Coastal Waters Forecast
Issued by NWS

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FZUS52 KKEY 210825
CWFKEY

Coastal Waters Forecast for the Florida Keys
National Weather Service Key West FL
425 AM 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.

GMZ005-211430-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
425 AM 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 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.

$$

GMZ031-211430-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
425 AM EDT Sat Apr 21 2018

.TODAY...East winds increasing to near 10 knots. Bay waters
becoming a light chop.
.TONIGHT...East winds near 15 knots. Bay waters a moderate chop.
Isolated showers.
.SUNDAY...East to southeast winds 10 to 15 knots. Bay waters a
light to moderate chop. Isolated showers.
.SUNDAY NIGHT...East to southeast winds near 15 knots. Bay waters
a moderate chop. Isolate showers.
.MONDAY...Southeast winds near 10 knots. Bay waters a light chop.
Isolated showers.
.MONDAY NIGHT...South winds 5 to 10 knots. Bay waters smooth to a
light chop. Isolated showers.
.TUESDAY...Southwest to west winds 5 to 10 knots. Bay waters
smooth to a light chop. Isolated showers.
.TUESDAY NIGHT...West winds near 10 knots. Bay waters a light
chop. Scattered showers and isolated thunderstorms.
.WEDNESDAY...West 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.

$$

GMZ032-035-211430-
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-
425 AM EDT Sat Apr 21 2018

.TODAY...Northeast to east winds 5 to 10 knots, becoming east and
increasing to near 10 knots. Seas around 1 foot. Nearshore waters
becoming a light chop.
.TONIGHT...East winds near 15 knots. Seas 1 to 2 feet. Nearshore
waters a moderate chop. Isolated showers.
.SUNDAY...East to southeast winds 10 to 15 knots. Seas 1 to 2 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.SUNDAY NIGHT...East to southeast winds near 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.MONDAY...Southeast to south winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Isolated showers.
.MONDAY NIGHT...South winds 5 to 10 knots. Seas 1 foot or less.
Nearshore waters smooth to a light chop. Isolated showers.
.TUESDAY...Southwest to west 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
around 1 foot. Nearshore waters a light chop. Scattered showers
and isolated thunderstorms.
.WEDNESDAY...West to northwest winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.

$$

GMZ042>044-211430-
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-
425 AM EDT Sat Apr 21 2018

.TODAY...East winds near 10 knots, increasing to 10 to 15 knots
late. Seas building to 1 to 2 feet. Nearshore waters mainly a
light chop.
.TONIGHT...East winds near 15 knots. Seas 2 to 3 feet. Nearshore
waters a moderate chop. Isolated showers.
.SUNDAY...East winds near 15 knots. Seas 2 to 3 feet. Nearshore
waters a moderate chop. Isolated showers.
.SUNDAY NIGHT...Southeast winds near 15 knots. Seas 2 to 3 feet.
Nearshore waters a moderate chop. Isolated showers.
.MONDAY...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
Nearshore waters a light to moderate chop. Isolated showers.
.MONDAY NIGHT...South winds near 10 knots. Seas 1 to 2 feet.
Nearshore waters a light chop. Isolated showers.
.TUESDAY...Southwest to west winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop. Isolated showers.
.TUESDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
1 to 2 feet. Nearshore waters a light to moderate chop. Scattered
showers and isolated thunderstorms.
.WEDNESDAY...West to northwest winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 knots. Seas 1 to
2 feet. Nearshore waters a light to moderate chop. Isolated
showers.

$$

GMZ052>055-072>075-211430-
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-
425 AM EDT Sat Apr 21 2018

.TODAY...Northeast to east winds near 10 knots, increasing to 10
to 15 knots. Seas building to 2 to 4 feet.
.TONIGHT...East winds 15 to 20 knots. Seas 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 to south winds near 10 knots. Seas 1 to
3 feet. Isolated showers.
.TUESDAY...West winds near 10 knots. Seas 1 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...West to northwest winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.

$$

GMZ033-034-211430-
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-
425 AM EDT Sat Apr 21 2018

.TODAY...Northeast winds 5 to 10 knots, becoming east and
increasing to near 10 knots. Seas 1 to 2 feet.
.TONIGHT...East winds 10 to 15 knots. Seas 1 to 3 feet. Isolated
showers. .
.SUNDAY...East to southeast winds 10 to 15 knots. Seas 2 to
3 feet. Isolated showers.
.SUNDAY NIGHT...Southeast winds near 15 knots. Seas 2 to 3 feet.
Isolated showers.
.MONDAY...South winds 10 to 15 knots. Seas 1 to 2 feet. Isolated
showers.
.MONDAY NIGHT...South to southwest winds 5 to 10 knots. Seas
1 foot or less. Isolated showers.
.TUESDAY...Southwest to west winds 10 to 15 knots. Seas 1 to
2 feet. Isolated showers.
.TUESDAY NIGHT...West to northwest winds 10 to 15 knots. Seas
1 to 3 feet. Scattered showers and isolated thunderstorms.
.WEDNESDAY...West to northwest winds near 10 knots. Seas 1 to 3
feet. Isolated showers.
.WEDNESDAY NIGHT...Northwest winds near 10 knots. Seas 1 to
3 feet. Isolated showers.

$$



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