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National Weather Service Marine Forecast FZUS52 KKEY

FZUS52 KKEY 231016
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
516 AM EST Sat Jan 23 2021

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.

GMZ005-231630-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
516 AM EST Sat Jan 23 2021

SYNOPSIS
Weak high pressure will linger across the Straits of
Florida and the Florida Keys today. A dome of high pressure will
slide southeastward off the Carolina coastline tonight and reach
near Bermuda by Sunday night and Monday. Southeast breezes will
freshen Sunday night and will peak on Monday, then diminish a bit
Monday night and Tuesday. A cold front is looking increasingly
likely to pass through the Keys sometime on Thursday, freshening
northwest to north breezes.

The Approximate Shoreward Edge of the Gulf Stream as
of January 23...

52 NM South of Dry Tortugas Light...on Loggerhead Key.
26 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
26 NM South of Sand Key Light...off Key West.
17 NM South of Looe Key...off Big Pine Key.
25 NM South of Sombrero Key Light...off Marathon.
16 NM Southeast of Alligator Reef Light...off Islamorada.
10 NM Southeast of Molasses Reef Light...off Key Largo.
 7 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.



GMZ031-231630-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
516 AM EST Sat Jan 23 2021

TODAY
Northwest winds near 5 knots becoming west in the
afternoon. Bay waters smooth.

TONIGHT
North to northeast winds increasing to 5 to 10 knots.
Bay waters becoming smooth to a light chop.

SUNDAY
Northeast winds 5 to 10 knots, becoming east. Bay
waters smooth to a light chop.

SUNDAY NIGHT
East winds increasing to 10 to 15 knots, becoming
southeast. Bay waters becoming a light to moderate chop.

MONDAY
Southeast winds 10 to 15 knots. Bay waters a light to
moderate chop.

MONDAY NIGHT
Southeast to south winds 10 to 15 knots. Bay
waters a light to moderate chop.

TUESDAY
Southeast to south winds decreasing to 5 to 10 knots.
Bay waters becoming smooth to a light chop.

TUESDAY NIGHT
East to southeast winds 5 to 10 knots. Bay
waters smooth a light chop.

WEDNESDAY
Southeast winds 5 to 10 knots. Bay waters smooth to
a light chop.

WEDNESDAY NIGHT
Southeast winds near 5 knots, becoming variable.
Bay waters smooth.



GMZ032-035-231630-
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-
516 AM EST Sat Jan 23 2021

TODAY
Mainly north winds near 5 knots. Seas less than 1 foot.
Nearshore waters smooth.

TONIGHT
Northeast winds increasing to 5 to 10 knots. Seas
building to around 1 foot. Nearshore waters becoming smooth to a
light chop.

SUNDAY
Northeast winds 5 to 10 knots, becoming east. Seas
around 1 foot. Nearshore waters smooth to a light chop.

SUNDAY NIGHT
East winds near 10 knots, becoming southeast and
increasing to 10 to 15 knots. Seas building to 1 to 2 feet.
Nearshore waters a light chop, becoming a light to moderate chop.

MONDAY
Southeast winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop.

MONDAY NIGHT
Southeast winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop.

TUESDAY
Southeast to south winds near 10 knots. Seas around
1 foot. Nearshore waters a light chop.

TUESDAY NIGHT
East to southeast winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop.

WEDNESDAY
East to southeast winds near 10 knots. Seas around
1 foot. Nearshore waters a light chop.

WEDNESDAY NIGHT
East winds near 5 knots, becoming variable.
Seas 1 foot or less. Nearshore waters smooth.



GMZ042>044-231630-
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-
516 AM EST Sat Jan 23 2021

TODAY
North to northeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth.

TONIGHT
Northeast to east winds increasing to 5 to 10 knots.
Seas building to 1 to 2 feet. Nearshore waters becoming smooth to
a light chop.

SUNDAY
Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet. Nearshore waters smooth to a light chop.

SUNDAY NIGHT
East to southeast winds near 10 knots, increasing
to 10 to 15 knots. Seas 1 to 3 feet, building to 2 to 3 feet.
Nearshore waters a light chop, becoming a light to moderate chop.

MONDAY
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop.

MONDAY NIGHT
Southeast to south winds 10 to 15 knots. Seas
2 to 3 feet. Nearshore waters a light to moderate chop.

TUESDAY
Southeast to south winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop.

TUESDAY NIGHT AND WEDNESDAY
East to southeast winds near
10 knots. Seas 1 to 2 feet. Nearshore waters a light chop.

WEDNESDAY NIGHT
East winds near 5 knots, becoming variable.
Seas 1 to 2 feet. Nearshore waters smooth.



GMZ052>055-072>075-231630-
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-
516 AM EST Sat Jan 23 2021

TODAY
North to northeast winds near 5 knots, increasing to
5 to 10 knots in the afternoon. Seas around 1 foot.

TONIGHT
Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet.

SUNDAY
East winds increasing to 10 to 15 knots. Seas around
2 feet, building to 2 to 3 feet.

SUNDAY NIGHT
East winds 10 to 15 knots, becoming southeast and
increasing to near 15 knots. Seas 2 to 3 feet, building to 3 to 4
feet.

MONDAY
Southeast winds near 15 knots. Seas 3 to 4 feet.

MONDAY NIGHT
Southeast winds 10 to 15 knots. Seas 3 to 4 feet,
subsiding to 2 to 3 feet.

TUESDAY
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.

TUESDAY NIGHT AND WEDNESDAY
East to southeast winds 10 to
15 knots. Seas 2 to 3 feet.

WEDNESDAY NIGHT
Northeast to east winds 5 to 10 knots. Seas
1 to 2 feet.



GMZ033-034-231630-
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-
516 AM EST Sat Jan 23 2021

TODAY
North to northeast winds near 5 knots. Seas 1 foot or
less.

TONIGHT
Northeast to east winds increasing to 5 to 10 knots.
Seas building to 1 to 2 feet.

SUNDAY
Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet.

SUNDAY NIGHT
East winds 5 to 10 knots, becoming southeast
and increasing to 10 to 15 knots. Seas 1 to 2 feet, building to
1 to 3 feet.

MONDAY
Southeast winds 10 to 15 knots. Seas 2 to 3 feet.

MONDAY NIGHT
Southeast to south winds near 10 knots. Seas 1 to
3 feet, subsiding to 1 to 2 feet.

TUESDAY
Southeast to south winds near 10 knots. Seas 1 to
2 feet.

TUESDAY NIGHT
East to southeast winds near 10 knots. Seas 1 to
2 feet.

WEDNESDAY
East to southeast winds 5 to 10 knots. Seas 1 to
2 feet.

WEDNESDAY NIGHT
East winds near 5 knots, becoming variable.
Seas 1 to 2 feet, subsiding to around 1 foot.



NB/WLC