070
FZUS52 KKEY 200823
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
423 AM EDT Fri Sep 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.

GMZ005-201430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
423 AM EDT Fri Sep 20 2024

.SYNOPSIS...Light and often variable breezes will continue today
due to a persistent trough near the Atlantic Coast and a weak
area of high pressure east of the Bahamas. The trough will
slowly slide eastward into the western North Atlantic this
weekend, as a ridge expands its control across the Southeast
United States. Winds will begin to take on a predominantly light,
easterly direction. Confidence in the extended marine forecast
remains quite low and will be highly dependent on the expected
formation of a low pressure system in the northwestern Caribbean
Sea. Regardless of the ultimate fate of this low, breezes are
expected to freshen by Tuesday, as the low interacts with high
pressure over the Southeast.

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.

$$

GMZ031-201430-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
423 AM EDT Fri Sep 20 2024

.TODAY...Variable winds near 5 knots. Bay waters smooth. Scattered
showers and isolated thunderstorms.
.TONIGHT...Variable winds near 5 knots, becoming northeast. Bay
waters smooth. Scattered showers and isolated thunderstorms.
.SATURDAY THROUGH SUNDAY...Northeast to east winds 5 to 10 knots.
Bay waters smooth to a light chop. Scattered showers and isolated
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 near 10 knots. Bay waters 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.
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 isolated thunderstorms.

$$

GMZ032-035-201430-
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-
423 AM EDT Fri Sep 20 2024

.TODAY...Variable winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.TONIGHT...Variable winds near 5 knots, becoming northeast to east.
Seas 1 foot or less. Nearshore waters smooth. Scattered showers
and isolated thunderstorms.
.SATURDAY THROUGH SUNDAY...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.
and isolated thunderstorms.
.SUNDAY NIGHT...Northeast to 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...Northeast to east winds near 10 knots, becoming east and
increasing to 10 to 15 knots. Seas around 1 foot, building to 1 to
2 feet. Nearshore waters a light chop, becoming a light to
moderate chop. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East winds near 15 knots. Seas 1 to 2 feet,
except building to 2 to 3 feet west of the Marquesas Keys.
Nearshore waters a moderate chop. Scattered showers and isolated
thunderstorms.
.TUESDAY...East winds near 15 knots, increasing to 15 to 20
knots. 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 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 4 feet, occasionally to 5 feet west of the
Marquesas Keys. Nearshore waters choppy. Scattered showers and
isolated thunderstorms.

$$

GMZ042>044-201430-
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-
423 AM EDT Fri Sep 20 2024

.TODAY...Variable winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth. Scattered showers and isolated
thunderstorms.
.TONIGHT...Variable winds near 5 knots, becoming northeast to
east. Seas 1 foot or less. Nearshore waters smooth. Scattered
showers and isolated thunderstorms.
.SATURDAY...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.
.SATURDAY NIGHT AND SUNDAY...Northeast to east winds 5 to 10
knots. Seas around 1 foot. Nearshore waters smooth to a light
chop. Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...Northeast to 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...Northeast to east winds near 10 knots, becoming east and
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 isolated thunderstorms.
.MONDAY NIGHT...East winds near 15 knots. Seas building to 2 to 3
feet. Nearshore waters a moderate chop. Scattered showers and
isolated thunderstorms.
.TUESDAY...East winds near 15 knots, increasing to 15 to 20 knots.
Seas 2 to 4 feet, occasionally to 5 feet. Nearshore waters a
moderate chop, becoming choppy. 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 isolated thunderstorms.

$$

GMZ052>055-072>075-201430-
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-
423 AM EDT Fri Sep 20 2024

.TODAY...Variable winds near 5 knots. Seas around 1 foot. Wave
Detail: Northeast to east 1 foot at 2 seconds. Scattered showers
and isolated thunderstorms.
.TONIGHT...Variable winds near 5 knots, becoming northeast to
east. Seas around 1 foot. Wave Detail: Northeast 1 foot at 2
seconds. Scattered showers and isolated thunderstorms.
.SATURDAY...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Wave Detail: Northeast to east 1 foot at 2 seconds.
Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT...Northeast to east winds 5 to 10 knots. Seas
around 1 foot. Scattered showers and isolated thunderstorms.
.SUNDAY...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots, increasing
to near 10 knots. Seas 1 to 2 feet. Scattered showers and
isolated thunderstorms.
.MONDAY...Northeast to east winds near 10 knots, becoming east and
increasing to 10 to 15 knots. Seas 1 to 2 feet, building to 2 to 3
feet. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East winds near 15 knots. Seas 2 to 4 feet.
Scattered showers and isolated thunderstorms.
.TUESDAY...East winds 15 to 20 knots. Seas building to 3 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. Scattered showers and
isolated thunderstorms.

$$

GMZ033-034-201430-
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-
423 AM EDT Fri Sep 20 2024

.TODAY...North winds near 5 knots. Seas 1 foot or less. Wave
Detail: Northwest to north 1 foot at 3 seconds. Scattered showers
and isolated thunderstorms.
.TONIGHT...North to northeast winds 5 to 10 knots, becoming
northeast to east. Seas around 1 foot. Wave Detail: Northwest to
north 1 foot at 3 seconds. Scattered showers and isolated
thunderstorms.
.SATURDAY...Northeast to east winds 5 to 10 knots. Seas around
1 foot. Wave Detail: Northeast 1 foot at 3 seconds. Scattered
showers and isolated thunderstorms.
.SATURDAY NIGHT AND SUNDAY...Northeast to east winds 5 to 10
knots. Seas around 1 foot. Scattered showers and isolated
thunderstorms.
.SUNDAY NIGHT...Northeast to east winds 5 to 10 knots, increasing
to near 10 knots. Seas around 1 foot, building to 1 to 2 feet.
Scattered showers and isolated thunderstorms.
.MONDAY...East winds near 10 knots, increasing to 10 to 15 knots.
Seas 1 to 2 feet, building to around 2 feet. Scattered showers
and isolated thunderstorms.
.MONDAY NIGHT...East winds near 15 knots, increasing to 15 to 20
knots. Seas 2 to 3 feet, building to 3 to 4 feet. Scattered
showers and isolated thunderstorms.
.TUESDAY...East winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 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
isolated thunderstorms.

$$

BT