Coastal Waters Forecast
Issued by NWS

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810
FZUS52 KKEY 211530
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1030 AM EST Sun Jan 21 2018

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.

GMZ005-212130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1030 AM EST Sun Jan 21 2018

.SYNOPSIS...An Atlantic ridge of high pressure will extend across
the Southeastern United States this afternoon and tonight. This
ridge of high pressure will shift southward down the Florida
peninsula Monday and Monday night, before retreating eastward
Tuesday and Tuesday night. A continental high pressure system will
expand and intensify across the Southeastern United States
Wednesday.

The Approximate Shoreward Edge of the Gulf Stream current, as of
January 19th, 2018...

45 NM South of Dry Tortugas Light, on Loggerhead Key.
33 NM South of Cosgrove Shoal Light, off the Marquesas Keys.
30 NM South of Sand Key Light, off Key West.
28 NM South of Looe Key, off Big Pine Key.
22 NM South of Sombrero Key Light, off Marathon.
13 NM Southeast of Alligator Reef Light, off Islamorada.
 7 NM Southeast of Molasses Reef Light, off Key Largo.
 7 NM East of Carysfort Reef Light, off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic
Office.

$$

GMZ031-212130-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1030 AM EST Sun Jan 21 2018

.THIS AFTERNOON...East winds 10 to 15 knots. Bay waters a light
to moderate chop.
.TONIGHT...East winds near 15 knots. Bay waters a moderate chop.
.MONDAY...East to southeast winds near 15 knots. Bay waters a
moderate chop.
.MONDAY NIGHT...East winds 10 to 15 knots. Bay waters a light to
moderate chop. Isolated showers.
.TUESDAY...Northeast to east winds near 10 knots. Bay waters a
light chop. Isolated showers.
.TUESDAY NIGHT...Northeast winds near 10 knots. Bay waters a light
chop. Isolated showers.
.WEDNESDAY...Northeast winds near 10 knots, increasing to 15 to 20
knots in the afternoon. Bay waters a light chop, becoming choppy.
Isolated showers.
.WEDNESDAY NIGHT...Northeast to east winds 15 to 20 knots. Bay
waters choppy. Isolated showers.
.THURSDAY...Northeast to east winds near 20 knots. Bay waters
rough. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 20 to 25 knots. Bay
waters very rough. Isolated showers.

$$

GMZ032-035-212130-
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 Jan 21 2018

.THIS AFTERNOON...East winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop.
.TONIGHT...East winds 15 to 20 knots. Seas around 2 feet.
Nearshore waters choppy.
.MONDAY...East to southeast winds 15 to 20 knots. Seas around 2
feet. Nearshore waters choppy.
.MONDAY NIGHT...East winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop. Isolated showers.
.TUESDAY...Northeast to east winds 10 to 15 knots. Seas around 1
foot. Nearshore waters a light to moderate chop. Isolated showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 1
foot. Nearshore waters a light to moderate chop. Isolated showers.
.WEDNESDAY...Northeast winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. Seas around 1 foot, building to 2 to 3
feet. Nearshore waters a light to moderate chop, becoming choppy.
Isolated showers.
.WEDNESDAY NIGHT AND THURSDAY...Northeast to east winds near 20
knots. Seas 2 to 4 feet. Nearshore waters rough. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 3
to 4 feet. Nearshore waters very rough. Isolated showers.

$$

GMZ042>044-212130-
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 Jan 21 2018

...SMALL CRAFT SHOULD EXERCISE CAUTION...
...A SMALL CRAFT ADVISORY MAY BE REQUIRED TONIGHT...

.THIS AFTERNOON...East to southeast winds 15 to 20 knots. Seas
2 to 4 feet. Nearshore waters choppy.
.TONIGHT...East to southeast winds near 20 knots, decreasing to 15
to 20 knots late. Nearshore waters rough.
.MONDAY...East to southeast winds 15 to 20 knots. Seas
2 to 4 feet. Nearshore waters choppy.
.MONDAY NIGHT...East winds near 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop. Isolated showers.
.TUESDAY...Northeast to east winds 10 to 15 knots. Seas around 2
feet. Nearshore waters a light to moderate chop. Isolated showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas around 2
feet. Nearshore waters a light to moderate chop. Isolated showers.
.WEDNESDAY...Northeast winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. Seas around 2 feet, building to 2 to 4
feet. Nearshore waters a light to moderate chop, becoming choppy.
Isolated showers.
.WEDNESDAY NIGHT AND THURSDAY...Northeast to east winds near 20
knots. Seas 3 to 4 feet. Nearshore waters rough. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 3
to 5 feet. Nearshore waters very rough. Isolated showers.

$$

GMZ052>055-072>075-212130-
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 Jan 21 2018

...SMALL CRAFT SHOULD EXERCISE CAUTION...
...A SMALL CRAFT ADVISORY MAY BE REQUIRED TONIGHT...

.THIS AFTERNOON...East to southeast winds 15 to 20 knots. Seas 4
to 6 feet. Isolated showers.
.TONIGHT AND MONDAY...East to southeast winds near 20 knots. Seas
building to 5 to 8 feet. Isolated showers.
.MONDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 4 to
6 feet. Isolated showers.
.TUESDAY...Northeast to east winds near 15 knots. Seas 3 to 5
feet. Isolated showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 4 feet.
Isolated showers.
.WEDNESDAY...Northeast winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. Seas 2 to 4 feet, building to 4 to 6
feet. Isolated showers.
.WEDNESDAY NIGHT...Northeast to east winds near 20 knots. Seas 5
to 7 feet. Isolated showers.
.THURSDAY...Northeast to east winds 20 to 25 knots. Seas 6 to 8
feet. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds near 25 knots. Seas 7 to
9 feet. Isolated showers.

$$

GMZ033-034-212130-
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 Jan 21 2018

...SMALL CRAFT SHOULD EXERCISE CAUTION...
...A SMALL CRAFT ADVISORY MAY BE REQUIRED TONIGHT...

.THIS AFTERNOON...East to southeast winds 15 to 20 knots. Seas 3
to 5 feet.
.TONIGHT...East to southeast winds near 20 knots, decreasing to
15 to 20 knots late. Seas 4 to 6 feet.
.MONDAY...East to southeast winds 15 to 20 knots. Seas 3 to 5
feet.
.MONDAY NIGHT...East winds near 15 knots. Seas 2 to 4 feet.
Isolated showers.
.TUESDAY...Northeast to east winds 10 to 15 knots. Seas 2 to 3
feet. Isolated showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.WEDNESDAY...Northeast winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. Seas 2 to 3 feet, building to 3 to 5
feet. Isolated showers.
.WEDNESDAY NIGHT AND THURSDAY...Northeast to east winds near 20
knots. Seas 4 to 6 feet. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 5
to 7 feet. Isolated showers.

$$

Futterman



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