Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 202124
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
424 PM EST Sat Jan 20 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.

GMZ005-210330-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
424 PM EST Sat Jan 20 2018

.SYNOPSIS...An area of high pressure will extend from the
southeastern United States to the western North Atlantic Ocean
tonight through Sunday. This system will weaken and shift eastward
Monday and Tuesday. Another continental high pressure system will
expand and intensify across the southeastern United States
Wednesday and Thursday.

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

$$

GMZ031-210330-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
424 PM EST Sat Jan 20 2018

.TONIGHT...Northeast to east winds near 10 knots. Bay waters a
light chop.
.SUNDAY...East winds 10 to 15 knots. Bay waters a light to
moderate chop. Isolated showers.
.SUNDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. Isolated showers.
.MONDAY AND MONDAY NIGHT...East winds 5 to 10 knots. Bay waters
smooth to a light chop. Isolated showers.
.TUESDAY...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. Isolated showers.
.TUESDAY NIGHT...Northeast to east winds near 10 knots. Bay waters
a light chop. Isolated showers.
.WEDNESDAY...Northeast winds 10 to 15 knots. Bay waters a light
to moderate chop. Isolated showers.
.WEDNESDAY NIGHT...Northeast winds near 15 knots. Bay waters a
moderate chop. Isolated showers.
.THURSDAY...Northeast winds 15 to 20 knots. Bay waters choppy.
Isolated showers.
.THURSDAY NIGHT...Northeast winds 20 to 25 knots. Bay waters very
rough. Isolated showers.

$$

GMZ032-035-210330-
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-
424 PM EST Sat Jan 20 2018

.TONIGHT...Northeast to east winds 10 to 15 knots. Seas 1 to 2
feet. Nearshore waters a light to moderate chop.
.SUNDAY...Northeast to east winds 10 to 15 knots. Seas 1 to 2
feet. Nearshore waters a light to moderate chop. Isolated
showers.
.SUNDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.MONDAY...East winds near 10 knots. Seas around 1 foot. Nearshore
waters a light chop. Isolated showers.
.MONDAY NIGHT AND TUESDAY...East winds 5 to 10 knots. Seas 1 foot
or less. Nearshore waters smooth to a light chop. Isolated
showers.
.TUESDAY NIGHT...Northeast winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Isolated showers.
.WEDNESDAY...Northeast winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots. Seas 1 to 3
feet. Nearshore waters choppy. Isolated showers.
.THURSDAY...Northeast winds 15 to 20 knots. Seas 1 to 3 feet.
Nearshore waters choppy. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 2
to 5 feet. Nearshore waters very rough. Isolated showers.

$$

GMZ042>044-210330-
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-
424 PM EST Sat Jan 20 2018

.TONIGHT...Northeast to east winds near 15 knots. Seas 2 to 4
feet. Nearshore waters a moderate chop.
.SUNDAY...East winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore
waters choppy. Isolated showers.
.SUNDAY NIGHT...East winds near 15 knots. Seas 2 to 4 feet.
Nearshore waters a moderate chop. Isolated showers.
.MONDAY AND MONDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3
feet. Nearshore waters a light to moderate chop. Isolated
showers.
.TUESDAY...Northeast to east winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.WEDNESDAY...Northeast winds near 15 knots. Seas 1 to 3 feet.
Nearshore waters a moderate chop. Isolated showers.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots. Seas 2 to
4 feet. Nearshore waters choppy. Isolated showers.
.THURSDAY...Northeast 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 5 feet. Nearshore waters very rough. Isolated showers.

$$

GMZ052>055-072>075-210330-
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-
424 PM EST Sat Jan 20 2018

...SMALL CRAFT ADVISORY IN EFFECT...

.TONIGHT...Northeast to east winds 15 to 20 knots early, becoming
east and increasing to near 20 knots. seas 4 to 6 feet, building
to 5 to 7 feet. Isolated showers developing after midnight.
.SUNDAY...East winds near 20 knots. Seas 5 to 7 feet. Isolated
showers.
.SUNDAY NIGHT...East to southeast winds near 20 knots. Seas 4 to
7 feet. Scattered showers.
.MONDAY...East winds 15 to 20 knots. Seas 4 to 6 feet. Isolated
showers.
.MONDAY NIGHT...East winds near 15 knots, decreasing to 10 to 15
knots. Seas 3 to 5 feet. Isolated showers.
.TUESDAY...Northeast to east winds near 10 knots. Seas 2 to
3 feet. Isolated showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots early, increasing
to 15 to 20 knots. Seas 2 to 4 feet early, building to 4 to 6
feet. Isolated showers.
.WEDNESDAY...Northeast to east winds 15 to 20 knots. Seas 4 to 6
feet. Isolated showers.
.WEDNESDAY NIGHT AND THURSDAY...Northeast winds near 20 knots.
Seas 5 to 8 feet. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds near 25 knots. Seas
6 to 9 feet. Isolated showers.

$$

GMZ033-034-210330-
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-
424 PM EST Sat Jan 20 2018

.TONIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
.SUNDAY AND SUNDAY NIGHT...East winds near 15 knots. Seas 2 to 4
feet. Isolated showers.
.MONDAY AND MONDAY NIGHT...East to southeast winds 10 to 15
knots. Seas 1 to 3 feet. Isolated showers.
.TUESDAY...Northeast winds near 10 knots. Seas 1 to 2 feet.
Isolated showers.
.TUESDAY NIGHT...North to northeast winds 10 to 15 knots. Seas
1 to 3 feet. Isolated showers.
.WEDNESDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet.
Isolated showers.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots. Seas 3 to
5 feet. Isolated showers.
.THURSDAY...Northeast winds near 20 knots. Seas 4 to 6 feet.
Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas
4 to 7 feet. Isolated showers.

$$

Kasper



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