217
FZUS52 KKEY 182028
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
428 PM EDT Thu Jul 18 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.

GMZ005-190230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
428 PM EDT Thu Jul 18 2024

.SYNOPSIS...Atlantic ridging will remain across the Florida
Peninsula through the forecast. This will result in gentle to
moderate east to southeasterly breezes across Keys waters, peaking
in the evening and night hours and lulling during the day. Winds
are expected to trend upwards this weekend as the ridge lifts
northward into North Florida and the southeastern United States.
This will also lead to an increase in rain and thunder chances.

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.

$$

GMZ031-190230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
428 PM EDT Thu Jul 18 2024

.TONIGHT...East to southeast winds 5 to 10 knots, increasing to
near 10 knots. Bay waters smooth to a light chop, becoming a light
chop. Isolated showers and thunderstorms.
.FRIDAY...East to southeast winds near 10 knots. Bay waters a
light chop. Scattered showers and isolated thunderstorms.
.FRIDAY NIGHT...East to southeast winds 10 to 15 knots. Bay
waters a light to moderate chop. Scattered showers and isolated
thunderstorms.
.SATURDAY...East to southeast winds near 15 knots, decreasing to
10 to 15 knots. Bay waters a moderate chop, becoming a light to
moderate chop. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...East winds increasing to near 15 knots. Bay
waters becoming a moderate chop. Scattered showers and isolated
thunderstorms.
.SUNDAY...East winds near 15 knots. Bay waters a moderate chop.
Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...East to southeast winds 10 to 15 knots, decreasing
to near 10 knots. Bay waters a light to moderate chop, becoming a
light chop. Scattered showers and thunderstorms.
.MONDAY...Southeast winds increasing to 10 to 15 knots. Bay
waters becoming a light to moderate chop. Scattered showers and
thunderstorms.
.MONDAY NIGHT...East to southeast winds 10 to 15 knots. Bay
waters a light to moderate chop. Scattered showers and isolated
thunderstorms.
.TUESDAY AND TUESDAY NIGHT...East to southeast winds near 15
knots. Bay waters a moderate chop. Scattered showers and isolated
thunderstorms.

$$

GMZ032-035-190230-
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-
428 PM EDT Thu Jul 18 2024

.TONIGHT...East to southeast winds 5 to 10 knots, increasing to
10 to 15 knots. Seas around 1 foot, except building to 1 to 2 feet
west of the Marquesas Keys. Nearshore waters smooth to a light
chop, becoming a light to moderate chop. Isolated showers and
thunderstorms.
.FRIDAY...Southeast winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Isolated showers and thunderstorms.
.FRIDAY NIGHT...East to southeast winds increasing to near 15
knots. Seas building to 1 to 2 feet. Nearshore waters becoming a
moderate chop. Scattered showers and isolated thunderstorms.
.SATURDAY THROUGH SUNDAY...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.
.SUNDAY NIGHT...East to southeast winds decreasing to 10 to 15
knots. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas
Keys. Nearshore waters becoming a light to moderate chop.
Scattered showers and thunderstorms.
.MONDAY...Southeast winds near 10 knots, increasing to 10 to 15
knots. Seas 1 to 2 feet. Nearshore waters a light chop, becoming
a light to moderate chop. Scattered showers and thunderstorms.
.MONDAY NIGHT THROUGH TUESDAY NIGHT...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.

$$

GMZ042>044-190230-
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-
428 PM EDT Thu Jul 18 2024

.TONIGHT...East to southeast winds 5 to 10 knots, increasing to
10 to 15 knots. Seas 1 to 2 feet. Nearshore waters smooth to a
light chop, becoming a light to moderate chop. Isolated showers
and thunderstorms.
.FRIDAY...East to southeast winds decreasing to near 10 knots.
Seas 1 to 2 feet. Nearshore waters a light chop. Isolated showers
and thunderstorms.
.FRIDAY NIGHT...East to southeast winds increasing to near 15
knots. Seas building to 2 to 3 feet. Nearshore waters becoming a
moderate chop. Scattered showers and isolated thunderstorms.
.SATURDAY...East to southeast winds near 15 knots, decreasing to
10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate
chop, becoming a light to moderate chop. Scattered showers and
isolated thunderstorms.
.SATURDAY NIGHT...East winds increasing to near 15 knots. Seas
building to 2 to 4 feet, occasionally to 5 feet. Nearshore waters
becoming a moderate chop. Scattered showers and isolated
thunderstorms.
.SUNDAY...East winds near 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Nearshore waters a moderate chop.
Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...East to southeast winds decreasing to 10 to 15
knots. Seas subsiding to 2 to 3 feet. Nearshore waters becoming a
light to moderate chop. Numerous showers and scattered
thunderstorms.
.MONDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Scattered showers and
thunderstorms.
.MONDAY NIGHT...East to southeast winds increasing to near 15
knots. Seas 2 to 3 feet. Nearshore waters becoming a moderate
chop. Scattered showers and isolated thunderstorms.
.TUESDAY AND TUESDAY NIGHT...East to southeast winds near 15
knots. Seas 2 to 4 feet. Nearshore waters a moderate chop.
Scattered showers and isolated thunderstorms.

$$

GMZ052>055-072>075-190230-
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-
428 PM EDT Thu Jul 18 2024

.TONIGHT...East to southeast winds near 10 knots, increasing to
10 to 15 knots. Seas around 2 feet, building to 2 to 3 feet. Wave
Detail:
East 2 feet at 4 seconds. Isolated showers and thunderstorms.
.FRIDAY...East to southeast winds near 10 knots. Seas around 2
feet. Wave Detail: East 2 feet at 4 seconds. Isolated showers and
thunderstorms.
.FRIDAY NIGHT...East to southeast winds increasing to near 15
knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 5 seconds.
Isolated showers and 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 winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Scattered showers and isolated
thunderstorms.
.SUNDAY...East winds decreasing to near 15 knots. Seas 3 to 5
feet, occasionally to 6 feet. Scattered showers and isolated
thunderstorms.
.SUNDAY NIGHT...East to southeast winds decreasing to 10 to 15
knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers
and thunderstorms.
.MONDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Scattered showers and thunderstorms.
.MONDAY NIGHT...East to southeast winds near 15 knots. Seas 3 to
4 feet, occasionally to 5 feet. Scattered showers and isolated
thunderstorms.
.TUESDAY...East winds near 15 knots. Seas 3 to 4 feet,
occasionally to 5 feet. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. Scattered showers and isolated
thunderstorms.

$$

GMZ033-034-190230-
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-
428 PM EDT Thu Jul 18 2024

.TONIGHT...East to southeast winds 5 to 10 knots, increasing to
10 to 15 knots. Seas building to 1 to 2 feet. Wave Detail:
Southeast 2 feet at 4 seconds. Isolated showers and thunderstorms.
.FRIDAY...Southeast winds near 10 knots. Seas 1 to 2 feet. Wave
Detail: Southeast 2 feet at 4 seconds. Isolated showers and
thunderstorms.
.FRIDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
building to around 2 feet. Wave Detail: East to southeast 2 feet
at 4 seconds. Isolated showers and thunderstorms.
.SATURDAY...East to southeast winds near 15 knots, decreasing to
10 to 15 knots. Seas 2 to 3 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY NIGHT...East winds increasing to near 15 knots. Seas
building to 2 to 4 feet. Scattered showers and isolated
thunderstorms.
.SUNDAY...East winds near 15 knots. Seas subsiding to 2 to 3
feet. Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...East to southeast winds decreasing to 10 to 15
knots. Seas 2 to 3 feet. Numerous showers and scattered
thunderstorms.
.MONDAY...Southeast to south winds near 10 knots. Seas 1 to
2 feet. Scattered showers and thunderstorms.
.MONDAY NIGHT...Southeast winds increasing to near 15 knots. Seas
building to around 2 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 winds near 15 knots. Seas 2 to 3 feet.
Scattered showers and isolated thunderstorms.

$$