North Charleston, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

408
FXUS62 KCHS 121948
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
248 PM EST Thu Nov 12 2026

.WHAT HAS CHANGED...
A Lake Wind Advisory has been issued for Lake Moultrie in
Berkeley County.

&&

.KEY MESSAGES...
- 1) Warm and breezy today ahead of an afternoon/early evening
  cold front.

- 2) Frost/freeze conditions are possible Friday night through
  Sunday night.

&&

.DISCUSSION...
KEY MESSAGE 1: Warm and breezy today ahead of an afternoon/early evening
cold front.

Breezy westerly winds will continue as a cold front pushes off the
coast later this afternoon. Gusts 25-30 mph will be common through
the late afternoon while surface temps warm into the mid-upper 70s
one last day this week. Strong cold air advection will occur in the
wake of the front overnight with a west-northwest flow bringing
noticeably cooler air into the local area. This could maintain gusty
conditions into the mid evening hours, but a notable decrease in low-
lvl wind fields is expected through the night post fropa.

Lake Winds: Breezy west-southwesterly winds across Lake
Moultrie will peak around 25-30 kt through late afternoon. Low-
lvl wind fields will support favorable mixing with the passage
of the cold front, trending weaker by sunset. A brief Lake Wind
Advisory has been issued for Lake Moultrie until this evening.


KEY MESSAGE 2: Frost/freeze conditions are possible Friday night
through Sunday night.

A dry cold front will sweep across the region today. Following the
cold front, steady H85 CAA is forecast to occur until 12Z Saturday,
with values between -1 to -2C. Using a blend of guidance, low
temperatures Saturday morning are forecast to range from the mid 30s
inland to the low to mid 40s across the coastal counties. Northwest
winds Friday night into Saturday morning should range between 5 to 8
mph with RH below 95 percent. Given marginal temperatures, winds,
and RH frost may only form in sheltered locations or rooftops across
inland counties Saturday morning. The forecast will mention areas to
patchy frost in the most favorable locations.

Chilly llvl thicknesses will remain on Saturday, with highs ranging
around 60 degrees. The center of 1030 mb high over the Mid West will
ridge SE across GA and SC Saturday night into Sunday morning. The
weakening pressure gradient should yield light to calm winds through
much of Saturday night. Given a clear sky, light to calm winds, and
deep dry air, radiational cooling conditions should provide the
lowest temperatures so far this season. Favoring values near the
10th percentile of the guidance, low temperatures are forecast to
fall below freezing inland, generally west of I-95. Frost supporting
temperatures are possible into portions of the coastal counties. A
Freeze Watch may be needed for a portion of the inland forecast
area. If temperature exceed the currently forecasted values, then
the low temperatures on Sunday morning could end the growing season
for the region. The forecast will indicate widespread to areas of
frost Sunday morning.

The cool air mass will linger into early next week. Frost supporting
temperature are possible inland again Monday morning. By Tuesday
into Wednesday morning, temperatures should remain in the upper 30s
for the coolest locations.

&&

.AVIATION /19Z THURSDAY THROUGH TUESDAY/...
Gusty westerly winds will persist through the afternoon and then
dwindle late afternoon while becoming west-northwest at
KCHS/KJZI/KSAV. Clear skies will result in VFR conditions at all
terminals through 18Z Friday.

Extended Aviation Outlook: VFR.

&&

.MARINE...
Tonight: Gusty west-southwest winds between 25-30 kt will
continue across the local waters due to a pinched pressure
gradient as a cold front pushes offshore this evening. A Small
Craft Advisory has been issued for the Charleston Harbor, in
addition to the current ongoing SCAs, for a brief period of 25
kt gusts through this evening. Seas will continue to build and
peak around 4-6 ft this evening, largest across the Charleston
County waters (0-20 nm) and offshore Georgia waters (20-60 nm).
A notable decrease in low-lvl wind fields will support improving
conditions by daybreak Friday, when Small Craft Advisories are
set to drop off.

Friday through Monday: Surges of winds are possible across the
waters Friday into Saturday, associated with periods of CAA. The
combination of a tightening pressure gradient and CAA may push wind
gusts high enough for Small Craft Advisory criteria across the outer
GA waters Friday night into Saturday. Otherwise, high pressure will
continue to build into the region through the weekend into early
next week with wind/sea conditions remaining well below Small Craft
Advisory level thresholds.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...Lake Wind Advisory until 8 PM EST this evening for SCZ045.
MARINE...Small Craft Advisory until 8 PM EST this evening for AMZ340.
     Small Craft Advisory until 3 AM EST Friday for AMZ360-362-364.
     Small Craft Advisory until 7 AM EST Friday for AMZ384.

&&

$$

BRS/NED