Coastal Waters Forecast
Issued by NWS Key West, FL

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965
FZUS52 KKEY 200822
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
422 AM EDT Thu Jun 20 2024

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.

Wave Detail will include details about the period and direction
of origin for the highest energy waves. Long-period swells coming
from a different direction than the wind would be included in the
Wave Detail.

GMZ005-201500-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
422 AM EDT Thu Jun 20 2024

.SYNOPSIS...Strong high pressure centered north of Bermuda
working in tandem with Tropical Storm Alberto near the Bay of
Campeche will result in moderate to fresh breezes today and this
evening. A second, weak area of low pressure currently north of
the Lesser Antilles will move west northwest reaching the
southeast U.S by late this evening or overnight. This, along with
weakening Alberto over Mexico, will loosen the pressure gradient,
leading to slackening east to southeast breezes for Friday through
the first part of next week.

The Approximate Shoreward Edge of the Gulf Stream as of June 19...

67 NM South of Dry Tortugas Light...on Loggerhead Key.
35 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
28 NM South of Sand Key Light...off Key West.
29 NM South of Looe Key...off Big Pine Key.
34 NM South of Sombrero Key Light...off Marathon.
23 NM Southeast of Alligator Reef Light...off Islamorada.
19 NM Southeast of Molasses Reef Light...off Key Largo.

Gulf Stream Information Courtesy of the National Weather Service in
Key West.

$$

GMZ031-201500-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
422 AM EDT Thu Jun 20 2024

...SMALL CRAFT ADVISORY IN EFFECT...

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

$$

GMZ032-035-201500-
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-
422 AM EDT Thu Jun 20 2024

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East winds near 20 knots. Seas 2 to 3 feet, except 4 to
5 feet, occasionally to 6 feet west of the Marquesas Keys.
Nearshore waters rough. Scattered showers and isolated
thunderstorms.
.TONIGHT...East winds 15 to 20 knots. Seas 2 to 3 feet, except
3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys.
Nearshore waters choppy. Scattered showers and isolated
thunderstorms.
.FRIDAY...East winds 15 to 20 knots. Seas 2 to 3 feet, except
3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys.
Nearshore waters choppy. Scattered showers and isolated
thunderstorms.
.FRIDAY NIGHT...East to southeast winds 15 to 20 knots, decreasing
to near 15 knots. Seas 1 to 3 feet, except 3 to 4 feet,
occasionally to 5 feet west of the Marquesas Keys. Nearshore
waters choppy, becoming a moderate chop. Scattered showers and
isolated thunderstorms.
.SATURDAY...East to southeast winds near 15 knots. Seas 1 to
2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a moderate chop. Scattered showers and isolated
thunderstorms.
.SATURDAY NIGHT...East to southeast winds decreasing to 10 to 15
knots. Seas 1 to 2 feet. West of the Marquesas Keys, seas 2 to 3
feet, subsiding to around 2 feet Nearshore waters becoming a light
to moderate chop. Scattered showers and isolated thunderstorms.
.SUNDAY...East to southeast winds 10 to 15 knots. Seas 1 to 2
feet. Nearshore waters a light to moderate chop. Scattered
showers and isolated thunderstorms.
.SUNDAY NIGHT...East to southeast winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.MONDAY...East to southeast winds decreasing to 5 to 10 knots.
Seas around 1 foot. Nearshore waters becoming smooth to a light
chop. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. Isolated showers
and thunderstorms.

$$

GMZ042>044-201500-
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-
422 AM EDT Thu Jun 20 2024

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East winds near 20 knots. Seas 3 to 5 feet, occasionally
to 6 feet. Nearshore waters rough. Scattered showers and isolated
thunderstorms.
.TONIGHT...East winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy. Scattered
showers and isolated thunderstorms.
.FRIDAY...East winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters choppy. Scattered
showers and isolated thunderstorms.
.FRIDAY NIGHT...East to southeast winds 15 to 20 knots, decreasing
to near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet.
Nearshore waters choppy, becoming a moderate chop. Scattered
showers and isolated thunderstorms.
.SATURDAY...East to southeast winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop. Scattered showers and
isolated thunderstorms.
.SATURDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
2 to 3 feet. Nearshore waters a light to moderate chop. Scattered
showers and isolated thunderstorms.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Nearshore
waters a light to moderate chop. Scattered showers and isolated
thunderstorms.
.SUNDAY NIGHT...East winds near 10 knots. Seas subsiding to 1 to 2
feet. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.MONDAY...East to southeast winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. Isolated showers
and thunderstorms.

$$

GMZ052>055-072>075-201500-
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-
422 AM EDT Thu Jun 20 2024

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East winds near 20 knots. Seas 5 to 7 feet, occasionally
to 8 feet. Wave Detail: East 6 feet at 6 seconds. Scattered
showers and isolated thunderstorms.
.TONIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 7 feet. Wave Detail: Northeast to east 5 feet at
6 seconds. Scattered showers and isolated thunderstorms.
.FRIDAY...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 6 seconds.
Scattered showers and isolated thunderstorms.
.FRIDAY NIGHT...East to southeast winds 15 to 20 knots, decreasing
to near 15 knots. Seas 3 to 5 feet, occasionally to 6 feet.
Scattered showers and isolated thunderstorms.
.SATURDAY...East to southeast winds near 15 knots. Seas 3 to 4
feet, occasionally to 5 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY NIGHT...East to southeast winds near 15 knots,
decreasing to 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5
feet. Scattered showers and isolated thunderstorms.
.SUNDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Scattered
showers and isolated thunderstorms.
.SUNDAY NIGHT...East to southeast winds near 10 knots. Seas
2 to 3 feet, subsiding to around 2 foot. Scattered showers and
isolated thunderstorms.
.MONDAY...East winds near 10 knots. Seas 1 to 2 feet. Scattered
showers and isolated thunderstorms.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
1 foot. Isolated showers and thunderstorms.

$$

GMZ033-034-201500-
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-
422 AM EDT Thu Jun 20 2024

...SMALL CRAFT ADVISORY IN EFFECT...

.TODAY...East winds near 20 knots. Seas 3 to 5 feet, occasionally
to 6 feet. Wave Detail: East 4 feet at 5 seconds. Scattered
showers and isolated thunderstorms.
.TONIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Wave Detail: East 4 feet at 5 seconds.
Scattered showers and isolated thunderstorms.
.FRIDAY...East winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Wave Detail: East 3 feet at 5 seconds.
Scattered showers and isolated thunderstorms.
.FRIDAY NIGHT...East to southeast winds 15 to 20 knots, decreasing
to near 15 knots. Seas 2 to 4 feet, occasionally to 5 feet.
Scattered showers and isolated thunderstorms.
.SATURDAY...East to southeast winds near 15 knots. Seas 2 to
3 feet. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...East to southeast decreasing to 10 to 15 knots.
Seas subsiding to around 2 feet. Scattered showers and isolated
thunderstorms.
.SUNDAY...East to southeast winds 10 to 15 knots. Seas around 2
feet. Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...East to southeast winds near 10 knots. Seas
1 to 2 feet. Scattered showers and isolated thunderstorms.
.MONDAY...East to southeast winds decreasing to 5 to 10 knots.
Seas subsiding to around 1 foot. Scattered showers and isolated
thunderstorms.
.MONDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less. Scattered showers and isolated thunderstorms.

$$