217
FZUS52 KCHS 251503
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
1103 AM EDT Wed Sep 25 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

AMZ300-260330-
1103 AM EDT Wed Sep 25 2024

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will linger across the region today. Tropical
Cyclone Helene is forecasted to track northward across the Gulf
of Mexico, then move inland across portions of Florida and
Georgia Thursday into Friday. Multiple impacts are expected across
our area Thursday and Thursday night. Drier weather then arrives
later Friday and persists into the weekend. Refer to the latest
advisory on Helene issued by the National Hurricane Center.

$$

AMZ330-260330-
Charleston Harbor-
1103 AM EDT Wed Sep 25 2024

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

.REST OF TODAY...SE winds 5 to 10 kt.
.TONIGHT...SE winds 10 kt. A slight chance of showers and tstms
in the late evening and early morning. A chance of showers with a
slight chance of tstms late.
.THU...SE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Waves 1 to 2 ft. A slight chance of tstms.
.THU NIGHT...Tropical storm conditions possible. SE winds 20 to
25 kt, increasing to 25 to 30 kt after midnight. Waves 2 to 4 ft.
Showers with a slight chance of tstms.
.FRI...Tropical storm conditions possible. S winds 25 to 30 kt,
diminishing to 15 to 20 kt in the afternoon. Waves 2 to 4 ft.
Showers in the morning. A slight chance of tstms. A chance of
showers in the afternoon.
.FRI NIGHT...S winds 10 to 15 kt with gusts to 20 kt, becoming SW
5 to 10 kt after midnight. A slight chance of showers early in
the evening.
.SAT...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon.
.SAT NIGHT...SW winds 5 to 10 kt. A slight chance of showers
after midnight.
.SUN...NW winds 5 to 10 kt, becoming S in the afternoon. A slight
chance of showers in the morning, then a chance of showers with a
slight chance of tstms in the afternoon.
.SUN NIGHT...SE winds 5 to 10 kt, becoming NE after midnight. A
chance of showers with a slight chance of tstms early in the
evening, then a slight chance of showers in the late evening and
overnight.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 80 degrees.

$$

AMZ350-260330-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1103 AM EDT Wed Sep 25 2024

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

.REST OF TODAY...SE winds 5 to 10 kt, increasing to 10 to 15 kt
this afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds
and E 2 ft at 11 seconds.
.TONIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft, building to 4 to 5 ft after midnight. Wave Detail: SE 4 ft
at 6 seconds and E 2 ft at 10 seconds. A slight chance of showers
and tstms in the late evening and early morning. A chance of
showers with a slight chance of tstms late.
.THU...SE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft,
building to 5 to 7 ft in the afternoon. Wave Detail: SE 6 ft at
7 seconds and E 2 ft at 10 seconds. A slight chance of tstms.
.THU NIGHT...Tropical storm conditions expected. SE winds 25 to
35 kt with gusts to 45 kt. Seas 8 to 10 ft, building to 11 to
15 ft after midnight. Wave Detail: SE 13 ft at 9 seconds. Showers
with a slight chance of tstms.
.FRI...Tropical storm conditions possible. S winds 25 to 30 kt,
diminishing to 20 to 25 kt in the afternoon. Gusts to 35 kt in
the afternoon. Seas 9 to 13 ft, subsiding to 8 to 10 ft in the
afternoon. Wave Detail: S 13 ft at 9 seconds. Showers in the
morning. A slight chance of tstms. A chance of showers in the
afternoon.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 5 to 7 ft, subsiding to
4 to 6 ft after midnight. Wave Detail: S 7 ft at 9 seconds and E
2 ft at 11 seconds. A slight chance of showers until early
morning.
.SAT...SW winds 10 kt. Seas 3 to 4 ft.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers late in the evening. A chance of showers after
midnight.
.SUN...NW winds 5 to 10 kt, becoming SE in the afternoon. Seas
2 to 3 ft. A chance of showers until late afternoon. A slight
chance of tstms in the afternoon. A slight chance of showers
late.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 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.

Winds and seas higher in and near tstms.

$$

AMZ352-260330-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1103 AM EDT Wed Sep 25 2024

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

.REST OF TODAY...SE winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: SE 2 ft at 4 seconds and E 2 ft at 10 seconds.
.TONIGHT...SE winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft,
building to 4 to 5 ft after midnight. Wave Detail: SE 4 ft at
6 seconds and E 2 ft at 10 seconds. A slight chance of showers
and tstms late in the evening. A chance of showers with a slight
chance of tstms after midnight.
.THU...SE winds 15 to 20 kt. Gusts to 30 kt. Seas 4 to 5 ft,
building to 6 to 8 ft in the afternoon. Wave Detail: SE 7 ft at
7 seconds and E 1 foot at 10 seconds. A slight chance of tstms.
Showers likely in the morning, then showers in the afternoon.
.THU NIGHT...Tropical storm conditions expected. SE winds 25 to
35 kt with gusts to 50 kt. Seas 9 to 11 ft, building to 12 to
16 ft after midnight. Wave Detail: SE 14 ft at 9 seconds. Showers
with a slight chance of tstms.
.FRI...Tropical storm conditions possible. S winds 25 to 35 kt
with gusts to 45 kt, diminishing to 20 to 25 kt with gusts to
35 kt in the afternoon. Seas 9 to 13 ft, subsiding to 7 to 9 ft
in the afternoon. Wave Detail: S 13 ft at 9 seconds. Showers with
a slight chance of tstms early in the morning, then a slight
chance of showers in the late morning and early afternoon.
.FRI NIGHT...SW winds 10 to 15 kt. 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 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft in
the afternoon.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers in the evening, then a chance of showers after
midnight.
.SUN...W winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to
3 ft. A chance of showers until late afternoon. A slight chance
of tstms in the afternoon. A slight chance of showers late.
.SUN NIGHT...S winds 5 to 10 kt. Seas 2 to 3 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.

Winds and seas higher in and near tstms.

$$

AMZ354-260330-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1103 AM EDT Wed Sep 25 2024

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

.REST OF TODAY...SE winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: SE 3 ft at 5 seconds and E 2 ft at 10 seconds. A slight
chance of showers late this morning and early afternoon.
.TONIGHT...SE winds 15 to 20 kt with gusts to 25 kt. Seas 3 to
4 ft, building to 4 to 5 ft after midnight. Wave Detail: SE 5 ft
at 6 seconds and E 2 ft at 10 seconds. A slight chance of tstms.
.THU...Tropical storm conditions possible. SE winds 15 to 20 kt
with gusts to 25 kt, increasing to 20 to 25 kt with gusts to
35 kt in the afternoon. Seas 5 to 6 ft, building to 6 to 8 ft in
the afternoon. Wave Detail: SE 7 ft at 7 seconds and E 1 foot at
10 seconds. A slight chance of tstms. Showers.
.THU NIGHT...Tropical storm conditions expected. SE winds 25 to
35 kt with gusts to 50 kt. Seas 9 to 13 ft, building to 11 to
15 ft after midnight. Wave Detail: SE 15 ft at 10 seconds.
Showers with a slight chance of tstms.
.FRI...Tropical storm conditions possible. S winds 25 to 35 kt
with gusts to 45 kt, diminishing to 20 to 25 kt with gusts to
30 kt in the afternoon. Seas 8 to 10 ft, subsiding to 6 to 8 ft
in the afternoon. Wave Detail: S 10 ft at 7 seconds and SE 10 ft
at 10 seconds. Showers with a slight chance of tstms early in the
morning, then a slight chance of showers in the late morning and
early afternoon.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 4 to 5 ft, subsiding to
3 to 4 ft after midnight. Wave Detail: SE 5 ft at 8 seconds and E
3 ft at 10 seconds.
.SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms in the afternoon.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of tstms early in the evening. A slight chance of showers.
.SUN...W winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to
3 ft. A chance of showers. A slight chance of tstms in the
afternoon.
.SUN NIGHT...S winds 5 to 10 kt. Seas 2 ft. A chance of showers
with a slight chance of tstms early in the evening, then a slight
chance of showers late in the evening. A chance of showers after
midnight.

Winds and seas higher in and near tstms.

$$

AMZ374-260330-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1103 AM EDT Wed Sep 25 2024

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

.REST OF TODAY...SE winds 10 to 15 kt. Seas 4 to 5 ft. Wave
Detail: E 4 ft at 11 seconds and SE 3 ft at 4 seconds.
.TONIGHT...SE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
6 ft, building to 5 to 7 ft after midnight. Wave Detail: SE 6 ft
at 6 seconds and E 3 ft at 10 seconds. A slight chance of tstms.
.THU...Tropical storm conditions possible. SE winds 15 to 20 kt
with gusts to 25 kt, increasing to 20 to 25 kt with gusts to
35 kt in the afternoon. Seas 6 to 8 ft, building to 8 to 10 ft in
the afternoon. Wave Detail: SE 8 ft at 7 seconds and E 2 ft at
10 seconds. A slight chance of tstms. Showers likely early in the
morning, then showers in the late morning and afternoon.
.THU NIGHT...Tropical storm conditions expected. SE winds 25 to
35 kt with gusts to 50 kt. Seas 11 to 15 ft, building to 14 to
17 ft after midnight. Wave Detail: SE 16 ft at 9 seconds. Showers
with a slight chance of tstms.
.FRI...Tropical storm conditions possible. S winds 25 to 30 kt
with gusts to 45 kt, diminishing to 20 to 25 kt with gusts to
35 kt in the afternoon. Seas 10 to 14 ft, subsiding to 7 to 9 ft
in the afternoon. Wave Detail: S 14 ft at 9 seconds. Showers
early in the morning. A slight chance of tstms in the morning. A
slight chance of showers in the late morning and afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 5 to
7 ft, subsiding to 4 to 5 ft after midnight. Wave Detail: S 6 ft
at 8 seconds and E 3 ft at 12 seconds. A slight chance of
showers.
.SAT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Seas 3 to 4 ft. A slight chance of showers. A slight
chance of tstms in the afternoon.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 3 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.
.SUN...W winds 5 to 10 kt. Seas 3 ft. A chance of showers until
late afternoon. A slight chance of tstms in the afternoon. A
slight chance of showers late.
.SUN NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of tstms early in the evening. A chance of showers.

Winds and seas higher in and near tstms.

$$