Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 162023
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
423 PM EDT Wed Aug 16 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.

GMZ005-170230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
423 PM EDT Wed Aug 16 2017

.SYNOPSIS...An Atlantic ridge of high pressure will extend across
Central Florida tonight through Thursday night. A low pressure
system will move into the eastern Caribbean Sea Friday into
Friday night. This low pressure system will progress westward
through the central and western Caribbean Sea Saturday into early
next week, resulting in freshening east to southeast breezes.

The Approximate Shoreward Edge of the Gulf Stream current, as of
August 16th, 2017,

22 NM South of Dry Tortugas Light...on Loggerhead Key.
12 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
11 NM South of Sand Key Light...off Key West.
15 NM South of Looe Key...off Big Pine Key.
15 NM South of Sombrero Key Light...off Marathon.
11 NM Southeast of Alligator Reef Light...off Islamorada.
 9 NM Southeast of Molasses Reef Light...off Key Largo.
 6 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic Office.

$$

GMZ031-170230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
423 PM EDT Wed Aug 16 2017

.TONIGHT...Northeast winds near 5 knots, becoming east to
southeast and increasing to near 10 knots. Bay waters smooth,
becoming a light chop. Scattered showers and isolated
thunderstorms.
.THURSDAY THROUGH FRIDAY...East to southeast winds near 10 knots.
Bay waters a light chop. Scattered showers and isolated
thunderstorms.
.FRIDAY NIGHT...East to southeast winds 10 to 15 knots. Bay
waters a light to moderate chop. Scattered showers and isolated
thunderstorms.
.SATURDAY...East to southeast winds near 15 knots. Bay waters a
moderate chop. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT AND SUNDAY...East to southeast winds near 15
knots. Bay waters a moderate chop. Scattered showers and isolated
thunderstorms.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...East to southeast winds 15 to
20 knots. Bay waters choppy. Scattered showers and isolated
thunderstorms.

$$

GMZ032-035-170230-
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 PM EDT Wed Aug 16 2017

.TONIGHT...Northeast to east winds 5 to 10 knots, becoming east
to southeast and increasing to 10 to 15 knots. Seas 1 foot or
less, building to 1 to 2 feet. Nearshore waters smooth to a light
chop, becoming a light to moderate chop. Scattered showers and
isolated thunderstorms.
.THURSDAY...East to southeast winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.THURSDAY NIGHT AND FRIDAY...East to southeast winds 10 to 15
knots. Seas around 1 foot. Nearshore waters a light to moderate
chop. Scattered showers and isolated thunderstorms.
.FRIDAY NIGHT AND SATURDAY...East to southeast winds near 15
knots. Seas 1 to 2 feet. Nearshore waters a moderate chop.
Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT AND SUNDAY...East to southeast winds near 15
knots. Seas 1 to 2 feet. Nearshore waters a moderate chop.
Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...East to southeast winds 15 to
20 knots. Seas around 2 feet. Nearshore waters choppy. Scattered
showers and isolated thunderstorms.

$$

GMZ042>044-170230-
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 PM EDT Wed Aug 16 2017

.TONIGHT...East to southeast winds near 10 knots, increasing to
10 to 15 knots. Seas around 1 foot, building to around 2 feet.
Nearshore waters a light to moderate chop. Scattered showers and
isolated thunderstorms.
.THURSDAY THROUGH FRIDAY...East to southeast winds 10 to 15 knots.
Seas around 2 feet. Nearshore waters a light to moderate chop.
Scattered showers and isolated thunderstorms.
.FRIDAY NIGHT AND SATURDAY...East to southeast winds near 15
knots. Seas 2 to 3 feet. Nearshore waters a moderate chop.
Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT AND SUNDAY...East to southeast winds near 15
knots. Seas 2 to 3 feet. Nearshore waters a moderate chop.
Scattered showers and isolated thunderstorms.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...East to southeast winds 15 to
20 knots. Seas 2 to 4 feet. Nearshore waters choppy. Scattered
showers and isolated thunderstorms.

$$

GMZ052>055-072>075-170230-
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 PM EDT Wed Aug 16 2017

.TONIGHT...East to southeast winds near 15 knots. Seas 3 to 4
feet. Scattered showers and isolated thunderstorms.
.THURSDAY...East to southeast winds 10 to 15 knots. Seas 2 to 4
feet. Scattered showers and isolated thunderstorms.
.THURSDAY NIGHT...East to southeast winds near 15 knots. Seas 3 to
4 feet. Scattered showers and isolated thunderstorms.
.FRIDAY...East to southeast winds near 15 knots. Seas 3 to 5 feet.
Scattered showers and isolated thunderstorms.
.FRIDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 4 to
5 feet. Scattered showers and isolated thunderstorms.
.SATURDAY...East to southeast winds 15 to 20 knots. Seas 4 to 6
feet. Scattered showers and isolated thunderstorms.
.SATURDAY NIGHT AND SUNDAY...East to southeast winds 15 to 20
knots. Seas 4 to 6 feet. Scattered showers and isolated
thunderstorms.
.SUNDAY NIGHT...East to southeast winds near 20 knots. Seas 5 to
7 feet. Scattered showers and isolated thunderstorms.
.MONDAY...East to southeast winds 15 to 20 knots. Seas 4 to 6
feet. Scattered showers and isolated thunderstorms.
.MONDAY NIGHT...East to southeast winds near 20 knots. Seas 5 to
7 feet. Scattered showers and isolated thunderstorms.

$$

GMZ033-034-170230-
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 PM EDT Wed Aug 16 2017

.TONIGHT...Northeast to east winds 5 to 10 knots, becoming east
and increasing to 10 to 15 knots. Seas building to 2 to 3 feet.
Scattered showers and isolated thunderstorms.
.THURSDAY THROUGH FRIDAY...East to southeast winds 10 to 15
knots. Seas 2 to 3 feet. Scattered showers and isolated
thunderstorms.
.FRIDAY NIGHT AND SATURDAY...East to southeast winds near 15
knots. Seas 2 to 4 feet. Scattered showers and isolated
thunderstorms.
.SATURDAY NIGHT AND SUNDAY...East to southeast winds near 15
knots. Seas 2 to 4 feet. Scattered showers and isolated
thunderstorms.
.SUNDAY NIGHT THROUGH MONDAY NIGHT...East to southeast winds 15 to
20 knots. Seas 3 to 5 feet. Scattered showers and isolated
thunderstorms.

$$

BS


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