363
FZUS52 KKEY 212028
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
428 PM EDT Sat Sep 21 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.

GMZ005-220230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
428 PM EDT Sat Sep 21 2024

.SYNOPSIS...As a trough continues to slide eastward across the
western North Atlantic through the rest of the weekend and into
early next week, high pressure building along the Eastern Seaboard
will bring gradually increasing easterly breezes to the Keys
coastal waters beginning on Monday. Heading into the middle of
next week, the forecast will depend on the potential development
and movement of low pressure over the northwestern Caribbean Sea.
At this time, we expect freshening east to southeast breezes, with
the strongest winds over western sections of the Keys waters.

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

63 NM South of Dry Tortugas Light...on Loggerhead Key.
23 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 8 NM South of Sand Key Light...off Key West.
12 NM South of Looe Key...off Big Pine Key.
13 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.
 5 NM East of Carysfort Reef Light...off Ocean Reef.

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

$$

GMZ031-220230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
428 PM EDT Sat Sep 21 2024

.TONIGHT...Northeast to east winds near 5 knots. Bay waters
smooth. Isolated showers and thunderstorms.
.SUNDAY...Northeast to east winds near 5 knots. Bay waters
smooth. Isolated showers and thunderstorms.
.SUNDAY NIGHT...East winds near 5 knots, increasing to 5 to 10
knots. Bay waters smooth, becoming smooth to a light chop.
Scattered showers and isolated thunderstorms.
.MONDAY...Northeast to east winds 5 to 10 knots, increasing to
near 10 knots. Bay waters smooth to a light chop, becoming a
light chop. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East winds increasing to 10 to 15 knots. Bay
waters becoming a light to moderate chop. Scattered showers and
isolated thunderstorms.
.TUESDAY...East winds 10 to 15 knots, increasing to near 15 knots.
Bay waters a light to moderate chop, becoming a moderate chop.
Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...East to southeast winds near 15 knots. Bay
waters a moderate chop. Scattered showers and thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...East to southeast winds 15 to 20
knots. Bay waters choppy. Scattered showers and thunderstorms.
.THURSDAY AND THURSDAY NIGHT...Southeast winds near 15 knots. Bay
waters a moderate chop. Scattered showers and thunderstorms.

$$

GMZ032-035-220230-
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 Sat Sep 21 2024

.TONIGHT...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.SUNDAY...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.SUNDAY NIGHT...East winds near 5 knots, increasing to 5 to 10
knots. Seas 1 foot or less. Nearshore waters smooth, becoming
smooth to a light chop. Scattered showers and isolated
thunderstorms.
.MONDAY...East winds 5 to 10 knots, increasing to near 10 knots.
Seas around 1 foot. Nearshore waters smooth to a light chop,
becoming a light chop. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East winds increasing to 10 to 15 knots. Seas
building to 1 to 2 feet. Nearshore waters becoming a light to
moderate chop. Scattered showers and isolated thunderstorms.
.TUESDAY...East winds 10 to 15 knots, increasing to near 15 knots.
Seas 1 to 2 feet, except 2 to 4 feet, occasionally to 5 feet west
of the Marquesas Keys. Nearshore waters a light to moderate chop,
becoming a moderate chop. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...East to southeast winds 15 to 20 knots. Seas
2 to 3 feet, except 3 to 5 feet, occasionally to 6 feet west of
the Marquesas Keys. Nearshore waters choppy. Scattered showers
and thunderstorms.
.WEDNESDAY...East to southeast winds 15 to 20 knots. Seas 2 to 3
feet, except 4 to 5 feet, occasionally to 6 feet west of the
Marquesas Keys. Nearshore waters choppy. Scattered showers and
thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 15 to 20 knots. Seas 2 to
3 feet, except 4 to 5 feet, occasionally to 6 feet west of the
Marquesas Keys. Nearshore waters choppy. Scattered showers and
thunderstorms.
.THURSDAY...Southeast winds 15 to 20 knots. Seas building to 2 to
4 feet, occasionally to 5 feet. West of the Marquesas Keys, seas
4 to 6 feet, occasionally to 8 feet. Nearshore waters choppy.
Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southeast to south winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet, except 5 to 6 feet,
occasionally to 8 feet west of the Marquesas Keys. Nearshore
waters choppy. Scattered showers and thunderstorms.

$$

GMZ042>044-220230-
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 Sat Sep 21 2024

.TONIGHT...Northeast to east winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop. Isolated showers
and thunderstorms.
.SUNDAY...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.SUNDAY NIGHT...East winds near 5 knots, increasing to 5 to 10
knots. Seas 1 foot or less, building to around 1 foot. Nearshore
waters smooth, becoming smooth to a light chop. Scattered showers
and isolated thunderstorms.
.MONDAY...East winds increasing to near 10 knots. Seas around 1
foot. Nearshore waters becoming a light chop. Scattered showers
and isolated thunderstorms.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Scattered showers and
isolated thunderstorms.
.TUESDAY...East winds 10 to 15 knots, increasing to near 15 knots.
Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters a
light to moderate chop, becoming a moderate chop. Scattered
showers and isolated thunderstorms.
.TUESDAY NIGHT...East to southeast winds 15 to 20 knots. Seas
2 to 4 feet, occasionally to 5 feet. Nearshore waters choppy.
Scattered showers and thunderstorms.
.WEDNESDAY...East to southeast winds 15 to 20 knots. Seas 3 to 4
feet, occasionally to 5 feet. Nearshore waters choppy. Scattered
showers and thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 15 to 20 knots. Seas 2 to
4 feet, occasionally to 5 feet, except 4 to 5 feet, occasionally
to 6 feet west of Cosgrove Shoal Light. Nearshore waters choppy.
Scattered showers and thunderstorms.
.THURSDAY...Southeast winds 15 to 20 knots. Seas 2 to 4 feet,
occasionally to 5 feet, except 4 to 5 feet, occasionally to
6 feet west of Cosgrove Shoal Light. Nearshore waters choppy.
Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southeast to south winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet, except 5 to 6 feet,
occasionally to 8 feet west of Cosgrove Shoal Light. Nearshore
waters choppy. Scattered showers and thunderstorms.

$$

GMZ052>055-072>075-220230-
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 Sat Sep 21 2024

.TONIGHT...Northeast to east winds 5 to 10 knots. Seas around 1
foot. Wave Detail: Northeast to east 1 foot at 3 seconds. Isolated
showers and thunderstorms.
.SUNDAY...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Wave Detail: Northeast to east 1 foot at 3 seconds.
Isolated showers and thunderstorms.
.SUNDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot.
Wave Detail: Northeast to east 1 foot at 3 seconds. Isolated
showers and thunderstorms.
.MONDAY...East winds near 10 knots. Seas 1 to 2 feet. Isolated
showers and thunderstorms.
.MONDAY NIGHT...East winds 10 to 15 knots, increasing to near 15
knots. Seas 2 to 3 feet. Scattered showers and isolated
thunderstorms.
.TUESDAY...East winds 10 to 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...East to southeast winds 15 to 20 knots. Seas
4 to 5 feet, occasionally to 6 feet. Numerous showers and
scattered thunderstorms.
.WEDNESDAY...East to southeast winds 15 to 20 knots. Seas 4 to
6 feet, occasionally to 8 feet. Numerous showers and scattered
thunderstorms.
.WEDNESDAY NIGHT...Southeast winds 15 to 20 knots. Seas 4 to
6 feet, occasionally to 8 feet. Numerous showers and scattered
thunderstorms.
.THURSDAY...Southeast winds 15 to 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Scattered showers and thunderstorms.
.THURSDAY NIGHT...Southeast to south winds 15 to 20 knots. Seas
4 to 6 feet, occasionally to 8 feet. Scattered showers and
thunderstorms.

$$

GMZ033-034-220230-
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 Sat Sep 21 2024

.TONIGHT...Northeast to east winds near 5 knots. Seas 1 foot or
less. Isolated showers and thunderstorms.
.SUNDAY...Northeast to east winds near 5 knots. Seas 1 foot or
less. Isolated showers and thunderstorms.
.SUNDAY NIGHT...East winds near 5 knots. Seas 1 foot or less.
Isolated showers and thunderstorms.
.MONDAY...East winds 5 to 10 knots. Seas around 1 foot. Scattered
showers and isolated thunderstorms.
.MONDAY NIGHT...East winds near 10 knots, increasing to near
15 knots after midnight. Seas 1 to 2 feet. Scattered showers and
isolated thunderstorms.
.TUESDAY...East winds near 15 knots. Seas 2 to 4 feet,
occasionally to 5 feet. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...East to southeast winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Scattered showers and
thunderstorms.
.WEDNESDAY...East to southeast winds near 20 knots. Seas 3 to
5 feet, occasionally to 6 feet. Scattered showers and
thunderstorms.
.WEDNESDAY NIGHT...Southeast winds near 20 knots. Seas 4 to
6 feet, occasionally to 8 feet. Scattered showers and
thunderstorms.
.THURSDAY...Southeast winds near 20 knots. Seas 4 to 6 feet,
occasionally to 8 feet. Numerous showers and scattered
thunderstorms.
.THURSDAY NIGHT...Southeast to south winds near 20 knots. Seas
5 to 7 feet, occasionally to 9 feet. Numerous showers and
scattered thunderstorms.

$$

DP