Hanahan, South Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

904
FXUS62 KCHS 230901
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
401 AM EST Sat Nov 23 2024

.SYNOPSIS...
Canadian high pressure will remain the primary feature through
early next week. A cold front will move through Tuesday night,
then a stronger front will move through late next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
Early this morning: Temperatures will continue to drop here
over the next couple of hours. Skies remain clear, and dry
conditions are expected through this morning. The current Frost
Advisory remains until this morning. Elsewhere, patchier frost
will be observed outside of the Frost Advisory area and could
reach as far east as the far interior areas of the coastal
counties of south coastal South Carolina and coastal Georgia.
Lows will range from the the mid 30s well inland to the lower-
mid 40s at the beaches, including Downtown Charleston and areas
right along Lake Moultrie and far eastern portions of Lake
Marion.

Today: Expect light winds and clear skies for today. The deep
upper-level low currently situated over the Northeast will
shift eastward throughout the day and be off over the Atlantic
waters by the afternoon. Meanwhile, a upper-level ridge will
start building down into the Carolinas and prolong this rain-
free period. With ample amount of sunshine, expect highs to be
closer to seasonal normals with highs in the low 60s.

Tonight: This evening, winds should decouple after sunset and
allow for decent radiational cooling overnight bringing
temperatures down to low to mid 30s inland and low to mid 40s
closer to the coastline. Conditions should be supportive of yet
another Frost Advisory as winds are expected to be calm and with
temperatures reaching below 35 degrees in some locations.
Would not be surprised if portions of inland Georgia could
reach the freezing mark by daybreak.

&&

.SHORT TERM /SUNDAY THROUGH TUESDAY/...
A broad upper ridge will remain over the eastern United States
Sunday into Monday, then a shortwave will move through the Great
Lakes Region into the Northeast Monday night and Tuesday. At the
surface, dry high pressure will remain over the Southeast Sunday
into Monday, then a weak cold front moves through on Tuesday. A
dry pattern is expected to persist, with moderating temperatures
throughout the period. High temps should be back in the low to
mid 70s for Monday and Tuesday. Monday morning lows could dip
into the lower 40s far inland.

&&

.LONG TERM /TUESDAY NIGHT THROUGH FRIDAY/...
Temperatures cool down slightly midweek following the Tuesday
cold front, but highs will still reach the lower 70s in most
areas. A digging upper trough late in the week and attending
storm system moving into the Mid-Atlantic region will likely
bring showers to the area late Thursday through Friday. Friday
through Saturday will be markedly colder after a cold front
sweeps through.

&&

.AVIATION /09Z SATURDAY THROUGH WEDNESDAY/...
23/06z TAF Discussion:
KCHS/KJZI/KSAV: TAFs remain in VFR.

Extended Aviation Outlook: VFR.

&&

.MARINE...
The Small Craft Advisory for the Charleston Harbor will expire
at 7 PM.

Today and Tonight: Northwesterly winds will persist at 15 to 20
kt with gusts up to 25 kt till this morning. Therefore, the
current Small Craft Advisories (SCAs) will remain for the
nearshore coastal waters till then. The SCA for outer Georgia
waters remains until 10 AM due to some lingering winds. Winds
should decrease throughout the day and into tonight as the
upper-level ridge from the southwest builds into the Carolinas.
Seas will be 2 to 3 ft in the nearshore waters and 3 to 4 ft in
the outer Georgia waters this morning and then diminish to 1 to
2 ft by tonight.

Sunday through Thursday: High pressure will prevail Sunday
through mid week, with only a slight uptick in winds Tuesday
into Wednesday as a cold front moves through. We could need
Small Craft Advisories for most waters Thursday night into
Friday as a stronger cold front moves through.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...Frost Advisory until 8 AM EST this morning for GAZ087-088-099-
     100.
SC...Frost Advisory until 8 AM EST this morning for SCZ040-042>045-
     052.
MARINE...Small Craft Advisory until 7 AM EST this morning for AMZ350-
     352-354.
     Small Craft Advisory until 10 AM EST this morning for AMZ374.

&&

$$

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