Coastal Waters Forecast
Issued by NWS

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000
FZUS52 KKEY 110311
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1011 PM EST Sun Dec 10 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.

GMZ005-110930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1011 PM EST Sun Dec 10 2017

.SYNOPSIS...High pressure will persist northwest of the Florida
Keys overnight through Tuesday. A weak cold front will freshen
northwest to north breezes Tuesday night and Wednesday. High
pressure will slide eastward across the Gulf of Mexico and Florida
Wednesday night through Thursday night. A second cold front will
move to the southeast through the Gulf of Mexico Friday.

The Approximate Shoreward Edge of the Gulf Stream current, as of
December 9th,

16 NM South of Dry Tortugas Light, on Loggerhead Key.
35 NM South of Cosgrove Shoal Light, off the Marquesas Keys.
41 NM South of Sand Key Light, off Key West.
32 NM South of Looe Key, off Big Pine Key.
15 NM South of Sombrero Key Light, off Marathon.
 9 NM Southeast of Alligator Reef Light, off Islamorada.
 2 NM Southeast of Molasses Reef Light, off Key Largo.
 2 NM East of Carysfort Reef Light, off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

$$

GMZ031-110930-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1011 PM EST Sun Dec 10 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.OVERNIGHT...North winds 15 to 20 knots. Bay waters choppy.
.MONDAY...North winds 15 to 20 knots, decreasing to near 10 knots
in the afternoon. Bay waters choppy, becoming a light chop.
.MONDAY NIGHT...North winds near 10 knots. Bay waters a light
chop.
.TUESDAY...Northwest to north winds 10 to 15 knots. Bay waters a
light to moderate chop.
.TUESDAY NIGHT...Northwest winds near 15 knots. Bay waters a
moderate chop. Isolated showers.
.WEDNESDAY...Northwest to north winds 15 to 20 knots, decreasing
to 10 to 15 knots in the afternoon. Bay waters choppy, becoming a
light to moderate chop.
.WEDNESDAY NIGHT...North winds near 10 knots. Bay waters a light
chop.
.THURSDAY...North to northeast winds near 10 knots. Bay waters a
light chop.
.THURSDAY NIGHT...Variable winds 5 to 10 knots. Bay waters smooth
to a light chop. Isolated showers.
.FRIDAY...West winds near 10 knots. Bay waters a light chop.
Isolated showers.
.FRIDAY NIGHT...West to northwest winds 10 to 15 knots. Bay waters
a light to moderate chop. Isolated showers.

$$

GMZ032-035-110930-
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-
1011 PM EST Sun Dec 10 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.OVERNIGHT...North winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy.
.MONDAY...North winds 15 to 20 knots, decreasing to 10 to 15 knots
in the afternoon. Seas 2 to 3 feet, subsiding to 1 to 2 feet.
Nearshore waters choppy, becoming a light to moderate chop.
.MONDAY NIGHT...North winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop.
.TUESDAY...Northwest to north winds near 15 knots. Seas around 2
feet. Nearshore waters a moderate chop.
.TUESDAY NIGHT...Northwest winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy. Isolated showers.
.WEDNESDAY...Northwest to north winds 15 to 20 knots, decreasing
to near 15 knots in the afternoon. Seas 2 to 3 feet, subsiding to
1 to 2 feet. Nearshore waters choppy, becoming a moderate chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop.
.THURSDAY...North to northeast winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop.
.THURSDAY NIGHT...Variable winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. Isolated showers.
.FRIDAY...West winds near 10 knots. Seas 1 foot or less. Nearshore
waters a light chop. Isolated showers.
.FRIDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
around 1 foot. Nearshore waters a light to moderate chop. Isolated
showers.

$$

GMZ042>044-110930-
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-
1011 PM EST Sun Dec 10 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.OVERNIGHT...Northwest to north winds 15 to 20 knots. Seas 2 to 4
feet. Nearshore waters choppy.
.MONDAY...North winds 15 to 20 knots, decreasing to 10 to 15 knots
in the afternoon. Seas 2 to 4 feet, subsiding to around 2 feet.
Nearshore waters choppy, becoming a light to moderate chop.
.MONDAY NIGHT...North winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop.
.TUESDAY...Northwest to north winds near 15 knots. Seas 2 to 3
feet. Nearshore waters a moderate chop.
.TUESDAY NIGHT...Northwest winds 15 to 20 knots. Seas 2 to 4 feet.
Nearshore waters choppy. Isolated showers.
.WEDNESDAY...Northwest to north winds 15 to 20 knots, decreasing
to near 15 knots in the afternoon. Seas 3 to 4 feet, subsiding to
2 to 3 feet. Nearshore waters choppy, becoming a moderate chop.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop.
.THURSDAY...North to northeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop.
.THURSDAY NIGHT...Variable winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. Isolated showers.
.FRIDAY...West winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop. Isolated showers.
.FRIDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop. Isolated
showers.

$$

GMZ052>055-072>075-110930-
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-
1011 PM EST Sun Dec 10 2017

...SMALL CRAFT ADVISORY IN EFFECT...

.OVERNIGHT...Northwest to north winds 15 to 20 knots. Seas 5 to 7
feet, subsiding to 4 to 6 feet.
.MONDAY...North winds 15 to 20 knots, decreasing to 10 to 15 knots
in the afternoon. Seas 4 to 6 feet, subsiding to 3 to 5 feet.
.MONDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 4 feet.
.TUESDAY...Northwest to north winds near 15 knots. Seas 3 to 5
feet.
.TUESDAY NIGHT...Northwest winds 15 to 20 knots. Seas 4 to 6 feet.
Isolated showers.
.WEDNESDAY...Northwest to north winds 15 to 20 knots, decreasing
to near 15 knots in the afternoon. Seas 4 to 6 feet, subsiding to
3 to 5 feet.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 4 feet.
.THURSDAY...North to northeast winds near 10 knots. Seas 2 to 3
feet.
.THURSDAY NIGHT...Variable winds 5 to 10 knots. Seas around 2
feet. Isolated showers.
.FRIDAY...West winds near 10 knots. Seas 2 to 3 feet. Isolated
showers.
.FRIDAY NIGHT...West to northwest winds 10 to 15 knots. Seas 2 to
4 feet. Isolated showers.

$$

GMZ033-034-110930-
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-
1011 PM EST Sun Dec 10 2017

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.OVERNIGHT...North winds 15 to 20 knots. Seas 4 to 6 feet.
.MONDAY...North winds 15 to 20 knots, decreasing to 10 to 15 knots
in the afternoon. Seas 4 to 6 feet, subsiding to 3 to 4 feet.
.MONDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 4 feet.
.TUESDAY...Northwest to north winds near 15 knots. Seas 3 to 4
feet.
.TUESDAY NIGHT...Northwest winds 15 to 20 knots. Seas 3 to 5 feet.
Isolated showers.
.WEDNESDAY...Northwest to north winds 15 to 20 knots, decreasing
to near 15 knots in the afternoon. Seas 4 to 6 feet, subsiding to
3 to 5 feet.
.WEDNESDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 4 feet.
.THURSDAY...North to northeast winds near 10 knots. Seas 2 to 3
feet.
.THURSDAY NIGHT...Variable winds 5 to 10 knots. Seas around 2
feet. Isolated showers.
.FRIDAY...West winds near 10 knots. Seas 2 to 3 feet. Isolated
showers.
.FRIDAY NIGHT...West to northwest winds 10 to 15 knots. Seas 2 to
4 feet. Isolated showers.

$$
BS


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