470
FZUS52 KCHS 270112
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
912 PM EDT Thu Sep 26 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

AMZ300-271415-
912 PM EDT Thu Sep 26 2024

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Hurricane Helene is forecast to move inland across portions of
Florida and Georgia later this evening into Friday. Multiple
impacts are expected across our area through tonight. Drier
weather then arrives later Friday and persists into next week.
Refer to the
latest advisory on Helene issued by the National Hurricane
Center.

$$

AMZ330-271415-
Charleston Harbor-
912 PM EDT Thu Sep 26 2024

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

.REST OF TONIGHT...Tropical storm conditions possible. SE winds
20 to 25 kt with gusts to 35 kt, increasing to 25 to 30 kt with
gusts to 50 kt. Waves 2 to 4 ft. A chance of tstms. Showers. Some
tstms may be severe with tornadoes.
.FRI...Tropical storm conditions possible. S winds 25 to 30 kt
with gusts to 50 kt, diminishing to 20 to 25 kt with gusts to
30 kt in the afternoon. Waves 2 to 4 ft. Showers with a chance of
tstms early in the morning, then a slight chance of showers and
tstms late in the morning. Some tstms may be severe with
tornadoes early in the morning.
.FRI NIGHT...SW winds 10 to 15 kt. Gusts to 25 kt in the evening.
.SAT...SW winds 5 to 10 kt.
.SAT NIGHT...SW winds 5 to 10 kt.
.SUN...SW winds 5 to 10 kt.
.SUN NIGHT...SW winds 5 to 10 kt.
.MON...W winds 5 to 10 kt.
.MON NIGHT...W winds 5 to 10 kt. A slight chance of showers and
tstms in the late evening and early morning.
.TUE...NW winds 5 kt, becoming W in the afternoon.
.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.

$$

AMZ350-271415-
Waters from South Santee River to Edisto Beach SC out 20 NM-
912 PM EDT Thu Sep 26 2024

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

.REST OF TONIGHT...Tropical storm conditions expected. SE winds
25 to 30 kt with gusts to 40 kt, increasing to 30 to 40 kt with
gusts to 50 kt. Seas 7 to 9 ft, building to 9 to 13 ft. Wave
Detail: SE 13 ft at 9 seconds. A chance of tstms. Showers. Some
tstms may be severe with tornadoes.
.FRI...Tropical storm conditions expected. S winds 35 to 40 kt
with gusts to 50 kt, becoming SW 25 to 30 kt with gusts to 40 kt
in the afternoon. Seas 10 to 14 ft, subsiding to 9 to 11 ft in
the afternoon. Wave Detail: S 14 ft at 10 seconds. Showers with a
chance of tstms early in the morning, then a chance of showers
and tstms late in the morning. Some tstms may be severe with
tornadoes early in the morning.
.FRI NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after
midnight. Seas 6 to 8 ft, subsiding to 5 to 7 ft after midnight.
Wave Detail: S 8 ft at 9 seconds.
.SAT...SW winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft
at 8 seconds and E 1 foot at 11 seconds.
.SAT NIGHT...S winds 10 to 15 kt, becoming SW 5 to 10 kt after
midnight. Seas 3 to 4 ft, subsiding to 2 to 3 ft after midnight.
Wave Detail: S 4 ft at 7 seconds and E 2 ft at 11 seconds. A
slight chance of showers and tstms.
.SUN...SW winds 5 to 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 and tstms early in the morning.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers and tstms.
.MON...W winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
and tstms early in the morning. A slight chance of showers and
tstms in the afternoon.
.MON NIGHT...W winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
.TUE...NW winds 5 to 10 kt, becoming W in the afternoon. Seas
2 ft. A slight chance of showers and tstms early in the morning.
A slight chance of showers and tstms in the afternoon.
.TUE NIGHT...W winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-271415-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
912 PM EDT Thu Sep 26 2024

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

.REST OF TONIGHT...Tropical storm conditions. SE winds 25 to
35 kt, increasing to 35 to 40 kt. Gusts to 50 kt, increasing to
55 kt. Seas 8 to 10 ft, building to 10 to 14 ft. Wave Detail: SE
14 ft at 9 seconds. A chance of tstms. Showers. Some tstms may be
severe with tornadoes.
.FRI...Tropical storm conditions expected. S winds 35 to 40 kt
with gusts to 55 kt, becoming SW 25 to 30 kt with gusts to 40 kt
in the afternoon. Seas 9 to 13 ft, subsiding to 7 to 9 ft in the
afternoon. Wave Detail: S 13 ft at 10 seconds. A chance of
showers and tstms early in the morning, then a slight chance of
showers and tstms late in the morning. Some tstms may be severe
with tornadoes early in the morning.
.FRI NIGHT...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.
.SAT NIGHT...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds and E 1 foot at 11 seconds. A slight chance of
showers and tstms in the late evening and early morning.
.SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 6 seconds and E 1 foot at 10 seconds.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
.MON...W winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
and tstms early in the morning. A slight chance of showers and
tstms in the afternoon.
.MON NIGHT...W winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
.TUE...NW winds 5 to 10 kt, becoming W in the afternoon. Seas
1 to 2 ft. A slight chance of showers and tstms early in the
morning. A slight chance of showers and tstms in the afternoon.
.TUE NIGHT...SW winds 5 to 10 kt, becoming W after midnight. Seas
2 ft. A slight chance of showers and tstms early in the evening.

Winds and seas higher in and near tstms.

$$

AMZ354-271415-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
912 PM EDT Thu Sep 26 2024

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

.REST OF TONIGHT...Tropical storm conditions. SE winds 35 to
45 kt with gusts to 60 kt. Seas 8 to 10 ft, building to 10 to
14 ft. Wave Detail: SE 14 ft at 9 seconds. Showers with a chance
of tstms. Some tstms may be severe with tornadoes.
.FRI...Tropical storm conditions expected. S winds 30 to 40 kt
with gusts to 55 kt, becoming SW 25 to 30 kt in the afternoon.
Seas 9 to 11 ft, subsiding to 5 to 7 ft in the afternoon. Wave
Detail: SE 11 ft at 10 seconds. A chance of showers and tstms
early in the morning. Some tstms may be severe with tornadoes.
.FRI NIGHT...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.
.SAT NIGHT...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds and E 2 ft at 11 seconds.
.SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 6 seconds and E 2 ft at 11 seconds.
.SUN NIGHT...SW winds 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
.MON...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 ft. A slight chance of showers and tstms 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 in the evening, then
1 foot or less. A slight chance of showers and tstms.
.TUE...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas
1 foot or less. A slight chance of showers and tstms early in the
morning. A slight chance of showers and tstms in the afternoon.
.TUE NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas
1 foot or less. A slight chance of showers and tstms early in the
evening.

Winds and seas higher in and near tstms.

$$

AMZ374-271415-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
912 PM EDT Thu Sep 26 2024

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

.REST OF TONIGHT...Tropical storm conditions. SE winds 35 to
40 kt with gusts to 55 kt. Seas 10 to 13 ft, building to 13 to
17 ft. Wave Detail: SE 17 ft at 10 seconds. A chance of tstms.
Showers. Some tstms may be severe with tornadoes.
.FRI...Tropical storm conditions expected. S winds 30 to 40 kt
with gusts to 55 kt, becoming SW 25 to 30 kt with gusts to 40 kt
in the afternoon. Seas 11 to 15 ft, subsiding to 8 to 10 ft in
the afternoon. Wave Detail: S 15 ft at 9 seconds. Showers likely
with a chance of tstms early in the morning, then a slight chance
of showers and tstms late in the morning. Some tstms may be
severe with tornadoes early in the morning.
.FRI NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 6 to
8 ft, subsiding to 5 to 7 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.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 7 seconds and E 2 ft at 11 seconds. A chance of showers
with a slight chance of tstms.
.SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 5 seconds and E 2 ft at 10 seconds. A slight chance of showers
and tstms.
.SUN NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A chance of showers
with a slight chance of tstms.
.MON...W winds 5 to 10 kt. Seas 2 ft. A slight chance of tstms. A
chance of showers early in the morning, then a slight chance of
showers in the late morning and afternoon.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers
with a slight chance of tstms.
.TUE...NW winds 5 to 10 kt. Seas 2 ft. A slight chance of tstms.
A chance of showers early in the morning, then a slight chance of
showers in the late morning and afternoon.
.TUE NIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas
2 ft. A slight chance of showers and tstms.

Winds and seas higher in and near tstms.

$$