North Charleston, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

808
FXUS62 KCHS 250210
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
910 PM EST Wed Dec 24 2025

.SYNOPSIS...
High pressure will prevail through the remainder of the holiday
week. A cold front will move through the area early next week.

&&

.NEAR TERM /THROUGH THURSDAY/...
Tonight, the mid and upper level ridge remains west of the
area, with a surface ridge centered from the eastern mid
Atlantic states, southwest to interior SC and GA. This will
allow very light to calm winds most areas after sunset. High
clouds late evening and overnight should push south before
daybreak, leaving a few hour window with favorable radiational
cooling where some patchy fog could develop, especially along
and west of I-95 where there will be greater low level moisture
content.

&&

.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/...
Christmas through Saturday, short term guidance indicates that a
strong H5 ridge will remain centered over the Gulf, with the ridge
axis extending between the central CONUS and Appalachians. During
the period, a clipper system will track east across the Ohio River
Valley and Mid-Atlantic states. This pattern will keep the forecast
area under dry NW flow aloft. At the sfc, high pressure should
remain centered over the northern Gulf coast. Overall, the forecast
will feature dry and very mild conditions through the short term
period. Temperature should trend warmer through the rest of the
week. Saturday is forecast to see the warmest values, featuring lows
in the mid 50s and highs in the mid to upper 70s. In fact,
temperatures may range within 3 degrees of record high temperatures
for Saturday, see Climate section.

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
Very mild and dry weather will continue across the forecast area
through this weekend. The H5 pattern will continue to feature a
shallow longwave ridge across the eastern CONUS. High pressure will
remain across the Southeast U.S. through Sunday night. Recent runs
of the long term guidance has trended slower with the passage of the
cold front. 12z runs times the front pushing off the coast Monday
evening. As a result, Monday temperatures were adjusted warmer, with
highs around 70 degrees. Conditions should turn sharply cooler for
Tuesday and Wednesday. The coldest conditions forecast for Tuesday
night / Wednesday morning, with low temperatures in the upper 20s to
low 30s. The cold temperatures combined with wind speeds between 5
to 10 mph may result in wind chill values around 20 degrees across
inland counties. LREF probs of wind chill values less than 21 peaks
across inland GA with values around 20 percent. Conditions should
remain dry, except for isolated rain showers over the marine zones
late Monday.

&&

.AVIATION /02Z THURSDAY THROUGH MONDAY/...
00Z TAFs: Aviation forecast not as straightforward as the TAFs
may suggest. Elevated 850 mb moisture will gradually pivot
further into SE GA and SE SC overnight in response to weakening
high pressure over the Mid-Atlantic. Ongoing patchy 5-6 kft
ceilings likely to lower, potentially to MVFR, but unlikely to
reach as for east as SAV/CHS/JZI through daybreak. Additionally,
increased upper level clouds through the late evening/overnight
will slide south of SAV through the early morning hours, and
several hours of efficient radiational cooling before daybreak
could bring about some patchy and shallow fog. Again, the
greatest probability (~30%) remains west of the terminals with
the greatest low level moisture, but a brief period of at least
modest visibility restrictions at SAV/CHS/JZI before daybreak
cannot be ruled out.

Nonetheless, the most likely scenario is for the mid of mid and
upper level clouds to mitigate the fog threat, and VFR
conditions to prevail at SAV/CHS/JZI overnight and into Thursday
with light winds.

Extended Aviation Outlook: A brief period of MVFR cigs/vsbys
will be possible Friday morning. Otherwise, expect VFR
conditions to prevail.

&&

.MARINE...
Light winds shift onshore overnight. This, in combination with
T/Td in the lower 60s and SSTs in the mid-to-upper 50s, could
produce the residence times necessary to develop sea fog after
midnight. Probs are only 10-20%, but mariners should be aware of
the potential for rapid visibility reductions over the waters
through mid-morning Thursday. Seas 2 to 3 feet.

Thursday through Monday: Conditions will remain below Small Craft
Advisory criteria through Sunday. Winds will average less than 15
knots with seas 2-4 feet. The main time period of concern is late
Sunday night into Monday as a strong cold front approaches and
sweeps across the Atlantic waters. Winds could develop gusts around
25 kts with seas up to six feet, especially across the outer GA and
nearshore Charleston County waters.

&&

.CLIMATE...
Record High Temperatures:
December 27:
KCHS: 78/2021
KCXM: 76/2015
KSAV: 80/2015

&&

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

&&

$$

NEAR TERM...CEB
SHORT TERM...NED
LONG TERM...NED
AVIATION...CEB/NED/RFM
MARINE...CEB/NED/RFM