209
FZUS52 KKEY 202034
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
434 PM EDT Sat Jul 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.

GMZ005-210245-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
434 PM EDT Sat Jul 20 2024

.SYNOPSIS...Atlantic ridging will remain across the Florida
Peninsula through the remainder of the weekend, with gentle to
moderate east to southeast breezes continuing across the Keys
coastal waters. A tropical wave is forecast to move through the
area Sunday night and Monday, bringing an increase in rain and
thunder chances. Gentle to moderate east to southeast breezes will
resume behind the wave through the middle of next week, as the
Atlantic ridge remains in place.

The Approximate Shoreward Edge of the Gulf Stream as of July 18...

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

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

$$

GMZ031-210245-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
434 PM EDT Sat Jul 20 2024

.TONIGHT...East to southeast winds 10 to 15 knots, becoming east
and increasing to near 15 knots. Bay waters a light to moderate
chop, becoming a moderate chop. Isolated showers and
thunderstorms.
.SUNDAY...East winds near 15 knots. Bay waters a moderate chop.
Isolated showers and thunderstorms in the morning, then numerous
showers and scattered thunderstorms in the afternoon.
.SUNDAY NIGHT...East winds near 15 knots, becoming southeast and
decreasing to near 10 knots after midnight. Bay waters a moderate
chop, becoming a light chop. Numerous showers and scattered
thunderstorms.
.MONDAY...Southeast winds near 10 knots. Bay waters a light chop.
Numerous showers and scattered thunderstorms in the morning, then
scattered showers and isolated thunderstorms in the afternoon.
.MONDAY NIGHT...East to southeast winds near 10 knots, increasing
to 10 to 15 knots. Bay waters a light chop, becoming a light to
moderate chop. Scattered showers and isolated thunderstorms.
.TUESDAY...East to southeast winds near 15 knots. Bay waters a
moderate chop. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East winds near 15 knots, becoming east to
southeast. Bay waters a moderate chop. Scattered showers and
isolated thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...East to southeast winds near 15
knots. Bay waters a moderate chop. Scattered showers and isolated
thunderstorms.
.THURSDAY AND THURSDAY NIGHT...East to southeast winds near 15
knots. Bay waters a moderate chop. Scattered showers and
thunderstorms.

$$

GMZ032-035-210245-
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-
434 PM EDT Sat Jul 20 2024

.TONIGHT...East to southeast winds 10 to 15 knots, becoming east
and increasing to near 15 knots. Seas 1 to 2 feet, except
building to 2 to 3 feet west of the Marquesas Keys. Nearshore
waters a light to moderate chop, becoming a moderate chop.
Isolated showers and thunderstorms.
.SUNDAY...East winds near 15 knots. Seas 1 to 2 feet, except 2 to
3 feet west of the Marquesas Keys. Nearshore waters a moderate
chop. Isolated showers and thunderstorms in the morning, then
numerous showers and scattered thunderstorms in the afternoon.
.SUNDAY NIGHT...East to southeast winds near 15 knots, becoming
southeast and decreasing to 10 to 15 knots after midnight. Seas 1
to 2 feet, except 2 to 3 feet west of the Marquesas Keys.
Nearshore waters a moderate chop, becoming a light to moderate
chop. Numerous showers and scattered thunderstorms.
.MONDAY...Southeast winds near 10 knots. Seas around 1 foot,
except 1 to 2 feet west of the Marquesas Keys. Nearshore waters a
light chop. Numerous showers and scattered thunderstorms in the
morning, then scattered showers and isolated thunderstorms in the
afternoon.
.MONDAY NIGHT...East to southeast winds near 10 knots, increasing
to 10 to 15 knots. Seas around 1 foot, except 1 to 2 feet west of
the Marquesas Keys. Nearshore waters a light chop, becoming a
light to moderate chop. Scattered showers and isolated
thunderstorms.
.TUESDAY...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.
.TUESDAY NIGHT...East winds near 15 knots, becoming east to
southeast. 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.
.WEDNESDAY AND WEDNESDAY NIGHT...East to southeast winds near 15
knots. Seas 1 to 2 feet, except around 3 feet west of the
Marquesas Keys. Nearshore waters a moderate chop. Scattered
showers and isolated thunderstorms.
.THURSDAY AND THURSDAY NIGHT...East to southeast winds near 15
knots. Seas 1 to 2 feet, except around 3 feet west of the
Marquesas Keys. Nearshore waters a moderate chop. Scattered
showers and thunderstorms.

$$

GMZ042>044-210245-
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-
434 PM EDT Sat Jul 20 2024

...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...

.TONIGHT...East to southeast winds 10 to 15 knots, becoming east
and increasing to 15 to 20 knots. Seas around 2 feet, building to
around 3 feet. Nearshore waters a light to moderate chop,
becoming choppy. Isolated showers and thunderstorms.
.SUNDAY...East winds near 15 knots. Seas around 3 feet. Nearshore
waters a moderate chop. Isolated showers and thunderstorms in the
morning, then scattered showers and thunderstorms in the
afternoon.
.SUNDAY NIGHT...East to southeast winds 15 to 20 knots, becoming
southeast and decreasing to 10 to 15 knots. Seas around 3 feet,
subsiding to 2 to 3 feet. Nearshore waters choppy, becoming a
light to moderate chop. Numerous showers and scattered
thunderstorms.
.MONDAY...Southeast winds near 10 knots. Seas 1 to 3 feet,
subsiding to 1 to 2 feet. Nearshore waters a light chop.
Scattered showers and thunderstorms in the morning, then scattered
showers and isolated thunderstorms in the afternoon.
.MONDAY NIGHT...East to southeast winds near 10 knots, increasing
to near 15 knots. Seas 1 to 2 feet, building to 1 to 3 feet.
Nearshore waters a light chop, becoming a moderate chop. Scattered
showers and isolated thunderstorms.
.TUESDAY...East to southeast winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop. Scattered showers and
isolated thunderstorms.
.TUESDAY NIGHT...East winds near 15 knots, becoming east to
southeast. Seas around 3 feet. Nearshore waters a moderate chop.
Scattered showers and isolated thunderstorms.
.WEDNESDAY...East to southeast winds near 15 knots, becoming east.
Seas around 3 feet. Nearshore waters a moderate chop. Scattered
showers and isolated thunderstorms.
.WEDNESDAY NIGHT...East winds 15 to 20 knots, becoming east to
southeast. Seas 3 to 4 feet, occasionally to 5 feet. Nearshore
waters choppy. Scattered showers and isolated thunderstorms.
.THURSDAY AND THURSDAY NIGHT...East to southeast winds near 15
knots. Seas around 3 feet. Nearshore waters a moderate chop.
Scattered showers and thunderstorms.

$$

GMZ052>055-072>075-210245-
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-
434 PM EDT Sat Jul 20 2024

...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...

.TONIGHT...East to southeast winds near 15 knots, becoming east
and increasing to 15 to 20 knots. Seas 3 to 4 feet, occasionally
to 5 feet, building to 4 to 5 feet, occasionally to 6 feet. Wave
Detail: East 4 feet at 5 seconds. Scattered showers and isolated
thunderstorms.
.SUNDAY...East winds 15 to 20 knots, becoming east to southeast
and decreasing to near 15 knots. Seas 4 to 5 feet, occasionally
to 6 feet, subsiding to 3 to 4 feet, occasionally to 5 feet. Wave
Detail: East 3 feet at 5 seconds. Isolated showers and
thunderstorms in the morning, then numerous showers and scattered
thunderstorms in the afternoon.
.SUNDAY NIGHT...East to southeast winds 15 to 20 knots, becoming
southeast and decreasing to 10 to 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet, subsiding to 2 to 3 feet. Wave Detail:
East 3 feet at 5 seconds. Numerous showers and scattered
thunderstorms.
.MONDAY...East to southeast winds 10 to 15 knots. Seas around 2
feet. Scattered showers and thunderstorms in the morning, then
scattered showers and isolated thunderstorms in the afternoon.
.MONDAY NIGHT...East to southeast winds 10 to 15 knots, increasing
to near 15 knots. Seas 2 to 3 feet, building to 2 to 4 feet,
occasionally to 5 feet. Scattered showers and isolated
thunderstorms.
.TUESDAY...East to southeast winds near 15 knots, becoming east.
Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers and
isolated thunderstorms.
.TUESDAY NIGHT AND WEDNESDAY...East winds 15 to 20 knots. Seas 3
to 5 feet, occasionally to 6 feet. Scattered showers and isolated
thunderstorms.
.WEDNESDAY NIGHT...East winds 15 to 20 knots, becoming east to
southeast. Seas 3 to 5 feet, occasionally to 6 feet. Scattered
showers and isolated thunderstorms.
.THURSDAY AND THURSDAY NIGHT...East to southeast winds 15 to 20
knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers
and thunderstorms.

$$

GMZ033-034-210245-
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-
434 PM EDT Sat Jul 20 2024

.TONIGHT...East to southeast winds 10 to 15 knots, becoming east
and increasing to near 15 knots. Seas 1 to 3 feet, building to 2
to 3 feet. Wave Detail: East to southeast 2 feet at 3 seconds.
Isolated showers and thunderstorms.
.SUNDAY...East winds near 15 knots. Seas 2 to 3 feet. Wave
Detail: East 2 feet at 4 seconds. Isolated showers and
thunderstorms in the morning, then scattered showers and
thunderstorms in the afternoon.
.SUNDAY NIGHT...East winds 15 to 20 knots, becoming southeast and
decreasing to 10 to 15 knots. Seas 2 to 4 feet, subsiding to 1 to
3 feet. Wave Detail: East to southeast 2 feet at 4 seconds.
Numerous showers and scattered thunderstorms.
.MONDAY...Southeast to south winds near 10 knots. Seas 1 to 2
feet. Numerous showers and scattered thunderstorms in the
morning, then scattered showers and isolated thunderstorms in the
afternoon.
.MONDAY NIGHT...Southeast winds near 10 knots, becoming east to
southeast and increasing to 10 to 15 knots. Seas 1 to 2 feet,
building to 2 to 3 feet. Scattered showers and isolated
thunderstorms.
.TUESDAY...East to southeast winds 10 to 15 knots. Seas 2 to 3
feet. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East to southeast winds 10 to 15 knots,
increasing to near 15 knots. Seas 2 to 3 feet, building to 2 to 3
feet, occasionally to 5 feet. Scattered showers and isolated
thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...East to southeast winds near 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered
showers and isolated thunderstorms.
.THURSDAY AND THURSDAY NIGHT...East to southeast winds near 15
knots. Seas 2 to 4 feet, occasionally to 5 feet. Scattered
showers and thunderstorms.

$$

MJV