Coastal Waters Forecast
Issued by NWS Key West, FL

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FZUS52 KKEY 150930
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
430 AM EST Fri Nov 15 2024

Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef
to south of Dry Tortugas, and the extreme southeastern Gulf of
Mexico, including The Florida Keys National Marine Sanctuary

Seas are given as significant wave height, which is the average
height of the highest 1/3 of the waves. Individual waves may be
more than twice the significant wave height.

Wave Detail will include details about the period and direction
of origin for the highest energy waves. Long-period swells coming
from a different direction than the wind would be included in the
Wave Detail.

GMZ005-151530-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
430 AM EST Fri Nov 15 2024

.SYNOPSIS...A deepening trough moving southeastward off of the
Atlantic Coast has weakened a ridge axis across the Keys,
resulting in collapsing winds. Winds will freshen tonight and
Saturday as the expanding trough moves further out into the
Atlantic and sends a decaying frontal boundary through the Keys.
Thereafter, another high pressure will build into the eastern U.S.
behind the departing trough this weekend promoting moderate to
fresh easterly breezes into early next week.

The Approximate Shoreward Edge of the Gulf Stream as of November
12...

31 NM South of Dry Tortugas Light...on Loggerhead Key.
 9 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 2 NM South of Sand Key Light...off Key West.
 5 NM South of Looe Key...off Big Pine Key.
 8 NM South of Sombrero Key Light...off Marathon.
14 NM Southeast of Alligator Reef Light...off Islamorada.
19 NM Southeast of Molasses Reef Light...off Key Largo.
10 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the National Weather Service in
Key West based on products from the Real Time Ocean Forecast System.

$$

GMZ031-151530-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
430 AM EST Fri Nov 15 2024

.TODAY...Northeast near 5 knots, becoming becoming variable. Bay
waters smooth.
.TONIGHT...Northwest to north winds 10 to 15 knots, becoming
northeast near 15 knots. Bay waters a light to moderate chop,
becoming moderate chop. Isolated showers.
.SATURDAY...Northeast to east winds 15 to 20 knots. Bay waters
choppy.
.SATURDAY NIGHT...Northeast to east winds 15 to 20 knots,
decreasing to near 15 knots. Bay waters choppy, becoming a
moderate chop.
.SUNDAY...Northeast to east winds near 15 knots. Bay waters a
moderate chop.
.SUNDAY NIGHT...East winds near 15 knots. Bay waters a moderate
chop.
.MONDAY THROUGH TUESDAY...East to southeast winds 10 to 15 knots.
Bay waters a light to moderate chop. Isolated showers.
.TUESDAY NIGHT...Southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Isolated showers.

$$

GMZ032-035-151530-
Bayside and Gulf side from Craig Key to west end of Seven Mile
Bridge-
Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
430 AM EST Fri Nov 15 2024

.TODAY...Northeast winds near 5 knots, becoming northwest to
north 5 to 10 knots. Seas 1 foot or less. Nearshore waters smooth,
becoming smooth to a light chop.
.TONIGHT...North to northeast winds 10 to 15 knots, increasing to
near 15 knots. Seas 1 to 2 feet. Nearshore waters a light to
moderate chop, becoming a moderate chop.
.SATURDAY...Northeast to east winds 15 to 20 knots. Seas 2 to 3
feet. Nearshore waters choppy.
.SATURDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 2
to 3 feet, except around 3 feet west of the Marquesas Keys.
Nearshore waters choppy.
.SUNDAY...Northeast to east winds 15 to 20 knots. Seas 2 to 3
feet, except around 3 feet west of the Marquesas Keys. Nearshore
waters choppy.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 3 feet,
except 3 to 4 feet, occasionally to 5 feet west of the Marquesas
Keys. Nearshore waters choppy.
.MONDAY...East to southeast winds 15 to 20 knots, decreasing to
near 15 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally
to 5 feet west of the Marquesas Keys. Nearshore waters choppy,
becoming a moderate chop. Isolated showers.
.MONDAY NIGHT...East to southeast winds 15 knots, decreasing to 10
to 15 knots. Seas subsiding to 1 to 2 feet, except 2 to 3 feet
west of the Marquesas Keys. Nearshore waters a moderate chop,
becoming a light to moderate chop. Isolated showers.
.TUESDAY AND TUESDAY NIGHT...Southeast winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. Isolated
showers.

$$

GMZ042>044-151530-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
430 AM EST Fri Nov 15 2024

.TODAY...Northeast winds 5 to 10 knots, becoming variable. Seas 1
to 2 feet. Nearshore waters smooth to a light chop late.
.TONIGHT...North to northeast winds 10 to 15 knots, becoming
northeast 15 to 20 knots. Seas 1 to 2 feet, building to around 2
feet. Nearshore waters a light to moderate chop, becoming choppy.
Isolated showers.
.SATURDAY...Northeast to east winds 15 to 20 knots, occasionally
to 5 feet. Seas 2 to 4 feet. Nearshore waters choppy.
.SATURDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 2
to 4 feet, occasionally to 5 feet. Nearshore waters a choppy.
.SUNDAY...Northeast to east winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet. Nearshore waters choppy.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy.
.MONDAY...East to southeast winds 15 to 20 knots. Seas 2 to 4
feet, occasionally to 5 feet. Nearshore waters a choppy. Isolated
showers.
.MONDAY NIGHT...East to southeast winds decreasing to near 15
knots. Seas subsiding to 2 to 3 feet. Nearshore waters becoming a
moderate chop. Isolated showers.
.TUESDAY AND TUESDAY NIGHT...Southeast winds near 15 knots. Seas
2 to 3 feet. Nearshore waters a moderate chop. Isolated showers.

$$

GMZ052>055-072>075-151530-
Straits of Florida from Ocean Reef to Craig Key out 20 NM-
Straits of Florida from Craig Key to west end of Seven Mile
Bridge out 20 NM-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal out 20 NM-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas out 20 NM-
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out-
Straits of Florida from Craig Key to west end of Seven Mile
Bridge 20 to 60 NM out-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal 20 to 60 NM out-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas 20 to 60 NM out-
430 AM EST Fri Nov 15 2024

.TODAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Northeast to east 2 feet at 6 seconds.
.TONIGHT...North to northeast winds 10 to 15 knots, increasing to
northeast 15 to 20 knots after midnight. Seas 2 to 3 feet,
building to 3 to 5 feet, occasionally 6 feet. Wave Detail:
Northeast 3 feet at 4 seconds. Isolated showers.
.SATURDAY...Northeast to east winds 15 to 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Wave Detail: Northeast to east
5 feet at 6 seconds.
.SATURDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet.
.SUNDAY...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet.
.MONDAY...East to southeast winds 15 to 20 knots. Seas 3 to 5
feet, occasionally to 6 feet. Isolated showers.
.MONDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Isolated showers.
.TUESDAY...Southeast winds near 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Isolated showers.
.TUESDAY NIGHT...Southeast winds near 15 knots. Seas 2 to 4 feet.
Isolated showers.

$$

GMZ033-034-151530-
Gulf waters from East Cape Sable to Chokoloskee 20 to 60 NM out
and beyond 5 fathoms-
Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel-
430 AM EST Fri Nov 15 2024

.TODAY...North to northeast winds 5 to 10 knots, becoming north.
Seas 1 to 2 feet. Wave Detail: Northeast to east 1 foot at 3
seconds.
.TONIGHT...North to northeast winds 10 to 15 knots, becoming
northeast 15 to 20 knots after midnight. Seas 1 to 2 feet,
building to 2 to 4 feet, occasionally to 5 feet. Wave Detail:
Northwest to north 2 feet at 6 seconds and north to northeast 1
foot at 3 seconds, becoming north 3 feet at 5 seconds.
.SATURDAY...Northeast to east winds 15 to 20 knots. Seas 3 to 4
feet, occasionally to 5 feet. Wave Detail: North to northeast 3
feet at 6 seconds.
.SATURDAY NIGHT AND SUNDAY...East winds 15 to 20 knots. Seas 3 to
4 feet, occasionally to 5 feet.
.SUNDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet.
.MONDAY...East to southeast winds 15 to 20 knots. Seas 3 to 4
feet, occasionally to 5 feet.
.MONDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 3 to
4 feet, occasionally to 5 feet. Isolated showers.
.TUESDAY...Southeast winds 15 to 20 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Isolated showers.
.TUESDAY NIGHT...Southeast winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet. Isolated showers.

$$

AP