Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 180921
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
421 AM EST Sun Feb 18 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.

GMZ005-181530-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
421 AM EST Sun Feb 18 2018

.SYNOPSIS...An Atlantic ridge of high pressure will extend across
central Florida and lift northward through tonight. An area of
high pressure will expand and intensify over the western North
Atlantic Ocean Monday through Wednesday.

The Approximate Shoreward Edge of the Gulf Stream as of
February 17, 2018...

31 NM South of Dry Tortugas Light, on Loggerhead Key.
10 NM South of Cosgrove Shoal Light, off the Marquesas Keys.
 3 NM South of Sand Key Light, off Key West.
 7 NM South of Looe Key, off Big Pine Key.
 9 NM South of Sombrero Key Light, off Marathon.
13 NM Southeast of Alligator Reef Light, off Islamorada.
12 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.

$$

GMZ031-181530-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
421 AM EST Sun Feb 18 2018

.TODAY...East winds near 10 knots early, increasing to 10 to 15
knots. Bay waters becoming a light to moderate chop. Isolated
showers.
.TONIGHT...East winds increasing to near 15 knots. Bay waters
becoming a moderate chop. Isolated showers.
.MONDAY...East winds 15 to 20 knots. Bay waters choppy. Isolated
showers.
.MONDAY NIGHT...East to southeast winds near 20 knots. Bay waters
rough. Scattered showers.
.TUESDAY...East to southeast winds near 20 knots. Bay waters
rough. Isolated showers.
.TUESDAY NIGHT...East to southeast winds near 20 knots. Bay
waters choppy. Isolated showers.
.WEDNESDAY...East winds near 15 knots. Bay waters a moderate
chop. Isolated showers.
.WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...East to southeast winds
near 15 knots. Bay waters a moderate chop. Isolated showers.

$$

GMZ032-035-181530-
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-
421 AM EST Sun Feb 18 2018

.TODAY...East winds near 10 knots early, increasing to near 15
knots. Seas 1 to 2 feet. Nearshore waters becoming a moderate
chop. Isolated showers.
.TONIGHT...East winds 15 to 20 knots. Seas 2 to 3 feet. Nearshore
waters choppy. Isolated showers.
.MONDAY...East winds 15 to 20 knots. Seas 2 to 3 feet. Nearshore
waters choppy. Isolated showers.
.MONDAY NIGHT...East to southeast winds near 20 knots. Seas 2 to
4 feet. Nearshore waters rough. Scattered showers.
.TUESDAY...East to southeast winds near 20 knots. Seas 2 to 4
feet. Nearshore waters rough. Isolated showers.
.TUESDAY NIGHT AND WEDNESDAY...East to southeast winds near 20
knots. Seas 2 to 4 feet. Nearshore waters rough. Isolated
showers.
.WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...East to southeast winds
near 15 knots. Seas around 2 feet. Nearshore waters a moderate
chop. Isolated showers.

$$

GMZ042>044-181530-
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-
421 AM EST Sun Feb 18 2018

...SMALL CRAFT ADVISORY MAY BE REQUIRED TONIGHT...

.TODAY...East winds near 10 knots early, increasing to near
15 knots. Seas 2 to 3 feet. Nearshore waters becoming a moderate
chop. Isolated showers.
.TONIGHT...East winds 15 to 20 knots, increasing to near 20
knots. Seas 3 to 4 feet. Nearshore waters choppy becoming rough.
Isolated showers.
.MONDAY...East winds near 20 knots. Seas 3 to 5 feet. Nearshore
waters rough. Isolated showers.
.MONDAY NIGHT...East to southeast winds 20 to 25 knots. Seas 3 to
5 feet. Nearshore waters very rough. Scattered showers.
.TUESDAY...East to southeast winds near 20 knots. Seas 3 to 4
feet. Nearshore waters rough. Isolated showers.
.TUESDAY NIGHT...East to southeast winds 20 to 25 knots. Seas 3
to 5 feet. Nearshore waters very rough. Isolated showers.
.WEDNESDAY...East to southeast winds near 20 knots. Seas 3 to 5
feet. Nearshore waters choppy. Isolated showers.
.WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...East to southeast winds
15 to 20 knots. Seas 3 to 4 feet. Nearshore waters choppy.
Isolated showers.

$$

GMZ052>055-072>075-181530-
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-
421 AM EST Sun Feb 18 2018

...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...
...SMALL CRAFT ADVISORY WILL LIKELY BE REQUIRED TONIGHT...

.TODAY...East winds near 15 knots early, increasing to 15 to 20
knots. Seas 3 to 5 feet building to 4 to 6 feet. Isolated
showers.
.TONIGHT...East winds near 20 knots. Seas 4 to 7 feet. Isolated
showers.
.MONDAY...East winds 20 to 25 knots. Seas 5 to 8 feet. Isolated
showers.
.MONDAY NIGHT...East to southeast winds near 25 knots. Seas 7 to
10 feet. Scattered showers.
.TUESDAY...East to southeast winds near 25 knots. Seas 7 to 10
feet. Isolated showers.
.TUESDAY NIGHT AND WEDNESDAY...East to southeast winds near 25
knots. Seas 7 to 9 feet. Isolated showers.
.WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...East to southeast winds
near 20 knots. Seas subsiding to 5 to 7 feet. Isolated showers.

$$

GMZ033-034-181530-
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-
421 AM EST Sun Feb 18 2018

.TODAY...Mainly east winds near 10 knots early, increasing to
near 15 knots. Seas 1 to 3 feet, building to 3 to 4 feet.
Isolated showers.
.TONIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet. Isolated
showers.
.MONDAY...East to southeast winds 15 to 20 knots. Seas 3 to
5 feet. Isolated showers.
.MONDAY NIGHT...East to southeast winds 20 to 25 knots. Seas 4 to
7 feet. Scattered showers.
.TUESDAY...East to southeast winds near 20 knots. Seas 4 to 6
feet. Isolated showers.
.TUESDAY NIGHT AND WEDNESDAY...East to southeast winds near 20
knots. Seas 4 to 6 feet. Isolated showers.
.WEDNESDAY NIGHT THROUGH THURSDAY NIGHT...East to southeast winds
15 to 20 knots. Seas 3 to 5 feet. Isolated showers.

$$

APA


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