North Charleston, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

320
FXUS62 KCHS 022314
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
614 PM EST Mon Mar 2 2026

.WHAT HAS CHANGED...
Key Message 1 and the marine section was updated.

&&

.KEY MESSAGES...
- 1) Areas of fog expected across portions of coastal southeast
  Georgia tonight.

- 2) Unseasonably warm temperatures are expected Tuesday into
  the weekend.

&&

.DISCUSSION...
KEY MESSAGE 1: Areas of fog expected across portions of coastal
southeast Georgia tonight.

Webcams out of Tybee, Sapelo Island and Saint Simons show
extensive sea fog has redeveloped along the Georgia coast. Near
term guidance has an okay handle on the situation and gradually
expands it west into the Georgia coastal zones overnight. While
there may be somewhat of an improvement over the next few hours
over Tybee Island and coastal Chatham, fog is expected to expand
back into those areas overnight. As noted below, A Dense Fog
Advisory may become necessary for parts of the Georgia coast

A backdoor cold front pushed across most of the forecast area
today. Recent visible satellite images show a surge of low
clouds and fog pushing SW across the Georgia waters. The flow
across the nearshore waters will remain from the northeast
tonight, supported by the pressure gradient between an inland
ridge and trough over the Gulf Stream. Given the steady
northeast wind, moisture should stream over the coastal areas of
SE Georgia through tonight. Forecast soundings over SE GA show
a strong H9 inversion today, remaining overnight. Moisture will
remain below the inversion, building down late tonight. The
forecast will indicate that areas of fog will develop this
evening over the coastal counties from McIntosh to Chatham
Counties. The fog may spread gradually inland through the
overnight hours. HREF probabilities of less than a half mile
increase to 60 percent over the area by 6 AM. It is possible
that a Dense Fog Advisory could be needed for coastal GA and the
adjacent waters tonight.


KEY MESSAGE 2: Unseasonably warm temperatures are expected
Tuesday into the weekend.

The mid-levels will consist of weak zonal flow overhead on
Tuesday. Broad ridging will build over the Gulf coast states
Tuesday night, then shift over the Southeast U.S. Wednesday. The
ridge will shift offshore on Thursday, then prevail in that
location through the weekend. At the surface, the wedge of High
pressure to our north will gradually erode on Tuesday. High
pressure will then prevail in the western Atlantic Wednesday
through the weekend. This pattern will promote a drastic warming
trend and unseasonably warm temperatures. High temperatures
Tuesday will range from near 70 degrees across most of our SC
counties, to the lower 70s across our GA counties, with all of
our beaches being cooler. Temperatures rise a few degrees on
Wednesday, ranging from the mid to upper 70s across our SC
counties to the upper 70s to lower 80s across our GA counties,
except cooler at/near all of our beaches. High temperatures
Thursday into the weekend will remain well above normal. They`ll
be in the upper 70s to lower 80s across our SC counties and the
lower to middle 80s across our GA counties. Though, it`ll be
cooler at/near the beaches. Low temperatures during this time
period will be in the upper 50s to lower 60s.

Models have trended drier for the end of this week into the
weekend. POPs are now slight chance across our far inland
counties Friday and Saturday afternoon. POPs trend higher
everywhere on Sunday.

&&

.AVIATION /00Z TUESDAY THROUGH SATURDAY/...
03/00z TAF Discussion:
KCHS/KJZI/KSAV: VFR cigs are poised to quickly give way to MVFR
and eventually IFR cigs at all terminals overnight. IFR looks to
reach KSAV as early as sunset, possibly an hour or two after and
around 05z at KCHS and KJZI. Fog is not expected to be much of
an issue with cigs expected to bottom out around or just below
alternate minimums. VFR will return by late morning at all three
sites.

Extended Aviation Outlook: Restrictive ceilings are possible
overnight into the early morning hours each night through late
week due to low stratus/fog.

&&

.MARINE...
Winds will slowly diminish across the waters tonight. The Small
Craft Advisories have been cancelled for the Georgia legs, but
continues until 1 AM for the South Carolina legs. Webcams show
extensive sea fog has developed along the Georgia coast. A
Marine Dense Fog Advisory has been issued until 8 AM Tuesday for
the Savannah-Altamaha Sound nearshore leg.

High pressure builds over the region on Tuesday and will
prevail in the western Atlantic midweek through the weekend.
This will cause surface winds to shift to the east by Wednesday,
then the southeast Wednesday night into the weekend. Winds and
seas will stay below Small Craft Advisory levels.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...Small Craft Advisory until 1 AM EST Tuesday for AMZ350-352.
     Dense Fog Advisory until 8 AM EST Tuesday for AMZ354.

&&

$$