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National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 180822
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
422 AM EDT Fri Aug 18 2017

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.

GMZ005-181430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
422 AM EDT Fri Aug 18 2017

SYNOPSIS
An upper level area of low pressure will pass westward
through the Florida Straits today and tonight. A tropical wave,
currently near the Dominican Republic, will approach the Florida
Keys Saturday. This tropical wave will pass through the forecast
area Saturday night, before entering the southeastern Gulf of
Mexico Sunday.

The Approximate Shoreward Edge of the Gulf Stream current, as of
August 17th, 2017,

22 NM South of Dry Tortugas Light...on Loggerhead Key.
12 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
11 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
15 NM South of Sombrero Key Light...off Marathon.
11 NM Southeast of Alligator Reef Light...off Islamorada.
 9 NM Southeast of Molasses Reef Light...off Key Largo.
 6 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.



GMZ031-181430-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
422 AM EDT Fri Aug 18 2017

TODAY
East winds near 10 knots. Bay waters a light chop.
Scattered showers and isolated thunderstorms.

TONIGHT
Northeast to east winds 10 to 15 knots. Bay waters a
light to moderate chop. Scattered showers and isolated
thunderstorms.

SATURDAY
Northeast to east winds near 10 knots. Bay waters a
light chop. Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
Northeast to east winds near 10 knots, becoming
southeast and increasing to 10 to 15 knots after midnight. Bay
waters a light to moderate chop. Numerous showers and scattered
thunderstorms.

SUNDAY
Southeast winds near 15 knots. Bay waters a moderate
chop. Scattered showers and thunderstorms.

SUNDAY NIGHT AND MONDAY
East to southeast winds 15 to 20 knots.
Bay waters choppy. Scattered showers and isolated thunderstorms.

MONDAY NIGHT
East to southeast winds near 15 knots. Bay waters
a moderate chop. Scattered showers and isolated thunderstorms.

TUESDAY
East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Scattered showers and isolated
thunderstorms.

TUESDAY NIGHT
Southeast winds near 10 knots. Bay waters a light
chop. Scattered showers and isolated thunderstorms.



GMZ032-035-181430-
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-
422 AM EDT Fri Aug 18 2017

TODAY
East winds 10 to 15 knots. Seas around 1 foot. Nearshore
waters a light to moderate chop. Scattered showers and isolated
thunderstorms.

TONIGHT AND SATURDAY
Northeast to east winds 10 to 15 knots.
Seas around 1 foot. Nearshore waters a light to moderate chop.
Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
Northeast to east winds 10 to 15 knots, becoming
southeast after midnight. Seas around 1 foot. Nearshore waters a
light to moderate chop. Numerous showers and scattered
thunderstorms.

SUNDAY
Southeast winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop. Scattered showers and
thunderstorms. 

SUNDAY NIGHT AND MONDAY
East to southeast winds 15 to 20 knots.
Seas around 2 feet. Nearshore waters choppy. Scattered showers and
isolated thunderstorms.

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

TUESDAY
East to southeast winds 10 to 15 knots. Seas around 1
foot. Nearshore waters a light to moderate chop. Scattered showers
and isolated thunderstorms.

TUESDAY NIGHT
Southeast winds 10 to 15 knots. Seas around 1
foot. Nearshore waters a light to moderate chop. Scattered showers
and isolated thunderstorms.



GMZ042>044-181430-
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-
422 AM EDT Fri Aug 18 2017

TODAY
East winds 10 to 15 knots. Seas around 2 feet. Nearshore
waters a light to moderate chop. Scattered showers and isolated
thunderstorms.

TONIGHT AND SATURDAY
Northeast to east winds 10 to 15 knots.
Seas around 2 feet. Nearshore waters a light to moderate chop.
Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
Northeast to east winds 10 to 15 knots, becoming
southeast after midnight. Seas around 2 feet. Nearshore waters a
light to moderate chop. Numerous showers and scattered
thunderstorms.

SUNDAY
Southeast winds near 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop. Scattered showers and
thunderstorms. 

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

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

TUESDAY NIGHT
Southeast winds 10 to 15 knots. Seas around 2
feet. Nearshore waters a light to moderate chop. Scattered showers
and isolated thunderstorms.



GMZ052>055-072>075-181430-
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-
422 AM EDT Fri Aug 18 2017

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

TONIGHT AND SATURDAY
Northeast to east winds 10 to 15 knots.
Seas 2 to 4 feet. Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
Northeast to east winds 10 to 15 knots, becoming
southeast and increasing to near 15 knots after midnight. Seas 2
to 4 feet, building to 3 to 5 feet. Numerous showers and scattered
thunderstorms. 

SUNDAY
Southeast winds 15 to 20 knots. Seas 4 to 6 feet.
Scattered showers and thunderstorms.

SUNDAY NIGHT AND MONDAY
East to southeast winds near 20 knots.
Seas 5 to 7 feet. Scattered showers and isolated thunderstorms.

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

TUESDAY
East to southeast winds near 15 knots. Seas 3 to 5
feet. Scattered showers and isolated thunderstorms.

TUESDAY NIGHT
Southeast winds near 15 knots. Seas 3 to 5 feet.
Scattered showers and isolated thunderstorms.



GMZ033-034-181430-
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-
422 AM EDT Fri Aug 18 2017

TODAY
East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers and isolated thunderstorms.

TONIGHT AND SATURDAY
Northeast to east winds 10 to 15 knots.
Seas 2 to 3 feet. Scattered showers and isolated thunderstorms.

SATURDAY NIGHT
Northeast to east winds 10 to 15 knots, becoming
southeast after midnight. Seas 2 to 3 feet. Numerous showers and
scattered thunderstorms.

SUNDAY
Southeast winds near 15 knots. Seas 2 to 4 feet.
Scattered showers and thunderstorms.

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

TUESDAY
East to southeast winds near 15 knots. Seas 2 to 4
feet. Scattered showers and isolated thunderstorms.

TUESDAY NIGHT
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Scattered showers and isolated thunderstorms.


BS