Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 230320
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1020 PM EST Mon Jan 22 2018

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.

GMZ005-230930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1020 PM EST Mon Jan 22 2018

.SYNOPSIS...A high pressure cell will extend from the western
North Atlantic to northern Florida tonight. The system will shift
eastward from Tuesday through early Wednesday. Freshening breezes
and building seas are expected Wednesday through Thursday in
response to another intensifying high pressure system over the
southern United States. This system will expand eastward late
Wednesday, reaching just offshore of South Carolina Thursday.

The Approximate Shoreward Edge of the Gulf Stream as of
January 19, 2018...

45 NM South of Dry Tortugas Light, on Loggerhead Key.
33 NM South of Cosgrove Shoal Light, off the Marquesas Keys.
30 NM South of Sand Key Light, off Key West.
28 NM South of Looe Key, off Big Pine Key.
22 NM South of Sombrero Key Light, off Marathon.
13 NM Southeast of Alligator Reef Light, off Islamorada.
 7 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.

$$

GMZ031-230930-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1020 PM EST Mon Jan 22 2018

.OVERNIGHT...East to southeast winds 5 to 10 knots. Bay waters
smooth to a light chop. Isolated showers.
.TUESDAY...Southeast winds near 5 knots. Bay waters smooth.
Scattered showers.
.TUESDAY NIGHT...East to southeast winds near 5 knots becoming
north to northeast after midnight. Bay waters smooth. Isolated
showers.
.WEDNESDAY...Northeast to east winds 5 to 10 knots. Bay waters
smooth to a light chop. Isolated showers.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Isolated showers.
.THURSDAY...Northeast winds 15 to 20 knots. Bay waters choppy.
Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 15 to 20 knots. Bay
waters choppy. Isolated showers.
.FRIDAY...East winds 15 to 20 knots. Bay waters choppy. Isolated
showers.
.FRIDAY NIGHT...East winds 15 to 20 knots. Bay waters choppy.
Isolated showers.
.SATURDAY...East winds near 15 knots. Bay waters a moderate chop.
Isolated showers.
.SATURDAY NIGHT...East winds near 15 knots. Bay waters a moderate
chop. Isolated showers.

$$

GMZ032-035-230930-
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-
1020 PM EST Mon Jan 22 2018

.OVERNIGHT...East to southeast winds near 10 knots. Seas 1 foot
or less. Nearshore waters a light chop. Isolated showers.
.TUESDAY...East to southeast winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth. Scattered showers.
.TUESDAY NIGHT...East winds near 5 knots becoming north to
northeast after midnight. Seas 1 foot or less. Nearshore waters
smooth to a light chop. Isolated showers.
.WEDNESDAY...North to northeast winds 5 to 10 knots. Seas 1 foot
or less. Nearshore waters smooth to a light chop. Isolated
showers.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots. Seas 1 to
2 feet. Nearshore waters choppy. Isolated showers.
.THURSDAY...Northeast to east winds 15 to 20 knots. Seas 2 to
3 feet. Nearshore waters choppy. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds near 20 knots. Seas
1 to 2 feet. Nearshore waters rough. Isolated showers.
.FRIDAY...East winds near 20 knots. Seas 2 to 3 feet. Nearshore
waters rough. Isolated showers.
.FRIDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 3 feet.
Nearshore waters choppy. Isolated showers.
.SATURDAY...East winds 15 to 20 knots. Seas 1 to 2 feet.
Nearshore waters choppy. Isolated showers.
.SATURDAY NIGHT...East winds near 15 knots. Seas 1 to 2 feet.
Nearshore waters a moderate chop. Isolated showers.

$$

GMZ042>044-230930-
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-
1020 PM EST Mon Jan 22 2018

.OVERNIGHT...East to southeast winds 10 to 15 knots. Seas 1 to
3 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.TUESDAY...East to southeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Scattered showers.
.TUESDAY NIGHT...Northeast to east winds 5 to 10 knots, becoming
north to northeast and increasing to 10 to 15 knots late. Seas 1
to 2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.WEDNESDAY...Northeast winds increasing to near 15 knots. Seas 1
to 3 feet. Nearshore waters becoming a moderate chop. Isolated
showers.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots. Seas 2 to
3 feet. Nearshore waters choppy. Isolated showers.
.THURSDAY...Northeast to east winds 20 to 25 knots. Seas 2 to 4
feet. Nearshore waters very rough. Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas 3
to 5 feet. Nearshore waters very rough. Isolated showers.
.FRIDAY...East winds near 25 knots. Seas 4 to 6 feet. Nearshore
waters extremely rough. Isolated showers.
.FRIDAY NIGHT...East winds 20 to 25 knots. Seas 3 to 5 feet.
Nearshore waters very rough. Isolated showers.
.SATURDAY...East winds near 20 knots. Seas 3 to 4 feet. Nearshore
waters rough. Isolated showers.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 4 feet.
Nearshore waters choppy. Isolated showers.

$$

GMZ052>055-072>075-230930-
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-
1020 PM EST Mon Jan 22 2018

.OVERNIGHT...East to southeast winds 10 to 15 knots. Seas 3 to
5 feet. Isolated showers.
.TUESDAY...East winds near 10 knots. Seas 2 to 3 feet. Scattered
showers.
.TUESDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3
feet. Isolated showers.
.WEDNESDAY...Northeast winds near 15 knots, increasing to 15 to
20 knots. Seas 3 to 5 feet. Isolated showers.
.WEDNESDAY NIGHT...Northeast winds increasing to 20 to 25 knots.
Seas 4 to 6 feet building to 5 to 8 feet after midnight. Isolated
showers.
.THURSDAY...Northeast winds 20 to 25 knots. Seas 6 to 9 feet.
Isolated showers.
.THURSDAY NIGHT...Northeast to east winds near 25 knots. Seas 7 to
10 feet. Isolated showers.
.FRIDAY...East winds 25 to 30 knots. Seas 8 to 12 feet. Isolated
showers.
.FRIDAY NIGHT...East winds near 25 knots. Seas 8 to 11 feet.
Isolated showers.
.SATURDAY...East winds 20 to 25 knots. Seas 7 to 10 feet. Isolated
showers.
.SATURDAY NIGHT...East to southeast winds 20 to 25 knots. Seas 6
to 9 feet. Isolated showers.

$$

GMZ033-034-230930-
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-
1020 PM EST Mon Jan 22 2018

.OVERNIGHT...Southeast winds 10 to 15 knots. Seas 1 to 3 feet.
Scattered showers.
.TUESDAY...Southeast winds 5 to 10 knots. Seas 1 foot or less.
Scattered showers.
.TUESDAY NIGHT...East winds near 5 knots becoming north to
northeast 10 to 15 knots in the late evening and overnight. Seas
1 foot or less building to 1 to 2 feet after midnight. Isolated
showers.
.WEDNESDAY...North to northeast winds 10 to 15 knots. Seas 3 to
5 feet. Isolated showers.
.WEDNESDAY NIGHT...Northeast winds 15 to 20 knots. Seas 4 to
6 feet. Isolated showers.
.THURSDAY...Northeast winds 20 to 25 knots. Seas 4 to 6 feet.
Isolated showers.
.THURSDAY NIGHT...Northeast to east winds 20 to 25 knots. Seas
4 to 6 feet. Isolated showers.
.FRIDAY...East winds 20 to 25 knots. Seas 4 to 7 feet. Isolated
showers.
.FRIDAY NIGHT...East winds 20 to 25 knots. Seas 4 to 7 feet.
Isolated showers.
.SATURDAY...East winds 20 to 25 knots. Seas 4 to 6 feet. Isolated
showers.
.SATURDAY NIGHT...East to southeast winds 15 to 20 knots. Seas
4 to 6 feet. Isolated showers.

$$


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