Millen, Georgia Weather Forecast Discussion

155
FXUS62 KCHS 202347
AFDCHS
Area Forecast Discussion
National Weather Service Charleston SC
747 PM EDT Sat Sep 20 2025
.SYNOPSIS...
High pressure will prevail through early next week. A coastal
trough could form near the coast during the middle of next
week, then a cold front will approach from the west late in the
week.
&&
.NEAR TERM /THROUGH SUNDAY/...
Early this evening, an old outflow boundary has triggered
several thunderstorms across the I-95 corridor. These
thunderstorms have pushed east of the sea breeze, encountering
increasingly stable environment. Storms should gradually
dissipate through 930 PM. The rest of the night should feature
dry weather and steady NE winds. Min temperatures are forecast
to range in the mid to upper 60s.
&&
.SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/...
Weak surface high pressure will remain northeast of the area
Sunday into Monday. The upper ridge extending from the western
Atlantic into the eastern United States will gradually shift
east during this period, allowing the 0-6 km flow to become SSE.
Moisture will gradually increase over the area with clouds
increasing Sunday night into Monday. Greater moisture across
coastal southeast GA could support isolated sea breeze
convection Monday afternoon. A weak coastal trough could develop
on Tuesday, though the best forcing will remain offshore. Temps
will continue to be near or slightly above normal.
&&
.LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/...
A closed upper low is forecast to move toward the Southeast mid
to late next week. Surface low pressure and a cold front could
affect the area Friday or Saturday, though guidance continues to
be quite inconsistent on details. Decent rain chances could
begin as early as Thursday.
&&
.AVIATION /00Z SUNDAY THROUGH THURSDAY/...
Prior to the 0Z TAFs, an old outflow boundary has triggered
several thunderstorms across the I-95 corridor. These
thunderstorms have pushed east of the sea breeze, encountering
increasingly stable environment. Storms should gradually
dissipate through 2Z. KCHS will remain close enough to a passing
thunderstorm to support a TEMPO until 2Z. The rest of the night
should feature dry weather and steady NE winds. VFR conditions
expected through the daylight hours Sunday.
Extended Aviation Forecast: Mainly VFR.
&&
.MARINE...
Through Tonight: Onshore winds early will turn to the NE this
evening, then remain sustained 10-15 kt overnight. Winds should
be the strongest at daybreak Sunday, which is when wind gusts
could hit 20 kt, mainly further offshore. Seas should average
2-4 ft.
Sunday through Monday, a wedge of high pressure will build
inland as a trough of lower pressure forms over the Atlantic
waters. This will result in northeast winds of 15-20 knots, with
some gusts near 25 knots possible. Seas generally 3 to 5 feet.
At this time, still expect conditions to remain below SCA
levels.
Tuesday and Wednesday, the wedge of inland high pressure
weakens and moves eastward, with low level winds decreasing and
veering to more east and southeast. Winds generally 15 knots or
less and seas 2 to 4 feet through this period.
Rip Currents: There remains a Moderate Risk of rip currents
along our Georgia beaches into this evening. Moderate Risk
Sunday and Monday due to stronger than normal NE winds and
moderate swells.
&&
.TIDES/COASTAL FLOODING...
Strong northeasterly winds are expected to create larger tidal
departures this weekend, which could result in tide levels
approaching 7 ft MLLW (minor) in Charleston Harbor starting with
this evening`s high tide cycle. The risk for minor coastal
flooding should continue into early next week. Coastal Flood
Advisories could eventually be needed for minor saltwater
flooding in Charleston and Coastal Colleton Counties.
&&
.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...None.
&&
$$
NEAR TERM...NED
SHORT TERM...JRL
LONG TERM...JRL
AVIATION...NED
MARINE...JRL

NWS CHS Office Area Forecast Discussion