North Charleston, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

766
FXUS62 KCHS 032318
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
618 PM EST Tue Mar 3 2026

.WHAT HAS CHANGED...
All sections updated.

&&

.KEY MESSAGES...
- 1) Areas of fog expected across portions of southeast Georgia
  and the South Carolina Lowcountry and adjacent waters tonight
  into Wednesday morning.

- 2) Unseasonably warm temperatures are expected through the
  weekend.

&&

.DISCUSSION...
KEY MESSAGE 1: Areas of fog expected across portions of southeast
Georgia and the South Carolina Lowcountry and adjacent waters
tonight into Wednesday morning.

Satellite imagery shows that an area of dense fog is already
ongoing across the GA coastal waters and likely starting to push
onshore along the McIntosh County coast. Current thinking is
that dense fog across the coastal waters will gradually expand
inland along the coast later this evening and then spread across
the entire area through the night. Dense fog looks likely, and a
Dense Fog Advisory will probably eventually be needed for most
or all of the area. Fog will stick around through at least mid
morning on Wednesday and likely not completely improve until
late morning or midday.

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

The mid-levels will consist of broad ridging over the Gulf
coast states Wednesday morning. It`ll shift over the Southeast
U.S. Wednesday afternoon, then offshore on Thursday, where it`ll
prevail through Saturday. The ridge is then expected to shift
further offshore early next week, causing heights to lower over
our region. At the surface, High pressure will prevail in the
western Atlantic Wednesday through the weekend. This will usher
some moisture into our region. Wednesday and Thursday should be
dry, while POPs are slight chance across our far inland counties
Friday afternoon and Saturday afternoon. POPs appear to trend a
bit higher Sunday afternoon and Monday afternoon. But no severe
thunderstorms are expected.

What will be noticeable is the unseasonably warm temperatures.
High temperatures Wednesday will range 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 should be a tad higher, from the upper 70s
to near 80 degrees across our SC counties to around 80 degrees
to the lower 80s across our GA counties, except cooler at/near
all of our beaches. Temperatures remain well above normal Friday
through early next week. Highs will range in the upper 70s to
middle 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. Despite these temperatures, no records
are currently forecasted to be tied or broken.

&&

.AVIATION /00Z WEDNESDAY THROUGH SUNDAY/...
The 00z TAF period begins with VFR conditions at KCHS, KJZI, and
KSAV. The primary forecast challenge will be dense fog and very
low ceilings expected to begin developing later this evening.
Current thinking is that marine dense fog and low stratus will
gradually spread inland later this evening and through the
overnight. Widespread IFR conditions, with dense fog, are
anticipated and reflected in the TAF`s. Full improvement back to
VFR likely won`t occur late morning or midday on Wednesday.

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

&&

.MARINE...
Early evening update: Satellite imagery shows a large area of
dense fog and low stratus across both the nearshore and outer GA
waters. Therefore, we have issued a Dense Fog Advisory that runs
through noon Wednesday.

High pressure across the region will result in calm winds
overnight. Moisture below a persistent llvl inversion should
result in low stratus to develop this evening, spreading from
the coast. Dewpoints across the marine zones in the mid to upper
50s across shelf waters in the low to mid 50s will favor sea
fog formation. Recent runs of the HRRR indicate that sfc
condensation pressure deficits fall to around 0 mb late tonight
into daybreak Wednesday. HREF shows the probability of less than
0.5 mile visibility across the region remains around 50 percent
along the coast to 40 percent inland. Dense Fog Advisories may
needed for the marine zones tonight into Wednesday morning.

High pressure 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
Saturday. Winds should veer to the south/southwest early next
week, which would increase the potential for sea fog. Otherwise,
winds and seas will stay below Small Craft Advisory levels.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...Dense Fog Advisory until noon EST Wednesday for AMZ354-374.

&&

$$

BSH