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Coastal Waters Forecast (CWF)

Issued by Key West, FL (KEY)

                            
000
FZUS52 KKEY 220231
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1031 PM EDT Sat Sep 21 2019

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.

GMZ005-220830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1031 PM EDT Sat Sep 21 2019

.SYNOPSIS...Strong northeast to east breezes will blow across
Florida Keys coastal waters overnight, as a sprawling high 
pressure cells maintains intensity and position from the western 
North Atlantic to the Gulf of Mexico. The high pressure cell will 
weaken very slowly, between Sunday night and Wednesday. 
Consequently, breezes will diminish slowly during this time.

The Approximate Shoreward Edge of the Gulf Stream as of
September 21, 2019...

55 NM South of Dry Tortugas Light...on Loggerhead Key.
33 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
27 NM South of Sand Key Light...off Key West.
21 NM South of Looe Key...off Big Pine Key.
18 NM South of Sombrero Key Light...off Marathon.
21 NM Southeast of Alligator Reef Light...off Islamorada.
20 NM Southeast of Molasses Reef Light...off Key Largo.
13 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

$$

GMZ031-220830-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1031 PM EDT Sat Sep 21 2019

...SMALL CRAFT ADVISORY IN EFFECT...

.OVERNIGHT...Northeast to east winds 25 to 30 knots. Bay waters
extremely rough. Numerous showers and isolated thunderstorms. 
.SUNDAY...Northeast to east winds 20 to 25 knots. Bay waters very
rough. Numerous showers and scattered thunderstorms. 
.SUNDAY NIGHT...Northeast to east winds 20 to 25 knots. Bay
waters very rough. Numerous showers and scattered thunderstorms. 
.MONDAY...Northeast winds near 20 knots. Bay waters rough. 
Scattered showers and isolated thunderstorms. 
.MONDAY NIGHT...Northeast winds 15 to 20 knots. Bay waters
choppy. Scattered showers and isolated thunderstorms. 
.TUESDAY...Northeast to east winds 15 knots. Bay waters a light to
moderate chop. Isolated showers. 
.TUESDAY NIGHT...East winds 10 to 15 knots. Bay waters a light to
moderate chop. Isolated showers. 
.WEDNESDAY AND WEDNESDAY NIGHT...East winds near 10 knots. Bay 
waters smooth to a light chop. Isolated showers. 
.THURSDAY...East winds 10 to 15 knots. Bay waters a light to
moderate chop. Isolated showers. 
.THURSDAY NIGHT...East winds 10 to 15 knots. Bay waters a light
to moderate chop. Isolated showers and thunderstorms. 

$$

GMZ032-035-220830-
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-
1031 PM EDT Sat Sep 21 2019

...SMALL CRAFT ADVISORY IN EFFECT...

.OVERNIGHT...Northeast to east winds 25 to 30 knots. Seas 2 to 5 
feet, except 6 to 8 feet west of the Marquesas Keys. Nearshore 
waters extremely rough. Numerous showers and isolated 
thunderstorms. 
.SUNDAY...Northeast to east winds near 25 knots. Seas 2 to
5 feet, except 5 to 7 feet west of the Marquesas Keys. Nearshore
waters extremely rough. Numerous showers and scattered
thunderstorms. 
.SUNDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 2 to
5 feet, except 5 to 6 feet west of the Marquesas Keys. Nearshore
waters very rough. Numerous showers and scattered thunderstorms. 
.MONDAY...Northeast to east winds near 20 knots. Seas 2 to 4 
feet. Nearshore waters rough. Scattered showers and isolated 
thunderstorms. 
.MONDAY NIGHT...Northeast winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy. Scattered showers and isolated 
thunderstorms. 
.TUESDAY...Northeast to east winds 15 knots. Seas 1 to 3 feet. 
Nearshore waters a moderate chop. Isolated showers.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet. 
Nearshore waters a light to moderate chop. Isolated showers.
.WEDNESDAY...Northeast to east winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Isolated showers.
.WEDNESDAY NIGHT...East winds near 10 knots. Seas 1 foot or less.
Nearshore waters a light chop. Isolated showers. 
.THURSDAY...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Isolated showers. 
.THURSDAY NIGHT...East winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop. Isolated showers and
thunderstorms. 

$$

GMZ042>044-220830-
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-
1031 PM EDT Sat Sep 21 2019

...SMALL CRAFT ADVISORY IN EFFECT...

.OVERNIGHT...Northeast to east winds 25 to 30 knots. Seas 4 to 7 
feet. Nearshore waters extremely rough. Showers and isolated 
thunderstorms. 
.SUNDAY...Northeast to east winds near 25 knots. Seas 3 to
6 feet. Nearshore waters extremely rough. Showers and scattered 
thunderstorms. 
.SUNDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 3 to
6 feet. Nearshore waters very rough. Numerous showers and
scattered thunderstorms. 
.MONDAY...Northeast to east winds near 20 knots. Seas 2 to 4 
feet. Nearshore waters choppy. Numerous showers and scattered 
thunderstorms. 
.MONDAY NIGHT...Northeast winds 15 to 20 knots. Seas 2 to 4 feet.
Nearshore waters choppy. Scattered showers and isolated
thunderstorms. 
.TUESDAY...Northeast to east winds 15 knots. Seas 2 to 3 feet. 
Nearshore waters a moderate chop. Isolated showers.
.TUESDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet. 
Nearshore waters a light to moderate chop. Isolated showers.
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers. 
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Isolated showers. 
.THURSDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers. 
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Isolated showers and
thunderstorms. 

$$

GMZ052>055-072>075-220830-
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-
1031 PM EDT Sat Sep 21 2019

...SMALL CRAFT ADVISORY IN EFFECT...

.OVERNIGHT...Northeast to east winds 25 to 30 knots, decreasing 
to 20 to 25 knots late. Seas 9 to 12 feet, subsiding to 8 to 11 
feet. Showers and isolated thunderstorms.
.SUNDAY...Northeast to east winds 20 to 25 knots. Seas 7 to
10 feet. Showers and scattered thunderstorms. 
.SUNDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 6 to
10 feet. Showers and scattered thunderstorms. 
.MONDAY...Northeast to east winds near 20 knots. Seas 5 to 8 
feet. Numerous showers and scattered thunderstorms. 
.MONDAY NIGHT...Northeast winds 15 to 20 knots. Seas 4 to 7 feet.
Scattered showers and isolated thunderstorms. 
.TUESDAY...Northeast to east winds near 15 knots. Seas 3 to 5 
feet. Isolated showers. 
.TUESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
2 to 4 feet. Isolated showers. 
.WEDNESDAY...Northeast to east winds 10 to 15 knots. Seas 2 to 3 
feet. Isolated showers. 
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers. 
.THURSDAY...Northeast to east winds 10 to 15 knots. Seas 2 to 3 
feet. Isolated showers. 
.THURSDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
2 to 4 feet. Isolated showers and thunderstorms. 

$$

GMZ033-034-220830-
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-
1031 PM EDT Sat Sep 21 2019

...SMALL CRAFT ADVISORY IN EFFECT...

.OVERNIGHT...Northeast to east winds 25 to 30 knots. Seas 6 to 10
feet. Scattered showers and isolated thunderstorms. 
.SUNDAY...Northeast to east winds near 25 knots. Seas 5 to
8 feet. Numerous showers and scattered thunderstorms. 
.SUNDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 4 to
7 feet. Numerous showers and scattered thunderstorms. 
.MONDAY...Northeast winds near 20 knots. Seas 3 to 6 feet 
subsiding to 2 to 4 feet in the afternoon. Scattered showers and 
isolated thunderstorms. 
.MONDAY NIGHT...Northeast to east winds 15 to 20 knots. Seas 2 to
4 feet. Scattered showers and isolated thunderstorms. 
.TUESDAY...Northeast winds 10 to 15 knots. Seas 1 to 3 feet.
Isolated showers. 
.TUESDAY NIGHT...Northeast winds near 10 knots, becoming east to
southeast. Seas 1 to 2 feet. Isolated showers.
.WEDNESDAY...East winds near 10 knots. Seas 1 to 2 feet. Isolated
showers. 
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet.
Isolated showers. 
.THURSDAY...East winds near 10 knots. Seas 1 to 2 feet. Isolated 
showers.
.THURSDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet.
Isolated showers and thunderstorms. 

$$

KBK/DAF