Charleston, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

817
FXUS62 KCHS 030522
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
122 AM EDT Thu Apr 3 2025

.SYNOPSIS...
Strong Atlantic high pressure will prevail into this weekend,
then a cold front will move through Monday. High pressure will
then rebuild.

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...
Overnight: Here it is early April during the overnight hours,
and many temperatures and dew points are still above 70F. This
is the result of a southerly synoptic flow and partly to mostly
cloudy skies. Since winds never fully decouple, we`ll be lucky
to get lows down into the upper 60s, or about 15F above climo.
Low stratus will be widespread with considerable moisture
trapped beneath a 2-3C inversion. Given that 925 mb winds are
20-30 kt, these clouds will not build down low enough to create
more than some patchy fog concerns. The most likely occurrences
of such will be where rainfall occurred Wednesday.

&&

.SHORT TERM /6 AM THIS MORNING THROUGH SATURDAY/...
Deep layered ridging over the Eastern United States and western
Atlantic will maintain dry weather and above normal
temperatures. A prevailing southerly flow will help enhance the
afternoon sea breeze each day, so locations closer to the coast
will remain considerably cooler than places farther inland.
Highs inland will reach the mid to upper 80s each day, with a
few readings in the lower 90s possible closer to the Central
Savannah River Area (CSRA).

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
Ridging will continue through Sunday, then a longwave trough
will sweep east Monday, pushing a strong cold front through the
area. Fairly widespread showers and thunderstorms expected
Monday, then temps cool down considerably for Tuesday and
Wednesday.

&&

.AVIATION /06Z THURSDAY THROUGH MONDAY/...
KCHS/KJZI/KSAV: Low stratus will continue to develop and expand
in coverage, leading to the development of flight restrictions
at all terminals into this morning. We show MVFR at KCHS and
KJZI, but IFR at KSAV where we begin at that category with the
latest TAF set, while the HREF shows higher probabilities of
such than at the other airfields. A return to VFR isn`t
expected until 16-17Z when mixing heights finally climb enough.
S winds into this morning never drop below about 8-10 kt, and
then during the heating of the day gusts of around 20 kt or so
occurs during the late morning and afternoon, before gusts
diminish by sunset. Flight restrictions will return tonight, but
that will be addressed in future TAFs.

Extended Aviation Outlook: Nighttime ceiling restrictions
possible Thursday night.

&&

.MARINE...
Overnight: High pressure across Bermuda will continue to
dominate with increasing south to southeasterly flow across the
coastal waters. Winds of 10 to 15 knots will be common with some
higher gusts, while seas build into the 3 to 5 foot range.

Fairly quiet marine conditions expected Thursday through
Saturday. Southerly flow will strengthen Saturday into Sunday as
an upper trough approaches from the west. 6 ft seas could
encroach on the outer portions of the offshore GA and nearshore
SC waters. Sunday and Sunday night we could see 25 kt wind gusts
in the Charleston nearshore waters and Charleston Harbor, so
Small Craft Advisories cannot be ruled out.

&&

.CLIMATE...
Record High Temperatures:

April 5:
KSAV: 90/1988

April 6:
KSAV: 90/1967


Record High Minimum Temperatures:

April 3:
KCHS: 67/2012
KCXM: 68/2012
KSAV: 68/2012

April 4:
KCHS: 70/1974
KCXM: 69/1974
KSAV: 69/1974

April 5:
KCHS: 65/2017
KCXM: 67/2023
KSAV: 66/1957

April 6:
KCHS: 68/2023 KSAV: 68/2023

&&

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

&&

$$

NEAR TERM...
SHORT TERM...JRL
LONG TERM...JRL
AVIATION...
MARINE...