Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 192049
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
449 PM EDT Thu Apr 19 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.

GMZ005-200230-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
449 PM EDT Thu Apr 19 2018

.SYNOPSIS...A ridge of high pressure will move away to the east
tonight. A trough of low pressure will move southward across the
Florida Peninsula and eastern Gulf of Mexico, before dissipating
near the Florida keys on Friday. Thereafter, a high pressure area
over the eastern United States will shift over the western North
Atlantic Ocean.

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

22 NM South of Dry Tortugas Light, on Loggerhead Key.
30 NM South of Cosgrove Shoal Light, off the Marquesas Keys.
35 NM South of Sand Key Light, off Key West.
40 NM South of Looe Key, off Big Pine Key.
40 NM South of Sombrero Key Light, off Marathon.
18 NM Southeast of Alligator Reef Light, off Islamorada.
11 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.

$$

GMZ031-200230-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
449 PM EDT Thu Apr 19 2018

.TONIGHT...Variable winds near 5 knots. Bay waters smooth.
.FRIDAY...Variable winds 5 to 10 knots. Bay waters smooth to a
light chop.
.FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Bay waters
a light to moderate chop. Isolated showers.
.SATURDAY...East winds 10 to 15 knots. Bay waters a light to
moderate chop. Isolated showers.
.SATURDAY NIGHT...East to southeast winds near 15 knots. Bay
waters a moderate chop. Isolated showers.
.SUNDAY...Southeast winds 10 to 15 knots. Bay waters a light to
moderate chop. Isolated showers.
.SUNDAY NIGHT...Southeast to south winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers.
.MONDAY...South winds 10 to 15 knots, becoming southwest in the
afternoon. Bay waters a light to moderate chop. Isolated showers.
.MONDAY NIGHT...Southwest to west winds near 10 knots. Bay waters
a light chop. Isolated showers.
.TUESDAY...Southwest winds 10 to 15 knots. Bay waters a light to
moderate chop. Scattered showers.
.TUESDAY NIGHT...Northwest winds 5 to 10 knots. Bay waters smooth
to a light chop. Isolated showers.

$$

GMZ032-035-200230-
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-
449 PM EDT Thu Apr 19 2018

.TONIGHT...North to northeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop.
.FRIDAY...North to northeast winds 5 to 10 knots. Seas 1 foot or
less. Nearshore waters smooth to a light chop.
.FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.SATURDAY...East winds 10 to 15 knots. Seas 1 to 2 feet. Nearshore
waters a light to moderate chop. Isolated showers.
.SATURDAY NIGHT...East to southeast winds near 15 knots. Seas 1 to
2 feet. Nearshore waters a moderate chop. Isolated showers.
.SUNDAY...Southeast winds 10 to 15 knots. Seas around 1 foot.
Nearshore waters a light to moderate chop. Isolated showers.
.SUNDAY NIGHT...Southeast to south winds 10 to 15 knots. Seas
around 1 foot. Nearshore waters a light to moderate chop. Isolated
showers.
.MONDAY...South winds 10 to 15 knots, becoming southwest. Seas
around 1 foot. Nearshore waters a light to moderate chop. Isolated
showers.
.MONDAY NIGHT...Southwest to west winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.TUESDAY...Southwest to west winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Scattered
showers.
.TUESDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
1 foot or less. Nearshore waters a light to moderate chop.
Isolated showers.

$$

GMZ042>044-200230-
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-
449 PM EDT Thu Apr 19 2018

.TONIGHT...Variable winds 5 to 10 knots. Seas less than 1 foot.
Nearshore waters smooth to a light chop.
.FRIDAY...Northeast winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop.
.FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.SATURDAY...East winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.SATURDAY NIGHT...East to southeast winds near 15 knots. Seas 2 to
3 feet. Nearshore waters a moderate chop. Isolated showers.
.SUNDAY...Southeast winds 10 to 15 knots. Seas around 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.SUNDAY NIGHT...Southeast to south winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.MONDAY...South winds 10 to 15 knots, becoming southwest. Seas
around 2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.MONDAY NIGHT...Southwest to west winds 10 to 15 knots. Seas
around 2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.TUESDAY...Southwest to west winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Scattered
showers.
.TUESDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. Isolated
showers.

$$

GMZ052>055-072>075-200230-
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-
449 PM EDT Thu Apr 19 2018

.TONIGHT...North to northeast winds near 5 to 10 knots, becoming
variable. Seas 1 to 3 feet.
.FRIDAY...Northeast winds 10 to 15 knots. Seas 2 to 4 feet.
.FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 2 to
4 feet. Isolated showers.
.SATURDAY...East winds near 15 knots. Seas 3 to 5 feet. Isolated
showers.
.SATURDAY NIGHT...East to southeast winds 15 to 20 knots. Seas 4
to 6 feet. Isolated showers.
.SUNDAY...Southeast winds near 15 knots. Seas 3 to 5 feet.
Isolated showers.
.SUNDAY NIGHT...Southeast to south winds near 15 knots. Seas 3 to
5 feet. Isolated showers.
.MONDAY...South winds 10 to 15 knots, becoming southwest. Seas 2
to 4 feet. Isolated showers.
.MONDAY NIGHT...Southwest to west winds 10 to 15 knots. Seas 2 to
4 feet. Isolated showers.
.TUESDAY...Southwest to west winds 10 to 15 knots. Seas 1 to
3 feet. Scattered showers.
.TUESDAY NIGHT...Northwest winds 10 to 15 knots. Seas 1 to
3 feet. Isolated showers.

$$

GMZ033-034-200230-
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-
449 PM EDT Thu Apr 19 2018

.TONIGHT...North to northeast winds 5 to 10 knots. Seas 1 to
2 feet.
.FRIDAY...Northeast winds near 10 knots. Seas around 2 feet.
.FRIDAY NIGHT...Northeast to east winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
.SATURDAY...East winds 10 to 15 knots. Seas 2 to 3 feet. Isolated
showers.
.SATURDAY NIGHT...East to southeast winds near 15 knots. Seas 2 to
4 feet. Isolated showers.
.SUNDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.SUNDAY NIGHT...Southeast to south winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
.MONDAY...South winds 10 to 15 knots, becoming southwest in the
afternoon. Seas 2 to 3 feet. Isolated showers.
.MONDAY NIGHT...Southwest to west winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
.TUESDAY...West winds 10 to 15 knots. Seas 1 to 3 feet. Scattered
showers.
.TUESDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
2 to 3 feet. Isolated showers.

$$

KN



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