Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 171530
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1030 AM EST Sun Dec 17 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.

GMZ005-172130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1030 AM EST Sun Dec 17 2017

.SYNOPSIS...An Atlantic ridge of high pressure will extend across
northern Florida, from this afternoon through Tuesday. The ridge
then will shift southward across the Florida Peninsula, Tuesday
night through Thursday night.

The Approximate Shoreward Edge of the Gulf Stream as of
December 16, 2017,

30 NM South of Dry Tortugas Light, on Loggerhead Key.
17 NM South of Cosgrove Shoal Light, off the Marquesas Keys.
26 NM South of Sand Key Light, off Key West.
32 NM South of Looe Key, off Big Pine Key.
29 NM South of Sombrero Key Light, off Marathon.
14 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.

$$

GMZ031-172130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1030 AM EST Sun Dec 17 2017

.THIS AFTERNOON...Northeast to east winds near 15 knots. Bay
waters a moderate chop.
.TONIGHT THROUGH TUESDAY...East winds 10 to 15 knots. Bay waters a
light to moderate chop.
.TUESDAY NIGHT...East to southeast winds near 10 knots. Bay waters
a light chop.
.WEDNESDAY...Southeast winds near 10 knots. Bay waters a light
chop.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters
smooth to a light chop.
.THURSDAY...Southeast winds 5 to 10 knots. Bay waters mostly
smooth.
.THURSDAY NIGHT...East to southeast winds 5 to 10 knots. Bay
waters mostly smooth.

$$

GMZ032-035-172130-
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-
1030 AM EST Sun Dec 17 2017

.THIS AFTERNOON...Northeast to east winds near 15 knots. Seas 1
to 2 feet. Nearshore waters a moderate chop.
.TONIGHT THROUGH TUESDAY...East winds near 15 knots. Seas 1 to 2
feet. Nearshore waters a moderate chop.
.TUESDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
around 1 foot. Nearshore waters a light to moderate chop.
.WEDNESDAY...Southeast winds near 10 knots. Seas 1 foot or less.
Nearshore waters a light chop.
.WEDNESDAY NIGHT AND THURSDAY...Southeast winds 5 to 10 knots.
Seas less than 1 foot. Nearshore waters smooth to a light chop.
.THURSDAY NIGHT...East to southeast winds near 10 knots. Seas 1
foot or less. Nearshore waters a light chop.

$$

GMZ042>044-172130-
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-
1030 AM EST Sun Dec 17 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.THIS AFTERNOON...East winds 15 to 20 knots. Seas 2 to 4 feet.
Nearshore waters choppy.
.TONIGHT THROUGH TUESDAY...East winds near 15 knots. Seas 2 to 3
feet. Nearshore waters a moderate chop.
.TUESDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop.
.WEDNESDAY...Southeast winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop.
.WEDNESDAY NIGHT AND THURSDAY...Southeast winds 5 to 10 knots.
Seas around 1 foot. Nearshore waters smooth to a light chop.
.THURSDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop.

$$

GMZ052>055-072>075-172130-
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-
1030 AM EST Sun Dec 17 2017

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...East winds near 20 knots. Seas 5 to 7 feet.
.TONIGHT AND MONDAY...East winds 15 to 20 knots. Seas 4 to 6 feet.
Isolated showers.
.MONDAY NIGHT AND TUESDAY...East winds 15 to 20 knots. Seas 4 to 6
feet.
.TUESDAY NIGHT...East to southeast winds near 15 knots. Seas 3 to
5 feet.
.WEDNESDAY...Southeast winds 10 to 15 knots. Seas 2 to 4 feet.
Isolated showers.
.WEDNESDAY NIGHT AND THURSDAY...Southeast winds near 10 knots.
Seas 2 to 3 feet. Isolated showers.
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 2
to 4 feet.

$$

GMZ033-034-172130-
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-
1030 AM EST Sun Dec 17 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.THIS AFTERNOON...Northeast to east winds 15 to 20 knots. Seas 3
to 5 feet.
.TONIGHT THROUGH TUESDAY...East winds near 15 knots. Seas 2 to 4
feet.
.TUESDAY NIGHT...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet.
.WEDNESDAY...Southeast winds near 10 knots. Seas around 2 feet.
.WEDNESDAY NIGHT AND THURSDAY...Southeast winds 5 to 10 knots.
Seas 1 to 2 feet.
.THURSDAY NIGHT...East to southeast winds near 10 knots. Seas
around 2 feet.

$$

Kasper



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