Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 220235
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
1035 PM EDT Sat Apr 21 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.

GMZ005-220830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1035 PM EDT Sat Apr 21 2018

.SYNOPSIS...An expansive area of high pressure covering the entire
Eastern United States will slide into the western North Atlantic
Ocean over the next several days, as a weak area of low pressure
migrates eastward and across the Southeast United States before
lifting up the Eastern Seaboard next week.

The Approximate Shoreward Edge of the Gulf Stream as of
April 21, 2018...

17 NM South of Dry Tortugas Light...on Loggerhead Key.
16 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
21 NM South of Sand Key Light...off Key West.
32 NM South of Looe Key...off Big Pine Key.
36 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.
 8 NM East of Carysfort Reef Light...off Ocean Reef.

Gulf Stream Information Courtesy of the Naval Oceanographic
Office.

$$

GMZ031-220830-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
1035 PM EDT Sat Apr 21 2018

.OVERNIGHT...East winds near 15 knots. Bay waters a moderate
chop. Isolated showers.
.SUNDAY AND SUNDAY NIGHT...East to southeast winds 10 to 15
knots. Bay waters a light to moderate chop. Isolated showers.
.MONDAY...Southeast winds 10 to 15 knots. Bay waters a light to
moderate chop. Isolated showers.
.MONDAY NIGHT...Southeast to south winds 10 to 15 knots. Bay
waters a light to moderate chop. Isolated showers.
.TUESDAY...South to southwest winds near 10 knots. Bay waters a
light chop. Isolated showers.
.TUESDAY NIGHT...West to northwest winds 10 to 15 knots. Bay
waters a light to moderate chop. Scattered showers and isolated
thunderstorms.
.WEDNESDAY...West to northwest winds 10 to 15 knots. Bay waters a
light to moderate chop. Isolated showers.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 knots. Bay waters a
light to moderate chop. Isolated showers.
.THURSDAY...Northwest to north winds 5 to 10 knots, becoming west
in the afternoon. Bay waters smooth to a light chop. Isolated
showers.
.THURSDAY NIGHT...West to northwest winds 5 to 10 knots. Bay
waters smooth to a light chop. Isolated showers.

$$

GMZ032-035-220830-
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-
1035 PM EDT Sat Apr 21 2018

.OVERNIGHT...East winds 10 to 15 knots, increasing to near 15
knots late. Seas 1 to 2 feet. Nearshore waters a light to moderate
chop. Isolated showers.
.SUNDAY AND SUNDAY NIGHT...East to southeast winds 10 to 15
knots. Seas 1 to 2 feet. Nearshore waters a light to moderate
chop. Isolated showers.
.MONDAY...Southeast winds near 10 knots. Seas 1 to 2 feet
Nearshore waters a light chop. Isolated showers.
.MONDAY NIGHT...Southeast to south winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Isolated showers.
.TUESDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Isolated showers.
.TUESDAY NIGHT...West to northwest winds near 10 knots. Seas 1 to
2 feet. Nearshore waters a light chop. Scattered showers and
isolated thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...Northwest winds 10 to 15 knots.
Seas 1 to 2 feet. Nearshore waters a light to moderate chop.
Isolated showers.
.THURSDAY AND THURSDAY NIGHT...Northwest winds 5 to 10 knots,
becoming west in the afternoon. Seas 1 foot or less. Nearshore
waters smooth to a light chop. Isolated showers.

$$

GMZ042>044-220830-
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-
1035 PM EDT Sat Apr 21 2018

.OVERNIGHT...East winds near 15 knots late. Seas 2 to 3 feet.
Nearshore waters a moderate chop. Isolated showers.
.SUNDAY AND SUNDAY NIGHT...East to southeast winds 10 to 15
knots. Seas 2 to 3 feet. Nearshore waters a light to moderate
chop. Isolated showers.
.MONDAY THROUGH TUESDAY...Southeast winds 10 to 15 knots. Seas 1
to 3 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.TUESDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
1 to 3 feet. Nearshore waters a light to moderate chop. Scattered
showers and isolated thunderstorms.
.WEDNESDAY...Northwest winds near 10 knots. Seas 1 to 3 feet.
Nearshore waters a light chop. Isolated showers.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 knots. Seas 1 to
3 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.THURSDAY...West to northwest winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.THURSDAY NIGHT...Northwest winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.

$$

GMZ052>055-072>075-220830-
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-
1035 PM EDT Sat Apr 21 2018

...SMALL CRAFT SHOULD EXERCISE CAUTION FOR INCREASING WINDS...

.OVERNIGHT...East winds near 15 knots, increasing to 15 to 20
knots late. Seas building to 3 to 5 feet. Isolated showers.
.SUNDAY...East winds near 15 knots. Seas 3 to 5 feet. Isolated
showers.
.SUNDAY NIGHT...East to southeast winds near 15 knots. Seas 3 to
5 feet. Isolated showers.
.MONDAY...Southeast winds 10 to 15 knots. Seas 2 to 4 feet.
Isolated showers.
.MONDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.TUESDAY...Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Isolated showers.
.TUESDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
2 to 3 feet. Scattered showers and isolated thunderstorms.
.WEDNESDAY...Northwest winds near 10 knots. Seas 2 to 3 feet.
Isolated showers.
.WEDNESDAY NIGHT...Northwest to north winds 10 to 15 knots. Seas
2 to 3 feet. Isolated showers.
.THURSDAY...West to northwest winds near 10 knots. Seas 2 to
3 feet. Isolated showers.
.THURSDAY NIGHT...Northwest winds near 10 knots. Seas 1 to 2
feet. Isolated showers.

$$

GMZ033-034-220830-
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-
1035 PM EDT Sat Apr 21 2018

.OVERNIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet.
Isolated showers.
.SUNDAY...East to southeast winds 10 to 15 knots. Seas 1 to
3 feet. Isolated showers.
.SUNDAY NIGHT...East to southeast winds near 15 knots. Seas 2 to
3 feet. Isolated showers.
.MONDAY...Southeast to south winds near 10 knots. Seas 1 to 2
feet. Isolated showers.
.MONDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas
1 foot or less. Isolated showers.
.TUESDAY...Southwest to west winds 5 to 10 knots. Seas 1 to
2 feet. Isolated showers.
.TUESDAY NIGHT...Northwest winds 10 to 15 knots. Seas 2 to 3
feet, building to 3 to 4 feet after midnight. Scattered showers
and isolated thunderstorms.
.WEDNESDAY AND WEDNESDAY NIGHT...Northwest winds near 10 knots.
Seas 2 to 4 feet. Isolated showers.
.THURSDAY...West to northwest winds near 10 knots. Seas 2 to 3
feet. Isolated showers.
.THURSDAY NIGHT...Northwest winds near 10 knots. Seas 2 to 3
feet. Isolated showers.

$$



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