542
FZUS52 KKEY 211426
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1026 AM 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.

GMZ005-212030-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1026 AM EDT Sat Sep 21 2024

.SYNOPSIS...As a trough slides slowly 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.

$$

GMZ031-212030-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1026 AM EDT Sat Sep 21 2024

.THIS AFTERNOON...Northeast to east winds near 5 knots. Bay
waters smooth. Scattered showers and isolated thunderstorms.
.TONIGHT AND SUNDAY...Northeast to east winds near 5 knots. Bay
waters smooth. Isolated showers and thunderstorms.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots. Bay waters
smooth to a light chop. Scattered showers and isolated
thunderstorms.
.MONDAY...Northeast to east winds 5 to 10 knots, becoming east
near 10 knots. Bay waters smooth to a light chop, becoming a light
chop. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East winds 10 to 15 knots. Bay waters a light to
moderate chop. Scattered showers and isolated thunderstorms.
.TUESDAY...East winds 10 to 15 knots, increasing to near 15
knots in the afternoon. Bay waters a light to moderate chop,
becoming a moderate chop. Scattered showers and isolated
thunderstorms.
.TUESDAY NIGHT...East winds near 15 knots. Bay waters a moderate
chop. Scattered showers and thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...East to southeast winds near 15
knots. Bay waters a moderate chop. Scattered showers and
thunderstorms.

$$

GMZ032-035-212030-
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-
1026 AM EDT Sat Sep 21 2024

.THIS AFTERNOON...Northeast to east winds near 5 knots. Seas 1
foot or less. Nearshore waters smooth. Scattered showers and
isolated thunderstorms.
.TONIGHT...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.SUNDAY...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop.
Scattered showers and isolated thunderstorms.
.MONDAY...Northeast to east winds 5 to 10 knots, becoming east
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 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 15 to
20 knots in the afternoon. Seas building to 2 to 3 feet, except
building to 3 to 4 feet, occasionally to 5 feet, west of the
Marquesas Keys. Nearshore waters a light to moderate chop,
becoming choppy. 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 AND WEDNESDAY NIGHT...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.

$$

GMZ042>044-212030-
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-
1026 AM EDT Sat Sep 21 2024

.THIS AFTERNOON...Northeast to east winds near 5 knots. Seas 1
foot or less. Nearshore waters smooth. Scattered showers and
isolated thunderstorms.
.TONIGHT AND SUNDAY...Northeast to east winds near 5 knots. Seas
1 foot or less. Nearshore waters smooth. Isolated showers and
thunderstorms.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Nearshore waters smooth to a light chop. Scattered
showers and isolated thunderstorms.
.MONDAY...East winds near 10 knots. Seas building to 1 to 2 feet.
Nearshore waters a light chop. Scattered showers and isolated
thunderstorms.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop. Scattered showers and
isolated thunderstorms.
.TUESDAY...East winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. Seas building to 3 to 4 feet,
occasionally to 5 feet. Nearshore waters a light to moderate chop,
becoming choppy. Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT...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 AND WEDNESDAY NIGHT...East to southeast winds 15 to 20
knots. Seas 3 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.

$$

GMZ052>055-072>075-212030-
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-
1026 AM EDT Sat Sep 21 2024

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

$$

GMZ033-034-212030-
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-
1026 AM EDT Sat Sep 21 2024

.THIS AFTERNOON...Northeast to east winds near 5 knots. Seas
around 1 foot. Wave Detail: East 1 foot at 2 seconds. Isolated
showers and thunderstorms.
.TONIGHT AND SUNDAY...Northeast to east winds near 5 knots. Seas
1 foot or less. Wave Detail: East 1 foot at 2 seconds. Isolated
showers and thunderstorms.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Scattered showers and isolated thunderstorms.
.MONDAY...East winds 5 to 10 knots, increasing to near 10 knots.
Seas around 1 foot. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas building to around
2 feet. Scattered showers and isolated thunderstorms.
.TUESDAY...East winds near 15 knots, increasing to 15 to 20
knots. Seas building to 3 to 4 feet, occasionally to 5 feet.
Scattered showers and isolated thunderstorms.
.TUESDAY NIGHT AND WEDNESDAY...East to southeast winds near 20
knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers
and thunderstorms.
.WEDNESDAY NIGHT...East to southeast winds near 20 knots. Seas
4 to 6 feet, occasionally to 8 feet. Scattered showers and
thunderstorms.

$$

DP/Jacobson