Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 140328
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1028 PM EST Wed Dec 13 2017

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.

GMZ005-140930-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1028 PM EST Wed Dec 13 2017

.SYNOPSIS...An area of high pressure will move eastward across
the Gulf of Mexico to be over the Florida Peninsula overnight and
Thursday. Another high pressure system will intensify and advance
eastward across the southeastern United States and western North
Atlantic Friday through Monday.

The Approximate Shoreward Edge of the Gulf Stream as of
December 12, 2017,

50 NM South of Dry Tortugas Light, on Loggerhead Key.
13 NM South of Cosgrove Shoal Light, off the Marquesas Keys.
21 NM South of Sand Key Light, off Key West.
31 NM South of Looe Key, off Big Pine Key.
36 NM South of Sombrero Key Light, off Marathon.
15 NM Southeast of Alligator Reef Light, off Islamorada.
10 NM Southeast of Molasses Reef Light, off Key Largo.
 2 NM East of Carysfort Reef Light, off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

$$

GMZ031-140930-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1028 PM EST Wed Dec 13 2017

.OVERNIGHT...North winds near 5 knots. Bay waters smooth.
.THURSDAY...Northwest to north winds 5 to 10 knots. Bay waters
smooth to a light chop.
.THURSDAY NIGHT...Variable winds near 5 knots. Bay waters smooth.
.FRIDAY...Northeast to east winds near 5 knots. Bay waters
smooth.
.FRIDAY NIGHT...North to northeast winds 5 to 10 knots. Bay
waters smooth to a light chop.
.SATURDAY...Northeast to east winds near 10 knots. Bay waters a
light chop. Isolated showers.
.SATURDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. Isolated showers.
.SUNDAY...East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Isolated showers.
.SUNDAY NIGHT...East to southeast winds near 10 knots. Bay waters
a light chop. Isolated showers.
.MONDAY...Southeast winds near 10 knots. Bay waters a light chop.
Isolated showers.
.MONDAY NIGHT...East winds near 10 knots. Bay waters a light
chop. Isolated showers.

$$

GMZ032-035-140930-
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-
1028 PM EST Wed Dec 13 2017

.OVERNIGHT...North winds near 5 knots. Seas 1 to 2 feet due to
lingering northwesterly swells. Nearshore waters smooth.
.THURSDAY...Northeast winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth.
.THURSDAY NIGHT...East winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth.
.FRIDAY...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop.
.SATURDAY...Northeast to east winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.SATURDAY NIGHT...East winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.SUNDAY...East to southeast winds 10 to 15 knots. Seas around 2
feet. Nearshore waters a light to moderate chop. Isolated showers.
.SUNDAY NIGHT...East to southeast winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.MONDAY...Southeast winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Isolated showers.
.MONDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Isolated showers.

$$

GMZ042>044-140930-
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-
1028 PM EST Wed Dec 13 2017

.OVERNIGHT...North winds 5 to 10 knots early, decreasing to around
5 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light
chop, becoming smooth.
.THURSDAY...Northeast winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop.
.THURSDAY NIGHT...East winds near 5 knots. Seas 1 foot or less.
Nearshore waters smooth.
.FRIDAY...Northeast to east winds near 5 knots. Seas 1 foot or
less. Nearshore waters smooth.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 to 2 feet.
Nearshore waters smooth to a light chop.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 1 to
3 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 2 to 4 feet.
Nearshore waters choppy. Isolated showers.
.SUNDAY...East to southeast winds 15 to 20 knots. Seas 2 to
4 feet. Nearshore waters choppy. Isolated showers.
.SUNDAY NIGHT...East to southeast winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop. Isolated showers.
.MONDAY...Southeast winds 10 to 15 knots. Seas 1 to 3 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.MONDAY NIGHT...East winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Isolated showers.

$$

GMZ052>055-072>075-140930-
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-
1028 PM EST Wed Dec 13 2017

.OVERNIGHT...North to northeast winds 5 to 10 knots. Seas 2 to 4
feet, especially west of Halfmoon Shoal Light.
.THURSDAY...Northeast winds near 5 knots. Seas 1 to 3 feet.
.THURSDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet.
.FRIDAY...Northeast to east winds 5 to 10 knots. Seas 1 to
2 feet.
.FRIDAY NIGHT...Northeast winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.SATURDAY...Northeast to east winds near 15 knots. Seas 3 to 5
feet. Isolated showers.
.SATURDAY NIGHT...East winds 15 to 20 knots. Seas 4 to 6 feet.
Isolated showers.
.SUNDAY...East to southeast winds 15 to 20 knots. Seas 4 to
6 feet. Isolated showers.
.SUNDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 4 to
6 feet. Isolated showers.
.MONDAY...Southeast winds near 15 knots. Seas 3 to 5 feet.
Isolated showers.
.MONDAY NIGHT...East winds 10 to 15 knots. Seas 2 to 4 feet.
Isolated showers.

$$

GMZ033-034-140930-
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-
1028 PM EST Wed Dec 13 2017

.OVERNIGHT...North winds near 5 knots, becoming variable less
than 5 knots. Seas 2 to 4 feet due to lingering northwesterly
swells.
.THURSDAY...Variable winds near 5 knots. Seas 1 to 3 feet due to
northwesterly swells.
.THURSDAY NIGHT...East to southeast winds 5 to 10 knots. Seas 1
to 2 feet.
.FRIDAY...East winds near 5 knots. Seas 1 to 2 feet.
.FRIDAY NIGHT...Northeast winds 5 to 10 knots. Seas 1 to 2 feet.
.SATURDAY...Northeast to east winds 10 to 15 knots. Seas 2 to 3
feet. Isolated showers.
.SATURDAY NIGHT...East winds near 15 knots. Seas 3 to 4 feet.
Isolated showers.
.SUNDAY...East to southeast winds near 15 knots. Seas 3 to 5
feet. Isolated showers.
.SUNDAY NIGHT...East to southeast winds near 15 knots. Seas 3 to
4 feet. Isolated showers.
.MONDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.MONDAY NIGHT...East to southeast winds near 10 knots. Seas 1 to
3 feet. Isolated showers.

$$



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