GMZ005-182130-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1019 AM EDT Tue Mar 18 2025
.SYNOPSIS...Fresh to strong north to northeast breezes will
slacken to moderate to fresh this afternoon. High pressure in the
Gulf will slide eastward towards the western North Atlantic this
afternoon, allowing breezes to slacken back to gentle to moderate
and gradually veer to east to southeast tonight through
Wednesday. Another cold front will push through the marine zones
Thursday night, with freshened breezes expected once again in its
wake through the end of the work week. Behind this front, yet
another area of high pressure will settle in the southeast CONUS
slackening breezes before the start of the weekend.
The Approximate Shoreward Edge of the Gulf Stream as of March 15...
14 NM South of Dry Tortugas Light...on Loggerhead Key.
3 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
1 NM South of Sand Key Light...off Key West.
4 NM South of Looe Key...off Big Pine Key.
5 NM South of Sombrero Key Light...off Marathon.
5 NM Southeast of Alligator Reef Light...off Islamorada.
4 NM Southeast of Molasses Reef Light...off Key Largo.
2 NM East of Carysfort Reef Light...off Ocean Reef.
Gulf Stream Information Courtesy of the National Weather Service in Key
West based on products from the Real Time Ocean Forecast System and
NASA SPoRT.
$$
GMZ032-035-182130-
Bayside and Gulfside from Craig Key to west end of Seven Mile
Bridge-
Gulf of America from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
1019 AM EDT Tue Mar 18 2025
SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL WINDS DECREASE
THIS AFTERNOON
North to northeast winds 15 to 20 knots,
becoming northeast 10 to 15 knots. Seas 3 to 5 feet, occasionally
to 6 feet. West of the Marquesas Keys, seas 6 to 7 feet,
occasionally to 9 feet, subsiding to 4 to 6 feet, occasionally to
8 feet. Nearshore waters choppy, becoming a light to moderate
chop.
TONIGHT
Northeast to east winds near 15 knots, decreasing to
10 to 15 knots. Seas 1 to 2 feet. Nearshore waters a moderate
chop, becoming a light to moderate chop.
WEDNESDAY
Northeast to east winds near 10 knots, becoming east
to southeast. Seas 1 to 2 feet. Nearshore waters a light chop.
WEDNESDAY NIGHT
East to southeast winds 5 to 10 knots. Seas
1 foot or less. Nearshore waters smooth to a light chop.
THURSDAY
Southeast to south winds 5 to 10 knots, becoming
southwest to west. Seas around 1 foot. Nearshore waters smooth to
a light chop.
THURSDAY NIGHT
West to northwest winds 10 to 15 knots,
becoming northwest to north and increasing to 20 to 25 knots.
Seas 1 to 2 feet, building to 2 to 4 feet, occasionally to 5 feet.
Nearshore waters a light to moderate chop, becoming very rough.
Isolated showers.
FRIDAY
North winds 20 to 25 knots, becoming northeast to east
and decreasing to 10 to 15 knots. Seas 3 to 5 feet, occasionally
to 6 feet. West of the Marquesas Keys, seas 6 to 7 feet,
occasionally to 9 feet, subsiding to 4 to 5 feet, occasionally to
6 feet in the afternoon. Nearshore waters very rough, becoming a
light to moderate chop.
FRIDAY NIGHT
Northeast to east winds 10 to 15 knots, becoming
east. Seas 2 to 3 feet. Nearshore waters a light to moderate
chop.
SATURDAY
East to southeast winds near 10 knots. Seas 1 to 2
feet. Nearshore waters a light chop.
SATURDAY NIGHT
Northeast to east winds 5 to 10 knots. Seas 1
to 2 feet. Nearshore waters smooth to a light chop.
$$
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