overhead early in the weekend, then
eventually offshore in advance of an approaching cold front. Some
timing differences exist, but fropa looks to occur later Sunday or
Sunday night. This front will bring rain chances back into the
forecast, though limited available moisture will keep chances and
QPF only the low end. High pressure should return thereafter for the
early part of next week.

&&

.AVIATION /22Z TUESDAY THROUGH SUNDAY/...
15/00z TAF Discussion:
KCHS/KJZI/KSAV: VFR will prevail through 16/00z.

Extended Aviation Outlook: Predominantly VFR conditions expected.

&&

.MARINE...
Tonight: As high pressure continues to build down from the
northwest, north-northwesterly winds will prevail at 10 to 15 kts,
with gusts up to 20 kts through the rest of the evening. Overnight,
winds will veer northerly at 10 to 15 kts with gusts up to 22-23 kts
across the nearshore waters and 24-26 kts across the Georgia
offshore waters. As east-north-easterly swell works itself into
the local waters, seas will build 2 to 4 ft across the
nearshore waters, and 5 to 7 ft across the outer Georgia waters.
A Small Craft Advisory for the Georgia offshore waters remains
in effect from midnight tonight until Friday night for elevated
seas and winds.

Wednesday through Sunday: North-northeast winds will subside some on
Wednesday, before a dry cold front passes through Wednesday night
and winds pick back up to the 15-20 kt range for Thursday.
Conditions should largely stay below Small Craft Advisory criteria,
with the exception being the waters beyond about 30 nm offshore
where 5-7 foot seas are forecast. A Small Craft Advisory will remain
in effect there into Friday. High pressure is expected to shift
overhead and eventually offshore late week into the weekend, with no
additional marine concerns. Another cold front could approach the
area on Sunday bringing a risk for increasing winds/seas.

&&

.TIDES/COASTAL FLOODING...
There is a threat for minor coastal flooding with the late
afternoon high tide cycles Wednesday and Thursday along the
Charleston and Colleton county coasts, as gusty northeast winds
are expected to drive up tidal departures. Current forecast
keeps tide levels on the lower end of minor flooding thresholds.
The risk should be lower late week into the weekend as high
pressure shifts overhead and eventually offshore, and the wind
direction becomes less favorable.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...Small Craft Advisory from midnight tonight to 9 PM EDT Friday
     for AMZ374.

&&

$$