Coastal Waters Forecast
Issued by NWS Key West, FL

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FZUS52 KKEY 230817
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
417 AM EDT Wed Sep 23 2020

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.

GMZ005-231430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
417 AM EDT Wed Sep 23 2020

.SYNOPSIS...Fresh to strong easterly breezes will linger early
this morning, before moderate to occasional strong east breezes
prevail this afternoon. Moderate to occasionally fresh breezes
will peak and lull tonight and Thursday. Diminished southeasterly
breezes are likely Friday through Sunday as a weak trough moves
northwestward through the area.

The Approximate Shoreward Edge of the Gulf Stream as of
September 22, 2020...

 5 NM South of Dry Tortugas Light...on Loggerhead Key.
 8 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 4 NM South of Sand Key Light...off Key West.
 6 NM South of Looe Key...off Big Pine Key.
 6 NM South of Sombrero Key Light...off Marathon.
 1 NM Southeast of Alligator Reef Light...off Islamorada.
 2 NM Southeast of Molasses Reef Light...off Key Largo.
 1 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic
Office.

$$

GMZ031-231430-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
417 AM EDT Wed Sep 23 2020

...SMALL CRAFT SHOULD EXERCISE CAUTION...

.TODAY...Northeast to east winds 15 to 20 knots, decreasing to
near 15 knots. Bay waters choppy, becoming a moderate chop.
Isolated showers and thunderstorms.
.TONIGHT...East winds near 15 knots. Bay waters a moderate chop.
Isolated showers and thunderstorms.
.THURSDAY...East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southeast winds decreasing to near 10 knots.
Bay waters becoming a light chop. Scattered showers and
thunderstorms.
.FRIDAY...Southeast to south winds 5 to 10 knots. Bay waters
smooth to a light chop. Scattered showers and thunderstorms.
.FRIDAY NIGHT...Southeast to south winds 5 to 10 knots. Bay
waters smooth to a light chop. Scattered showers and isolated
thunderstorms.
.SATURDAY...Southeast to south winds near 5 knots. Bay waters
smooth. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...Southeast winds near 5 knots. Bay waters
smooth. Scattered showers and isolated thunderstorms.
.SUNDAY AND SUNDAY NIGHT...Variable winds near 5 knots. Bay
waters smooth. Scattered showers and isolated thunderstorms.

$$

GMZ032-035-231430-
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-
417 AM EDT Wed Sep 23 2020

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East winds near 20 knots early, decreasing to near 15
knots. Seas subsiding to 1 to 3 feet. Nearshore waters rough,
becoming a moderate chop. Isolated showers and thunderstorms.
.TONIGHT...East winds near 15 knots. Seas 1 to 3 feet. Nearshore
waters a moderate chop. Isolated showers and thunderstorms.
.THURSDAY...East to southeast winds near 15 knots. Seas 1 to
3 feet. Nearshore waters a moderate chop. Scattered showers and
thunderstorms.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Scattered
showers and thunderstorms.
.FRIDAY...Southeast to south winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. Scattered showers
and thunderstorms.
.FRIDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop.
Scattered showers and isolated thunderstorms.
.SATURDAY...Southeast to south winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.SATURDAY NIGHT...Southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.SUNDAY AND SUNDAY NIGHT...Variable winds near 5 knots. Seas 1
foot or less. Nearshore waters smooth. Scattered showers and
isolated thunderstorms.

$$

GMZ042>044-231430-
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-
417 AM EDT Wed Sep 23 2020

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East winds near 20 knots early, 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 and
thunderstorms.
.TONIGHT...East to southeast winds 15 to 20 knots. Seas 3 to 4
feet. Nearshore waters choppy. Isolated showers and
thunderstorms.
.THURSDAY...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop. Scattered
showers and thunderstorms.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
3 feet. Nearshore waters a light to moderate chop. Scattered
showers and thunderstorms.
.FRIDAY...Southeast to south winds 5 to 10 knots. Seas 1 to
2 feet. Nearshore waters smooth to a light chop. Scattered
showers and thunderstorms.
.FRIDAY NIGHT AND SATURDAY...Southeast to south winds 5 to 10
knots. Seas around 1 foot. Nearshore waters smooth to a light
chop. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...Southeast winds near 5 knots. Seas around
1 foot. Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.SUNDAY AND SUNDAY NIGHT...Variable winds near 5 knots. Seas
around 1 foot. Nearshore waters smooth. Scattered showers and
isolated thunderstorms.

$$

GMZ052-072-231430-
Straits of Florida from Ocean Reef to Craig Key out 20 NM-
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out-
417 AM EDT Wed Sep 23 2020

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East winds near 20 knots early, decreasing to near 15
knots. Seas 5 to 7 feet due to a north swell. Isolated showers
and thunderstorms.
.TONIGHT...East to southeast winds near 20 knots. Seas 5 to 7
feet due to a north swell. Isolated showers and thunderstorms.
.THURSDAY...East to southeast winds near 15 knots. Seas 3 to
6 feet due to a north swell. Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 3 to
5 feet in a northerly swell. Scattered showers and thunderstorms.
.FRIDAY...Southeast to south winds decreasing to 5 to 10 knots.
Seas subsiding to 2 to 3 feet. Scattered showers and
thunderstorms.
.FRIDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas 2 to
3 feet. Scattered showers and isolated thunderstorms.
.SATURDAY...Southeast to south winds 5 to 10 knots. Seas 1 to
2 feet. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...East to southeast winds near 5 knots. Seas 1 to
2 feet. Scattered showers and isolated thunderstorms.
.SUNDAY AND SUNDAY NIGHT...Variable winds near 5 knots. Seas 1 to
2 feet. Scattered showers and isolated thunderstorms.

$$

GMZ053>055-073>075-231430-
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 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-
417 AM EDT Wed Sep 23 2020

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East winds near 20 knots early, decreasing to 15 to 20 knots.
Seas 4 to 6 feet. Isolated showers and thunderstorms.
.TONIGHT...East to southeast winds near 20 knots. Seas 4 to 6
feet. Isolated showers and thunderstorms.
.THURSDAY...East to southeast winds near 15 knots. Seas 3 to
5 feet. Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
4 feet. Scattered showers and thunderstorms.
.FRIDAY...Southeast to south winds decreasing to 5 to 10 knots.
Seas subsiding to 1 to 2 feet. Scattered showers and
thunderstorms.
.FRIDAY NIGHT AND SATURDAY...Southeast to south winds 5 to 10
knots. Seas 1 to 2 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY NIGHT...Southeast winds near 5 knots. Seas around
1 foot. Scattered showers and isolated thunderstorms.
.SUNDAY AND SUNDAY NIGHT...Variable winds near 5 knots. Seas
around 1 foot. Scattered showers and isolated thunderstorms.

$$

GMZ033-034-231430-
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-
417 AM EDT Wed Sep 23 2020

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East winds near 20 knots early, decreasing to near 15
knots. Seas 3 to 6 feet, subsiding to 3 to 5 feet. Isolated
showers and thunderstorms.
.TONIGHT...East to southeast winds 15 to 20 knots. Seas 3 to
5 feet. Isolated showers and thunderstorms.
.THURSDAY...East to southeast winds near 15 knots. Seas 3 to 5
feet. Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to
3 feet. Scattered showers and thunderstorms.
.FRIDAY...South winds decreasing to 5 to 10 knots. Seas 1 to 2
feet. Scattered showers and thunderstorms.
.FRIDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas 1 to
2 feet. Scattered showers and isolated thunderstorms.
.SATURDAY AND SATURDAY NIGHT...Southeast to south winds near 5
knots. Seas around 1 foot. Scattered showers and isolated
thunderstorms.
.SUNDAY AND SUNDAY NIGHT...Variable winds near 5 knots. Seas
around 1 foot. Scattered showers and isolated thunderstorms.

$$


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