Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 270829
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
429 AM EDT Fri Apr 27 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.

GMZ005-271430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
429 AM EDT Fri Apr 27 2018

.SYNOPSIS...A subtle trough will lie near our entire area today
and into tonight. Thereafter, a weak area of high pressure will
nose into our region from the Gulf of Mexico this weekend.
Thereafter, a strengthening area of high pressure over the
Southeastern United States will slide into the Western Atlantic
Ocean with a ridge extending westward.

The Approximate Shoreward Edge of the Gulf Stream as of
April 26, 2018...

22 NM South of Dry Tortugas Light...on Loggerhead Key.
19 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
20 NM South of Sand Key Light...off Key West.
31 NM South of Looe Key...off Big Pine Key.
31 NM South of Sombrero Key Light...off Marathon.
17 NM Southeast of Alligator Reef Light...off Islamorada.
13 NM Southeast of Molasses Reef Light...off Key Largo.
10 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic
Office.

$$

GMZ031-271430-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
429 AM EDT Fri Apr 27 2018

.TODAY...Mainly south winds 5 to 10 knots, becoming southwest to
west near 10 knots. Bay waters mainly a light chop. Winds higher
and bay waters rough near developing numerous showers and
scattered thunderstorms especially this afternoon.
.TONIGHT...West to northwest winds near 10 knots. Bay waters a
light chop. Winds and seas higher near numerous showers and
scattered thunderstorms mainly before midnight.
.SATURDAY...Northwest to north winds near 10 knots. Bay waters
a light chop. Isolated showers early.
.SATURDAY NIGHT...Northwest winds near 10 knots. Bay waters a
light chop. Isolated showers.
.SUNDAY...Variable winds 5 to 10 knots. Bay waters smooth to a
light chop. Isolated showers.
.SUNDAY NIGHT...Winds becoming east and increasing to near 15
knots late. Bay waters becoming a moderate chop. Isolated
showers.
.MONDAY...East winds 15 to 20 knots. Bay waters choppy. Isolated
showers.
.MONDAY NIGHT...East winds near 20 knots. Bay waters rough.
Isolated showers.
.TUESDAY...East winds 15 to 20 knots. Bay waters choppy. Isolated
showers.
.TUESDAY NIGHT...East winds near 20 knots. Bay waters rough.
Isolated showers.

$$

GMZ032-035-271430-
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-
429 AM EDT Fri Apr 27 2018

.TODAY...South winds 5 to 10 knots, becoming southwest to west
near 10 knots. Seas 1 foot or less. Nearshore waters becoming a
light chop. Winds and seas higher near developing numerous showers
and scattered thunderstorms especially this afternoon.
.TONIGHT...West winds near 10 knots. Seas 1 to 2 feet. Nearshore
waters a light chop. Winds and seas higher near numerous showers
and scattered thunderstorms mainly before midnight.
.SATURDAY...Northwest to north winds near 10 knots. Seas around 1
foot. Nearshore waters a light chop. Isolated showers early.
.SATURDAY NIGHT...Northwest to north winds near 10 knots. Seas
1 to 2 feet. Nearshore waters a light chop. Isolated showers.
.SUNDAY...Northwest to north winds 5 to 10 knots. Seas around 1
foot. Nearshore waters smooth to a light chop. Isolated showers.
.SUNDAY NIGHT...Winds becoming east and increasing to near 15
knots. Seas 1 to 2 feet. Nearshore waters becoming a moderate
chop. Isolated showers.
.MONDAY...East winds 15 to 20 knots. Seas 1 to 3 feet. Nearshore
waters choppy. Isolated showers.
.MONDAY NIGHT...East winds near 20 knots. Seas 2 to 3 feet.
Nearshore waters rough. Isolated showers.
.TUESDAY...East winds 15 to 20 knots. Seas 1 to 3 feet. Nearshore
waters choppy. Isolated showers.
.TUESDAY NIGHT...East winds near 20 knots. Seas 2 to 3 feet.
Nearshore waters rough. Isolated showers.

$$

GMZ042>044-271430-
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-
429 AM EDT Fri Apr 27 2018

.TODAY...Mainly south winds 5 to 10 knots, becoming southwest to west
near 10 knots. Seas around 1 foot. Nearshore waters a light chop.
Winds and seas higher near developing numerous showers and
scattered thunderstorms especially this afternoon.
.TONIGHT...West to northwest winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Winds and seas higher near
numerous showers and scattered thunderstorms mainly before
midnight.
.SATURDAY...Northwest to north winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers early.
.SATURDAY NIGHT...Northwest to north winds near 10 knots. Seas 1
to 2 feet. Nearshore waters a light chop. Isolated showers.
.SUNDAY...North winds 5 to 10 knots. Seas around 1 foot.
Nearshore waters smooth to a light chop. Isolated showers.
.SUNDAY NIGHT...Winds becoming east and increasing to near 15
knots. Seas building to 2 to 3 feet. Nearshore waters becoming
a moderate chop. Isolated showers.
.MONDAY...East winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore
waters choppy. Isolated showers.
.MONDAY NIGHT THROUGH TUESDAY NIGHT...East winds near 20 knots.
Seas 3 to 5 feet. Nearshore waters rough. Isolated showers.

$$

GMZ052>055-072>075-271430-
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-
429 AM EDT Fri Apr 27 2018

.TODAY...South to southwest winds near 10 knots, becoming mainly
west. Seas 1 to 3 feet. Winds and seas higher near developing
numerous showers and scattered thunderstorms.
.TONIGHT...West to northwest winds near 10 knots. Seas 1 to 3
feet. Winds and seas higher near numerous showers and scattered
thunderstorms mainly before midnight.
.SATURDAY...Northwest to north winds near 10 knots. Seas 1 to 3
feet. Isolated showers early.
.SATURDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.SUNDAY...North to northeast winds 5 to 10 knots. Seas 1 to 2
feet. Isolated showers.
.SUNDAY NIGHT...Winds becoming east near 15 knots. Seas building
to 3 to 4 feet. Isolated showers.
.MONDAY...East winds 15 to 20 knots. Seas 3 to 5 feet, building
to 4 to 6 feet. Isolated showers.
.MONDAY NIGHT...East winds 20 to 25 knots. Seas 5 to 7 feet,
building to 6 to 9 feet. Isolated showers.
.TUESDAY AND TUESDAY NIGHT...East winds near 20 knots. Seas 5 to 8
feet. Isolated showers.

$$

GMZ033-034-271430-
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-
429 AM EDT Fri Apr 27 2018

.TODAY...South to southwest winds 5 to 10 knots, becoming
variable near 10 knots. Seas 1 to 2 feet. Winds and seas higher
near developing numerous showers and scattered thunderstorms
especially this afternoon.
.TONIGHT...Northwest to north winds near 10 knots. Seas 1 to 2
feet. Winds and seas higher near numerous showers and scattered
thunderstorms mainly before midnight.
.SATURDAY...Northwest north winds 10 to 15 knots. Seas 2 to 3
feet. Isolated showers early.
.SATURDAY NIGHT...North winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.SUNDAY...North winds near 10 knots. Seas 1 to 3 feet. Isolated
showers.
.SUNDAY NIGHT...Winds becoming east at 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
.MONDAY...East winds 15 to 20 knots. Seas building to 3 to 5
feet. Isolated showers.
.MONDAY NIGHT...East winds near 20 knots. Seas 4 to 6 feet.
Isolated showers.
.TUESDAY...East winds 15 to 20 knots. Seas 3 to 5 feet. Isolated
showers.
.TUESDAY NIGHT...East winds near 20 knots. Seas 4 to 6 feet.
Isolated showers.

$$


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