Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 210817
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
417 AM EDT Thu Sep 21 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.

GMZ005-211430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
417 AM EDT Thu Sep 21 2017

.SYNOPSIS...Weak high pressure will persist for the next several
days, with light to gentle northeast to east breezes prevailing
across Florida Keys coastal waters.

The Approximate Shoreward Edge of the Gulf Stream as of
September 21, 2017,

 2 NM South of Dry Tortugas Light...on Loggerhead Key.
 5 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 4 NM South of Sand Key Light...off Key West.
 6 NM South of Looe Key...off Big Pine Key.
 1 NM South of Sombrero Key Light...off Marathon.
 2 NM Southeast of Alligator Reef Light...off Islamorada.
 1 NM Southeast of Molasses Reef Light...off Key Largo.
 5 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

$$

GMZ031-211430-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
417 AM EDT Thu Sep 21 2017

.TODAY...Northeast winds 5 to 10 knots. Bay waters smooth to a
light chop. Isolated showers and thunderstorms.
.TONIGHT AND FRIDAY...Northeast winds 5 to 10 knots. Bay waters
smooth to a light chop. Isolated showers and thunderstorms.
.FRIDAY NIGHT AND SATURDAY...Northeast winds near 10 knots. Bay
waters a light chop. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...North to northeast winds 5
to 10 knots. Bay waters smooth to a light chop. Scattered showers
and isolated thunderstorms.

$$

GMZ032-035-211430-
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-
417 AM EDT Thu Sep 21 2017

.TODAY...North to northeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. Isolated showers
and thunderstorms.
.TONIGHT AND FRIDAY...Northeast winds 5 to 10 knots. Seas 1 foot
or less. Nearshore waters smooth to a light chop. Isolated showers
and thunderstorms.
.FRIDAY NIGHT AND SATURDAY ...Northeast winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop.
Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...Northeast to east winds 5
to 10 knots. Seas 1 foot or less. Nearshore waters smooth to a
light chop. Scattered showers and isolated thunderstorms.

$$

GMZ042>044-211430-
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-
417 AM EDT Thu Sep 21 2017

.TODAY...Northeast winds 5 to 10 knots.Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers.
.TONIGHT AND FRIDAY...Northeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.FRIDAY NIGHT AND SATURDAY...Northeast winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. Scattered
showers and isolated thunderstorms.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...Northeast to east winds 5
to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light
chop. Scattered showers and isolated thunderstorms.

$$

GMZ052>055-072>075-211430-
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-
417 AM EDT Thu Sep 21 2017

.TODAY...Northeast winds 5 to 10 knots. Seas 2 to 3 feet, except
offshore Ocean Reef to Craig Key, seas 3 to 5 feet due to north-
northeast swells. Isolated showers.
.TONIGHT...Northeast winds near 10 knots. Seas 2 to 3 feet, except
offshore Ocean Reef to Craig Key, seas 3 to 5 feet due to north-
northeast swells. Isolated showers.
.FRIDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet.
Isolated showers and thunderstorms.
.FRIDAY NIGHT AND SATURDAY...Northeast winds 10 to 15 knots. Seas
2 to 4 feet. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...North to northeast winds near 10 knots. Seas 3
to 5 feet. Scattered showers and isolated thunderstorms.
.SUNDAY THROUGH MONDAY NIGHT...Northeast to east winds 5 to 10
knots. Seas 2 to 4 feet. Scattered showers and isolated
thunderstorms.

$$

GMZ033-034-211430-
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-
417 AM EDT Thu Sep 21 2017

.TODAY...North to northeast winds 5 to 10 knots. Seas 1 foot or
less. Isolated showers and thunderstorms.
.TONIGHT AND FRIDAY...Northeast to east winds 5 to 10 knots. Seas
1 to 2 feet. Isolated showers and thunderstorms.
.FRIDAY NIGHT AND SATURDAY...Northeast to east winds 5 to 10
knots. Seas 1 to 2 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY NIGHT THROUGH MONDAY NIGHT...Northeast to east winds 5
to 10 knots. Seas 1 to 2 feet. Scattered showers and isolated
thunderstorms.

$$

BWC



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