651
FZUS52 KCHS 271041
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
641 AM EDT Fri Sep 27 2024

South Santee River SC to Savannah GA out 20 NM and Savannah GA to
Altamaha Sound GA out 60 NM, including Charleston Harbor and
Grays Reef National Marine Sanctuary

AMZ300-272315-
641 AM EDT Fri Sep 27 2024

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Helene will pass to our west and then northwest today into
tonight. Multiple impacts are expected across our area this
morning. Drier weather then arrives later this afternoon and
should persist into next week. Refer to the latest advisory on
Helene issued by the National Hurricane Center.

$$

AMZ330-272315-
Charleston Harbor-
641 AM EDT Fri Sep 27 2024

...TORNADO WATCH 687 IN EFFECT UNTIL 8 AM EDT THIS MORNING...
...TROPICAL STORM WARNING IN EFFECT...
...SMALL CRAFT SHOULD REMAIN IN PORT...

.TODAY...Tropical storm conditions expected. S winds 25 to 35 kt
with gusts to 45 kt, diminishing to 20 to 25 kt with gusts to
35 kt this afternoon. Waves around 4 ft. Showers with a slight
chance of tstms early this morning, then a chance of showers with
a slight chance of tstms late this morning. Some tstms may
produce waterspouts early this morning.
.TONIGHT...SW winds 10 to 15 kt. Gusts to 25 kt in the evening.
.SAT...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon.
.SAT NIGHT...S winds 5 to 10 kt. A slight chance of showers.
.SUN...SW winds 5 to 10 kt. A slight chance of showers early in
the morning.
.SUN NIGHT...SW winds 5 to 10 kt. A slight chance of showers
after midnight.
.MON...SW winds 5 to 10 kt. A slight chance of showers early in
the morning.
.MON NIGHT...SW winds 5 to 10 kt.
.TUE...W winds 5 to 10 kt.
.TUE NIGHT...W winds 5 to 10 kt.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 80 degrees.

$$

AMZ350-272315-
Waters from South Santee River to Edisto Beach SC out 20 NM-
641 AM EDT Fri Sep 27 2024

...TORNADO WATCH 687 IN EFFECT UNTIL 8 AM EDT THIS MORNING...
...TROPICAL STORM WARNING IN EFFECT...
...SMALL CRAFT SHOULD REMAIN IN PORT...

.TODAY...Tropical storm conditions expected. S winds 30 to 40 kt
with gusts to 50 kt, becoming SW 25 to 30 kt with gusts to 40 kt
this afternoon. Seas 12 to 15 ft, subsiding to 9 to 11 ft this
afternoon. Wave Detail: S 15 ft at 10 seconds. Showers with a
slight chance of tstms this morning, then a slight chance of
showers and tstms this afternoon. Some tstms may produce
waterspouts early this morning.
.TONIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after
midnight. Seas 7 to 9 ft, subsiding to 5 to 6 ft after midnight.
Wave Detail: SE 9 ft at 10 seconds.
.SAT...SW winds 10 to 15 kt. Seas 4 to 5 ft, subsiding to 3 to
4 ft in the afternoon. Wave Detail: S 5 ft at 8 seconds and E
1 foot at 11 seconds. A slight chance of showers in the
afternoon.
.SAT NIGHT...S winds 10 kt. Seas 3 to 4 ft, subsiding to 2 to
3 ft after midnight. Wave Detail: S 3 ft at 7 seconds and E 2 ft
at 10 seconds. A chance of showers.
.SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 6 seconds and E 2 ft at 10 seconds. A chance of showers early
in the morning.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 6 seconds and E 1 foot at 10 seconds. A slight chance of
showers.
.MON...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
early in the morning.
.MON NIGHT...W winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers after midnight.
.TUE...W winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
until late afternoon.
.TUE NIGHT...W winds 5 to 10 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ352-272315-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
641 AM EDT Fri Sep 27 2024

...TORNADO WATCH 687 IN EFFECT UNTIL 8 AM EDT THIS MORNING...
...TROPICAL STORM WARNING IN EFFECT...
...SMALL CRAFT SHOULD REMAIN IN PORT...

.TODAY...Tropical storm conditions expected. S winds 35 to 45 kt
with gusts to 55 kt, becoming SW 25 to 30 kt with gusts to 40 kt
this afternoon. Seas 12 to 16 ft, subsiding to 8 to 10 ft this
afternoon. Wave Detail: S 16 ft at 10 seconds. Showers likely
with a slight chance of tstms early this morning, then a slight
chance of showers and tstms late this morning. Some tstms may
produce waterspouts early this morning.
.TONIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after
midnight. Seas 5 to 7 ft, subsiding to 4 to 5 ft after midnight.
Wave Detail: SE 7 ft at 9 seconds.
.SAT...SW winds 10 to 15 kt. Seas 4 to 5 ft, subsiding to 3 to
4 ft in the afternoon. Wave Detail: S 5 ft at 8 seconds and E
1 foot at 11 seconds. A slight chance of showers in the
afternoon.
.SAT NIGHT...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds and E 1 foot at 11 seconds. A chance of showers
until early morning, then a slight chance of showers late.
.SUN...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at
6 seconds and E 1 foot at 10 seconds. A slight chance of showers
early in the morning.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 6 seconds and E 1 foot at 10 seconds. A slight chance of
showers.
.MON...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
early in the morning.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers after midnight.
.TUE...W winds 5 to 10 kt. Seas 1 to 2 ft. A slight chance of
showers early in the morning.
.TUE NIGHT...W winds 5 to 10 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ354-272315-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
641 AM EDT Fri Sep 27 2024

...TROPICAL STORM WARNING IN EFFECT...
...SMALL CRAFT SHOULD REMAIN IN PORT...

.TODAY...Tropical storm conditions expected. S winds 35 to 45 kt
with gusts to 55 kt, becoming SW 25 to 30 kt this afternoon. Seas
10 to 14 ft, subsiding to 7 to 9 ft this afternoon. Wave Detail:
SE 14 ft at 10 seconds. A chance of showers with a slight chance
of tstms early this morning. Some tstms may be severe with
waterspouts.
.TONIGHT...SW winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Seas 4 to 6 ft, subsiding to 4 to 5 ft after midnight.
Wave Detail: SE 6 ft at 9 seconds.
.SAT...SW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to
3 ft in the afternoon. Wave Detail: SE 4 ft at 8 seconds and E
2 ft at 11 seconds. A slight chance of showers in the afternoon.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 7 seconds and E 2 ft at 11 seconds. A chance of
showers until early morning, then a slight chance of showers
late.
.SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft
at 6 seconds and E 2 ft at 11 seconds. A slight chance of showers
early in the morning. A slight chance of showers in the
afternoon.
.SUN NIGHT...SW winds 10 kt. Seas 2 ft. Wave Detail: S 2 ft at
6 seconds and E 1 foot at 10 seconds. A slight chance of showers.
.MON...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
early in the morning. A slight chance of showers and tstms in the
afternoon.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms early in the evening, then a slight chance of
showers in the late evening and overnight.
.TUE...W winds 5 to 10 kt. Seas 1 foot or less. A slight chance
of showers early in the morning.
.TUE NIGHT...W winds 5 to 10 kt. Seas 1 foot or less.

Winds and seas higher in and near tstms.

$$

AMZ374-272315-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
641 AM EDT Fri Sep 27 2024

...TROPICAL STORM WARNING IN EFFECT...
...SMALL CRAFT SHOULD REMAIN IN PORT...

.TODAY...Tropical storm conditions expected. S winds 35 to 45 kt
with gusts to 55 kt, becoming SW 25 to 30 kt this afternoon. Seas
12 to 17 ft, subsiding to 9 to 11 ft this afternoon. Wave Detail:
S 16 ft at 10 seconds. Showers likely with a slight chance of
tstms early this morning, then a slight chance of showers and
tstms late this morning. Some tstms may produce waterspouts early
this morning.
.TONIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 6 to
8 ft, subsiding to 4 to 6 ft after midnight. Wave Detail: S 7 ft
at 9 seconds and E 3 ft at 12 seconds.
.SAT...SW winds 10 to 15 kt. Seas 4 to 5 ft, subsiding to 3 to
4 ft in the afternoon. Wave Detail: SE 4 ft at 7 seconds and E
2 ft at 11 seconds. A slight chance of showers in the afternoon.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail:
SE 3 ft at 7 seconds and E 2 ft at 11 seconds. A chance of
showers.
.SUN...SW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to
3 ft in the afternoon. Wave Detail: S 3 ft at 5 seconds and E
2 ft at 10 seconds. A chance of showers early in the morning,
then a slight chance of showers in the late morning and
afternoon.
.SUN NIGHT...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 3 seconds and SE 2 ft at 6 seconds. A chance of showers.
.MON...W winds 5 to 10 kt. Seas 2 ft. A chance of showers early
in the morning. A slight chance of showers in the late morning
and afternoon. A slight chance of tstms in the afternoon.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of
tstms early in the evening. A slight chance of showers in the
evening, then a chance of showers after midnight.
.TUE...NW winds 5 to 10 kt. Seas 2 ft. A chance of showers early
in the morning, then a slight chance of showers in the late
morning and early afternoon.
.TUE NIGHT...W winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers in the late evening and overnight.

Winds and seas higher in and near tstms.

$$