North Charleston, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

520
FXUS62 KCHS 212331
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
731 PM EDT Sat Mar 21 2026

.WHAT HAS CHANGED...
The Aviation Section has been updated for the 00Z TAF issuance.

&&

.KEY MESSAGES...
- 1) Quiet weather and warming temperatures into Monday.

- 2) A strong backdoor cold front will yield breezy winds and
  cooler conditions mid-week.

&&

.DISCUSSION...
KEY MESSAGE 1: Quiet weather and warming temperatures through
the weekend.

Surface high pressure will remain the dominant synoptic feature
while aloft, a weak shortwave ripples across the southeastern
states. CAMs remain in agreement that this shortwave could trigger
some showers and maybe a thunderstorm, mainly across the SC
Midlands. The current forecast for the SC Lowcountry and SE Georgia
remains dry, however a stray weak shower could impact far inland
Berkeley County this evening. High temperatures will be roughly 10
degrees above normal through the weekend and into Monday, with highs
reaching into the 80s.


KEY MESSAGE 2: A strong backdoor cold front will yield breezy winds
and cooler conditions mid-week.

A strong backdoor cold front will push through the region Monday
night/Tuesday morning. In the wake of the front, breezy conditions
will develop, especially along the coastal counties. The NBM has
increased in its probabilities of wind gusts >25 mph along the
coastal counties, now showing around 60% on Tuesday. While high
temperatures Tuesday will be much lower than the previous few days,
highs will generally be around normal for this time of year in the
upper 60s to low 70s. Meaningful rainfall with this backdoor cold
front is not expected, with PoPs topping out only around 30% Tuesday
night and Wednesday. A return to above normal temperatures arrives
Thursday as high pressure builds into the region again.

&&

.AVIATION /00Z SUNDAY THROUGH THURSDAY/...
VFR conditions will prevail at CHS/JZI/SAV terminals through
00Z Monday. However, west winds should turn southwest/south and
gust to around 20 kt Sunday afternoon at all terminals.

Extended Aviation Outlook: Prevailing VFR through Monday. A backdoor
cold front will push through the terminals Monday evening into
Tuesday morning bringing showers and thunderstorms. In the wake of
the front on Tuesday, winds will shift to the NE and gust 20 to 25
knots.

&&

.MARINE...
Prevailing high pressure this weekend and into Monday will yield sub-
Small Craft Advisory conditions across all waters.

Monday evening a backdoor cold front is poised to push southward
across the marine zones. The combination of cooler temperatures and
a tightening pressure gradient will yield gusty NE winds and
building seas Monday night into Wednesday morning. Wind gusts could
reach Gale criteria across waters outside of the Charleston Harbor
early Tuesday morning. A Gale Watch could be required for these
waters. Small Craft Advisory conditions are forecast in the
Charleston Harbor, with NE gusts of 25 knots.

High pressure will build into the region mid-week, with decreasing
winds and diminishing wave heights. 6 ft seas may linger in the 20
to 60 nm offshore GA waters into Wednesday.

&&

.CLIMATE...
Record High Temperatures:

March 22:
KCHS: 88/2011

March 23:
KCHS: 87/1995

March 27:
KCHS: 87/2021
KCXM: 81/2021
KSAV: 89/2021

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...None.

&&

$$

CPM/DPB