Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 210234
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1034 PM EDT Thu Jul 20 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.

GMZ005-210830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1034 PM EDT Thu Jul 20 2017

.SYNOPSIS...A weak pressure pattern will continue across the
Florida Keys coastal waters through Friday. A weak ridge near the
northern Bahamas will move northward and build westward across
central Florida Friday night through early Tuesday.

The approximate shoreward edge of the Gulf Stream as of July 20,
2017,

16 NM South of Dry Tortugas Light, on Loggerhead Key.
13 NM South of Cosgrove Shoal Light, off the Marquesas Keys.
14 NM South of Sand Key Light, off Key West.
17 NM South of Looe Key, off Big Pine Key.
17 NM South of Sombrero Key Light, off Marathon.
11 NM Southeast of Alligator Reef Light, off Islamorada.
 8 NM Southeast of Molasses Reef Light, off Key Largo.
 4 NM East of Carysfort Reef Light, off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic
Office.

$$

GMZ031-210830-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1034 PM EDT Thu Jul 20 2017

.OVERNIGHT...Variable winds near 5 knots. Bay waters smooth.
Isolated showers and thunderstorms.
.FRIDAY...South winds 5 to 10 knots. Bay waters smooth to a light
chop. Isolated showers and thunderstorms.
.FRIDAY NIGHT...Southeast winds near 5 knots. Bay waters smooth.
Isolated showers.
.SATURDAY...Southeast winds 5 to 10 knots. Bay waters smooth to a
light chop. Isolated showers.
.SATURDAY NIGHT...East to southeast winds 5 to 10 knots. Bay
waters smooth to a light chop. Isolated showers.
.SUNDAY...East to southeast winds near 10 knots. Bay waters
a light chop. Isolated showers and thunderstorms.
.SUNDAY NIGHT THROUGH TUESDAY NIGHT...East to southeast winds
near 10 knots. Bay waters a light chop. Scattered showers and
isolated thunderstorms.

$$

GMZ032-035-210830-
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-
1034 PM EDT Thu Jul 20 2017

.OVERNIGHT...Variable winds near 5 knots. Seas less than 1 foot.
Nearshore waters smooth. Isolated showers and thunderstorms.
.FRIDAY...Variable winds near 5 knots. Seas less than 1 foot.
Nearshore waters smooth. Isolated showers and thunderstorms.
.FRIDAY NIGHT...Southeast winds near 5 knots. Seas less than
1 foot. Nearshore waters smooth. Isolated showers.
.SATURDAY...Southeast winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Isolated showers.
.SATURDAY NIGHT...East winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Isolated showers.
.SUNDAY...East to southeast winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Isolated showers and
thunderstorms.
.SUNDAY NIGHT THROUGH TUESDAY NIGHT...East to southeast winds
near 10 knots. Seas around 1 foot. Nearshore waters a light chop.
Scattered showers and isolated thunderstorms.

$$

GMZ042>044-210830-
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-
1034 PM EDT Thu Jul 20 2017

.OVERNIGHT...Variable winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers and
thunderstorms.
.FRIDAY...Variable winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers and
thunderstorms.
.FRIDAY NIGHT...Southeast winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers.
.SATURDAY...Southeast winds near 10 knots. Seas around 1 foot.
Nearshore waters a light chop. Isolated showers.
.SATURDAY NIGHT AND SUNDAY...East to southeast winds near 10
knots. Seas around 1 foot. Nearshore waters a light chop. Isolated
showers.
.SUNDAY NIGHT THROUGH TUESDAY NIGHT...East to southeast
winds 10 to 15 knots. Seas 1 to 3 feet. Nearshore waters a light
to moderate chop. Scattered showers and isolated thunderstorms.

$$

GMZ052>055-072>075-210830-
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-
1034 PM EDT Thu Jul 20 2017

.OVERNIGHT...Variable winds 5 to 10 knots. Seas 1 to 2 feet.
Isolated showers and thunderstorms.
.FRIDAY...Southeast winds 5 to 10 knots. Seas 1 to 2 feet.
Isolated showers and thunderstorms.
.FRIDAY NIGHT...East to southeast winds increasing to 10 to 15
knots. Seas building to 2 to 3 feet. Isolated showers.
.SATURDAY AND SATURDAY NIGHT...East to southeast winds 10 to 15
knots. Seas 2 to 3 feet. Isolated showers.
.SUNDAY...East winds near 10 knots. Seas 2 to 3 feet. Isolated
showers and thunderstorms.
.SUNDAY NIGHT THROUGH TUESDAY NIGHT...East to southeast winds 10
to 15 knots. Seas 2 to 4 feet. Scattered showers and isolated
thunderstorms.

$$

GMZ033-034-210830-
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-
1034 PM EDT Thu Jul 20 2017

.OVERNIGHT...Variable winds near 5 knots. Seas 1 foot or less.
Isolated showers and thunderstorms.
.FRIDAY...Variable winds near 5 knots. Seas 1 foot or less.
Isolated showers and thunderstorms.
.FRIDAY NIGHT...Southeast winds near 5 knots. Seas 1 foot or
less. Isolated showers.
.SATURDAY...Southeast to south winds 5 to 10 knots. Seas 1 to
2 feet. Isolated showers.
.SATURDAY NIGHT...East to southeast winds 5 to 10 knots. Seas
1 to 2 feet. Isolated showers.
.SUNDAY...East to southeast winds near 10 knots. Seas 1 to 3
feet. Isolated showers and thunderstorms.
.SUNDAY NIGHT THROUGH TUESDAY NIGHT...East to southeast winds near
10 knots. Seas 1 to 3 feet. Scattered showers and isolated
thunderstorms.

$$



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