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National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 240833
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
433 AM EDT Thu Jun 24 2021

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.

GMZ005-241445-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
433 AM EDT Thu Jun 24 2021

SYNOPSIS
Periods of unsettled weather are expected through
tonight due to the presence of an upper-level trough over South
Florida and an upper-tropospheric low in the vicinity of Cuba.
Thereafter, high pressure will bridge across the Florida Keys
marine zones, resulting in freshening east to southeast breezes
tonight and into the weekend, with wind speeds likely highest in
the overnight and early morning hours.

The Approximate Shoreward Edge of the Gulf Stream as of
June 24, 2021...

28 NM South of Dry Tortugas Light...on Loggerhead Key.
11 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
11 NM South of Sand Key Light...off Key West.
20 NM South of Looe Key...off Big Pine Key.
19 NM South of Sombrero Key Light...off Marathon.
11 NM Southeast of Alligator Reef Light...off Islamorada.
 7 NM Southeast of Molasses Reef Light...off Key Largo.
 8 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.



GMZ031-241445-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
433 AM EDT Thu Jun 24 2021

TODAY
East winds near 10 knots. Bay waters a light chop.
Winds and seas higher near numerous showers and scattered
thunderstorms.

TONIGHT
East to southeast winds 15 to 20 knots. Bay waters
choppy. Scattered showers and thunderstorms.

FRIDAY
East winds 15 to 20 knots, decreasing to near 15 knots.
Bay waters choppy, becoming a moderate chop. Scattered showers
and isolated thunderstorms.

FRIDAY NIGHT
East winds 15 to 20 knots. Bay waters choppy.
Scattered showers and isolated thunderstorms.

SATURDAY
East winds decreasing to 10 to 15 knots. Bay waters
becoming a light to moderate chop. Scattered showers and isolated
thunderstorms.

SATURDAY NIGHT THROUGH MONDAY NIGHT
East winds 10 to 15 knots.
Bay waters a light to moderate chop. Scattered showers and
isolated thunderstorms. 



GMZ032-035-241445-
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-
433 AM EDT Thu Jun 24 2021

TODAY
Northeast to east winds 10 to 15 knots. Seas 1 foot or
less. Nearshore waters a light to moderate chop. Winds and seas
higher near numerous showers and scattered thunderstorms.

TONIGHT
East to southeast winds 15 to 20 knots. Seas 1 to
3 feet. Nearshore waters choppy. Scattered showers and
thunderstorms.

FRIDAY
East winds 15 to 20 knots, decreasing to near 15 knots.
Seas 1 to 3 feet. Nearshore waters choppy, becoming a moderate
chop. Scattered showers and isolated thunderstorms.

FRIDAY NIGHT
East winds 15 to 20 knots. Seas 1 to 3 feet.
Nearshore waters choppy. Scattered showers and isolated
thunderstorms.

SATURDAY
East to southeast winds decreasing to 10 to 15 knots.
Seas subsiding to 1 to 2 feet. Nearshore waters becoming a light
to moderate chop. Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
East winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop. Scattered showers and isolated
thunderstorms.

SUNDAY THROUGH MONDAY NIGHT
East to southeast winds 10 to 15
knots. Seas 1 to 2 feet. Nearshore waters a light to moderate
chop. Scattered showers and isolated thunderstorms.



GMZ042>044-241445-
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-
433 AM EDT Thu Jun 24 2021

TODAY
Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Winds and seas
higher near numerous showers and scattered thunderstorms.

TONIGHT
East to southeast winds 15 to 20 knots. Seas 2 to
4 feet. Nearshore waters choppy. Scattered showers and
thunderstorms.

FRIDAY
East winds 15 to 20 knots, decreasing to near 15 knots.
Seas 2 to 4 feet. Nearshore waters choppy, becoming a moderate
chop. Scattered showers and isolated thunderstorms.

FRIDAY NIGHT
East to southeast winds 15 to 20 knots. Seas 2 to
4 feet. Nearshore waters choppy. Scattered showers and isolated
thunderstorms.

SATURDAY
East winds decreasing to 10 to 15 knots. Seas
subsiding to 2 to 3 feet. Nearshore waters becoming a light to
moderate chop. Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
East to southeast winds near 15 knots. Seas
2 to 3 feet. Nearshore waters a moderate chop. Scattered showers
and isolated thunderstorms.

SUNDAY THROUGH MONDAY NIGHT
East to southeast winds 10 to 15
knots. Seas 1 to 3 feet. Nearshore waters a light to moderate
chop. Scattered showers and isolated thunderstorms.



GMZ052>055-072>075-241445-
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-
433 AM EDT Thu Jun 24 2021

TODAY
Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Winds and seas higher near numerous showers and scattered
thunderstorms.

TONIGHT
East to southeast winds 15 to 20 knots. Seas 3 to
5 feet. Scattered showers and thunderstorms.

FRIDAY
East winds 15 to 20 knots, decreasing to near 15 knots.
Seas 3 to 5 feet. Scattered showers and isolated thunderstorms.

FRIDAY NIGHT
East to southeast winds 15 to 20 knots. Seas 3 to
5 feet. Scattered showers and isolated thunderstorms.

SATURDAY
East winds decreasing to 10 to 15 knots. Seas
subsiding to 2 to 4 feet. Scattered showers and isolated
thunderstorms.

SATURDAY NIGHT
East to southeast winds 10 to 15 knots. Seas
2 to 4 feet. Scattered showers and isolated thunderstorms.

SUNDAY THROUGH MONDAY NIGHT
East winds 10 to 15 knots. Seas 2
to 4 feet. Scattered showers and isolated thunderstorms.



GMZ033-034-241445-
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-
433 AM EDT Thu Jun 24 2021

TODAY
Northeast to east winds 10 to 15 knots. Seas 1 to 2
feet. Winds and seas higher near numerous showers and scattered
thunderstorms.

TONIGHT
East to southeast winds 15 to 20 knots. Seas 2 to
3 feet. Scattered showers and thunderstorms.

FRIDAY
East winds 15 to 20 knots, decreasing to near 15 knots.
Seas 2 to 4 feet. Scattered showers and isolated thunderstorms.

FRIDAY NIGHT
East to southeast winds 15 to 20 knots. Seas 2 to
4 feet. Scattered showers and isolated thunderstorms.

SATURDAY
East to southeast winds decreasing to 10 to 15 knots.
Seas subsiding to 2 to 3 feet. Scattered showers and isolated
thunderstorms.

SATURDAY NIGHT THROUGH MONDAY NIGHT
East to southeast winds 10
to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated
thunderstorms.