North Charleston, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

953
FXUS62 KCHS 230611
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
211 AM EDT Mon Mar 23 2026

.WHAT HAS CHANGED...
The Aviation Section has been updated for the 06Z TAF issuance.
All Key Messages and sections have been updated.

&&

.KEY MESSAGES...
- 1) A strong backdoor cold front will move through this evening,
resulting in breezy winds and cooler conditions Tuesday.

- 2) High pressure briefly returns late this week, followed by
  another cold front Friday night into Saturday.

&&

.DISCUSSION...
KEY MESSAGE 1: A strong backdoor cold front will move through this
evening, resulting in breezy winds and cooler conditions Tuesday.

As noted in days past, will see a strong backdoor cold front push
across the region late this evening. A line of showers and
thunderstorms may develop ahead of this boundary, with coverage
forecast to remain limited given the lack of moisture in place.
While severe weather is not anticipated at this time, may still see
some isolated heavy downpours, lightning, and gusts up to 40 to 50
MPH.

The more notable impacts of this front look to occur Tuesday, as
breezy northeasterly winds and cooler temperatures prevail. Most
places are likely to see gusts up to 25 MPH, with areas along the
immediate coast having a 50-60% chance of seeing gusts in excess of
30 MPH. In regard to temperatures, expect afternoon highs in the mid
to upper 80s Monday to fall back in the mid to upper 60s Tuesday and
Wednesday.

KEY MESSAGE 2: High pressure briefly returns late this week,
followed by another cold front Friday night into Saturday.

Sfc high pressure builds across the region Thursday, allowing
temperatures to moderate back above seasonal norms. Currently have
highs in the 70s to lower 80s Thursday rising into the mid to upper
80s by Friday. May even see a few locations across interior
southeast Georgia take a shot a 90 degrees. Otherwise, expect yet
another cold front to take aim at the region heading into the
weekend. While cooler temperatures look likely, model certainty
remains low concerning the possibility of any showers or storms with
FROPA. Certainly something to keep an eye on in the coming days
ahead of Easter.

&&

.AVIATION /06Z MONDAY THROUGH FRIDAY/...
VFR conditions are expected at CHS/JZI/SAV terminals through 06Z
Tuesday. Prior to the 6Z TAFs, KCLX VAD wind profile indicated that
winds at 2 kft were 40 kts. The KCHS and KJZI TAFs will feature a
mention of LLWS until 14z. Winds will remain from the WSW this
afternoon as a cold front approaches from the north. Forecast
soundings and MOS indicates that each terminals will see gusts
around 20 kts develop around 14Z and continue until 21Z. A band of
scattered showers and thunderstorms will accompany the front across
KCHS and KJZI from 23Z to 3Z, highlighted with TEMPOs. The
convection of coverage may decrease before reaching KSAV by 3Z. In
the wake of the front, winds will shift from the north with gusts
between 20 to 25 kts.

Extended Aviation Outlook: On Tuesday, winds will shift from the NE
and gust 20 to 25 knots.

&&

.MARINE...
Today: The pressure pattern ahead of the approaching cold front
should support support southwest winds between 10 to 15 kts with
gusts around 20 kts. Wave heights should range between 3-5 ft.

This evening, guidance remain consistent with the overall timing and
placement of a backdoor cold front push across the marine zones by
0Z. In the wake the front, the pressure gradient is forecast to
increase to 4-5 mbs tonight into midday Tuesday. Winds across the
Atlantic waters, outside the Charleston Harbor, are forecast to turn
from the NE and strengthen to around gales around midnight tonight.
Gale gusts are possible through the daylight hours Tuesday. The Gale
Watch for the SC and GA Atlantic waters has been upgraded to a Gale
Warning. In addition, wave heights are forecast to peak on Tuesday,
ranging from 6-9 ft within 20 NM and 9-11 ft between 20-60 NM. Small
Craft Advisory has been issued for the Charleston Harbor, with NE
gusts around 30 knots.

On Wednesday, a building sfc ridge should result in decreasing winds
across the coastal waters. As a result, wave heights should
gradually subsided, however, 6 ft seas may linger over the outer GA
waters through Wednesday. Conditions on Thursday and Friday should
feature winds between 10 to 15 kts and seas between 2 to 3 ft.

&&

.CLIMATE...
Record High Temperatures:

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...Small Craft Advisory from 2 AM to 8 PM EDT Tuesday for AMZ330.
     Gale Warning from 11 PM this evening to 11 PM EDT Tuesday for
     AMZ350-352.
     Gale Warning from 2 AM to 11 PM EDT Tuesday for AMZ354.
     Gale Warning from 11 PM this evening to 2 AM EDT Wednesday for
     AMZ374.

&&

$$

NED/SST