North Charleston, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

681
FXUS62 KCHS 260027
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
827 PM EDT Tue Aug 25 2026

.WHAT HAS CHANGED...
KEY MESSAGE 1 has been updated for latest trends. The Aviation
Section has been updated for the 00Z TAF issuance.

&&

.KEY MESSAGES...
- 1) Isolated strong thunderstorm possible early evening.

- 2) Unsettled weather is expected from Wednesday into the
weekend, with daily chances for showers and thunderstorms and the
potential for locally heavy rainfall.

&&

.DISCUSSION...
KEY MESSAGE 1: Isolated strong thunderstorm possible early
evening.

Deep moisture remains while a stationary front is draped over
the Southeast. Best chances for storms continue to be across
inland Georgia during early evening hours, where boundary
collisions and cell mergers occur. An isolated strong thunderstorm
remains possible with damaging wind gusts. However, this concern
will continue to lower with the loss of diurnal heating. PWATS
remain high (1.7 to 2.0 inches) across inland Georgia, and could
continue to support minor flooding concerns through early evening,
before convection wanes by mid-late evening.

KEY MESSAGE 2: Unsettled weather is expected from Wednesday into the
weekend, with daily chances for showers and thunderstorms and the
potential for locally heavy rainfall.

An upper-level trough will remain positioned across the Ohio River
Valley with a series of shortwaves moving through the region through
the end of the week. At the surface, a stationary front will linger
across the Southeast before a cold front approaches this weekend.
This pattern will provide repeated sources of lift, while abundant
atmospheric moisture, with PWAT values near or slightly above 2
inches, well above normal for late August, will support efficient
rainfall production. As a result, showers and thunderstorms will be
possible each day, with most guidance suggesting convection will be
scattered to numerous in coverage. However, confidence in the exact
location and timing of storms remains relatively low.

An isolated storm could become strong to severe, with damaging wind
gusts possible. The primary concern, however, will be locally heavy
rainfall. The stationary front draped over the area could result in
slow-moving storms or repeatedly track over the same areas. These
processes can produce locally high rainfall totals in a short period
of time, increasing the potential for localized flooding or flash
flooding, particularly in urban and low-lying areas.

&&

.AVIATION /00Z WEDNESDAY THROUGH SUNDAY/...
VFR conditions should prevail at CHS/JZI/SAV through at least
16Z Wednesday, although TEMPO MVFR cigs are possible at JZI
between 00-02Z this evening. PROB30 groups have been introduced
at all terminals Wednesday afternoon for thunderstorm and MVFR
potential, between 17-21Z at JZI, and 18-23Z at CHS/SAV.

Extended Aviation Outlook: Daily chances for showers and
thunderstorms will continue through the weekend, with storms
potentially producing temporary flight restrictions, reduced
visibility, gusty winds, and brief periods of heavier rainfall each
afternoon.

&&

.MARINE...
Through Tonight: Easterly winds will shift southerly later this
evening. Wave heights are forecast to remain between 2 to 3 ft.

Wednesday through Sunday: South/southwesterly winds will continue
through the period, with winds averaging 15 knots or less. Small
Craft Advisories are not expected during the period at this time.
However, any showers or thunderstorms that develop over or move
across the waters could produce locally strong wind gusts, frequent
lightning, and/or briefly higher seas.

&&

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

&&

$$