Preview of NWS' New Version of Forecast
This preview is not operational and should not be used for support decisions.

Coastal Waters Forecast (CWF)

Issued by Key West, FL (KEY)

                            
000
FZUS52 KKEY 231708
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
108 PM EDT Mon Sep 23 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.

GMZ005-232100-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
108 PM EDT Mon Sep 23 2019

.SYNOPSIS...Strong northeast to east breezes across the Florida 
Keys this morning will gradually diminish this afternoon and
tonight, then drop off more quickly on Tuesday, as high pressure
over the Southeast United States weakens and shifts westward into
the Lower Mississippi Valley. Gentle to moderate easterly breezes
will prevail from Tuesday night through Friday night, as weak 
high pressure remains stationary over the Florida peninsula.

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

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.

$$

GMZ031-232100-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
108 PM EDT Mon Sep 23 2019

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.THIS AFTERNOON...Northeast winds 15 to 20 knots. Bay waters 
choppy. Isolated showers.
.TONIGHT...Northeast winds near 20 knots in the evening,
decreasing to near 15 knots after midnight. Bay waters rough,
becoming a moderate chop. Isolated showers in the evening. 
.TUESDAY AND TUESDAY NIGHT...Northeast to east winds near 10 
knots. Bay waters a light chop. 
.WEDNESDAY...Northeast to east winds 5 to 10 knots. Bay waters
smooth to a light chop. 
.WEDNESDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers. 
.THURSDAY...East winds near 10 knots. Bay waters a light chop. 
Isolated showers. 
.THURSDAY NIGHT...East winds near 15 knots. Bay waters a moderate 
chop. Scattered showers and isolated thunderstorms.
.FRIDAY...East winds 10 to 15 knots. Bay waters a light to 
moderate chop. Scattered showers and isolated thunderstorms.
.FRIDAY NIGHT...East winds near 15 knots. Bay waters a moderate 
chop. Scattered showers and isolated thunderstorms.

$$

GMZ032-035-232100-
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-
108 PM EDT Mon Sep 23 2019

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.THIS AFTERNOON...Northeast winds 15 to 20 knots. Seas 2 to 3 
feet, subsiding to 1 to 3 feet. Nearshore waters choppy. Isolated 
showers.
.TONIGHT...Northeast winds near 20 knots in the evening,
decreasing to near 15 knots after midnight. Seas 1 to 3 feet. 
Nearshore waters rough, becoming a moderate chop. Isolated 
showers in the evening.
.TUESDAY...Northeast winds near 10 knots. Seas 1 to 2 feet. 
Nearshore waters a light chop. 
.TUESDAY NIGHT...Northeast to east winds near 10 knots. Seas
around 1 foot. Nearshore waters a light chop.
.WEDNESDAY...Northeast to east winds 5 to 10 knots. Seas 1 foot
or less. Nearshore waters smooth to a light chop. 
.WEDNESDAY NIGHT AND THURSDAY...East winds near 10 knots. Seas 
around 1 foot. Nearshore waters a light chop. Isolated showers.
.THURSDAY NIGHT...East winds near 15 knots. Seas 1 to 3 feet. 
Nearshore waters a moderate chop. Scattered showers and isolated 
thunderstorms.
.FRIDAY...East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore 
waters a light to moderate chop. Scattered showers and isolated 
thunderstorms.
.FRIDAY NIGHT...East winds near 15 knots. Seas 1 to 3 feet. 
Nearshore waters a moderate chop. Scattered showers and isolated 
thunderstorms.

$$

GMZ042>044-232100-
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-
108 PM EDT Mon Sep 23 2019

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northeast winds near 20 knots. Seas 2 to 4 
feet. Nearshore waters rough. Isolated showers. 
.TONIGHT...Northeast winds near 20 knots in the evening, 
decreasing to near 15 knots. Seas 2 to 4 feet, subsiding to 2 to 
3 feet. Nearshore waters rough, becoming a moderate chop. 
Isolated showers in the evening. 
.TUESDAY...Northeast winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. 
.TUESDAY NIGHT...Northeast to east winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. 
.WEDNESDAY...Northeast to east winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. 
.WEDNESDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet. 
Nearshore waters a light to moderate chop. Isolated showers. 
.THURSDAY...East winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop. Isolated showers. 
.THURSDAY NIGHT...East winds near 15 knots. Seas 2 to 3 feet. 
Nearshore waters a moderate chop. Scattered showers and isolated 
thunderstorms. 
.FRIDAY...East winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore
waters a light to moderate chop. Scattered showers and isolated
thunderstorms. 
.FRIDAY NIGHT...East winds near 15 knots. Seas 2 to 3 feet. 
Nearshore waters a moderate chop. Scattered showers and isolated 
thunderstorms. 

$$

GMZ052>055-072>075-232100-
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-
108 PM EDT Mon Sep 23 2019

...SMALL CRAFT ADVISORY IN EFFECT...

.THIS AFTERNOON...Northeast winds near 20 knots. Seas 5 to 8 
feet, subsiding to 4 to 7 feet. Scattered showers.
.TONIGHT...Northeast to east winds near 20 knots in the evening,  
decreasing to 15 to 20 knots after midnight. Seas 4 to 7 feet. 
Isolated showers.
.TUESDAY...Northeast winds near 15 knots, decreasing to 10 to 15 
knots. Seas 3 to 5 feet, subsiding to 2 to 4 feet. Isolated 
showers.
.TUESDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 2 
to 4 feet. Isolated showers. 
.WEDNESDAY...Northeast winds near 10 knots. Seas 1 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 near 10 knots. Seas 1 to 3 
feet. Isolated showers. 
.THURSDAY NIGHT...East winds near 15 knots. Seas 3 to 4 feet. 
Scattered showers and isolated thunderstorms. 
.FRIDAY...East winds 10 to 15 knots. Seas 2 to 4 feet. Scattered 
showers and isolated thunderstorms. 
.FRIDAY NIGHT...East winds near 15 knots. Seas 3 to 5 feet. 
Scattered showers and isolated thunderstorms. 

$$

GMZ033-034-232100-
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-
108 PM EDT Mon Sep 23 2019

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.THIS AFTERNOON...Northeast winds 15 to 20 knots. Seas 4 to 6 
feet, subsiding to 3 to 5 feet. Isolated showers.
.TONIGHT...Northeast to east winds near 15 knots. Seas 3 to 4 
feet. 
.TUESDAY...Northeast winds 10 to 15 knots, becoming north to 
northeast and decreasing to near 10 knots. Seas 2 to 3 feet,
subsiding to 1 to 3 feet.
.TUESDAY NIGHT...North to northeast winds near 10 knots, becoming
east. Seas 1 to 2 feet.
.WEDNESDAY...Northeast winds 5 to 10 knots. Seas around 1 foot.
.WEDNESDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet. 
Isolated showers. 
.THURSDAY...Northeast to 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. 
Scattered showers and isolated thunderstorms. 
.FRIDAY...East winds near 10 knots. Seas 1 to 2 feet. Scattered
showers and isolated thunderstorms. 
.FRIDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet. 
Scattered showers and isolated thunderstorms. 

$$

CLR