North Charleston, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

647
FXUS62 KCHS 150228
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
1028 PM EDT Tue Jul 14 2026

.WHAT HAS CHANGED...
Update key message 1.

&&

.KEY MESSAGES...
- 1) Minor to moderate coastal flooding possible during the
  Wednesday evening high tide cycle along the South Carolina
  and Georgia coast.

- 2) Hot and humid conditions are expected to return to the
  area late this week through early next week. Heat Advisories
  could be needed.

&&

.DISCUSSION...
KEY MESSAGE 1: Minor to moderate coastal flooding possible during the
Wednesday evening high tide cycle along the South Carolina and
Georgia coast.

High astronomical tides associated with Monday`s lunar perigee and
today`s New Moon will continue, with a 6.46 ft MLLW Wednesday
evening in the Charleston Harbor. Peak water levels of 7.4-7.6
ft MLLW are forecast for Wednesday evening`s high tide. At Fort
Pulaski the high tide is forecast to peak near 9.5 ft MLLW
(Minor Flooding). Another Coastal Flood Advisory is expected
Wednesday evening as well. If heavy rainfall were to occur near
or during the time of the evening high tide cycle, flooding
concerns would increase as total water levels would similarly
increase.

In the absence of strong tidal departures on Thursday, coastal flood
issues are not anticipated.

KEY MESSAGE 2: Hot and humid conditions are expected to return
to the area late this week through early next week. Heat
Advisories could be needed.

Mid and upper level ridging is expected to build back across the
Southeast later this week and persist through the weekend.
Widespread low to mid 90s return to the forecast starting Thursday
and extend through the weekend and into early next week. The low-
level flow pattern around the subtropical high will help to drive
elevated dewpoints across the region as well. This combination of
highs in the low to mid 90s and dewpoints in the mid to upper 70s
will yield elevated heat indices each day, especially along the
coastal corridor. Heat index values of 105-110 degrees will be
possible along the coast each day, and Heat Advisories could be
needed.

&&

.AVIATION /02Z WEDNESDAY THROUGH SUNDAY/...
0Z TAFs: A shower or two may pass by the terminals through mid-
evening. Forecast soundings and MOS indicate that some
restrictive ceilings may develop during the pre-dawn hours, TAFs
will indicate MVFR ceilings at this time. Conditions should
return to VFR once mixing begins by 14Z Weds morning. Given a
coastal low nearby, warm and humid conditions, thunderstorms are
possible Wed afternoon and evening along a sea breeze. The TAFs
will feature PROB30 at KCHS and KJZI between 18-21Z and a TEMPO
from 18-21Z.

Extended Aviation Outlook: Shower and thunderstorm coverage is
expected to diminish across the region beginning Wednesday evening.
Low chances of thunderstorm impacts are expected through the
weekend.

&&

.MARINE...
Tonight through Sunday: Quiet conditions with relatively light flow
and seas around 2 feet will prevail across the local waters through
Wednesday night as a weak boundary sits in the vicinity. By
Thursday, this boundary will wash out and the subtropical high to
the east will increasingly take control. This change will bring
southwest flow to the region, turning more southerly each afternoon
and evening with the sea breeze. Winds will be stronger during this
time, with 10-15 knots and gusts up to 20 knots along the land/sea
interface. Over the weekend, the gradient is expected to strengthen
between an inland trough and the high to the east. This will produce
stronger southwest to south flow, with speeds getting more into the
15-20 knot range and an increasing chance of gusts up to 25 knots,
mainly for the SC coast and Charleston Harbor. We could even need
some short duration Small Craft Advisories over the weekend.

&&

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

&&

$$