GMZ005-140845-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1031 PM EDT Thu Mar 13 2025
.SYNOPSIS...High pressure over the western North Atlantic will
keep shifting eastward tonight as it anchors across the central
North Atlantic and builds heading through the weekend. Breezes
will slacken to light to gentle with occasional variable periods
tonight and Friday. The Atlantic high will build over the Atlantic
while a strong surface low develops over the central United
States over the weekend. As a result, breezes will freshen Friday
night through Sunday. Cold frontal passage associated with this
low is expected sometime Sunday night or Monday,and another round
of fresh breezes is expected for early to mid next week.
The Approximate Shoreward Edge of the Gulf Stream as of March
8...
35 NM South of Dry Tortugas Light...on Loggerhead Key.
19 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
16 NM South of Sand Key Light...off Key West.
8 NM South of Looe Key...off Big Pine Key.
8 NM South of Sombrero Key Light...off Marathon.
7 NM Southeast of Alligator Reef Light...off Islamorada.
6 NM Southeast of Molasses Reef Light...off Key Largo.
3 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.
$$
GMZ042>044-140845-
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-
1031 PM EDT Thu Mar 13 2025
OVERNIGHT
Variable winds 5 to 10 knots, decreasing to near 5
knots. Seas 1 to 2 feet, subsiding to around 1 foot. West of
Cosgrove Shoal Light, seas 2 to 3 feet, subsiding to 1 to 2 feet.
Nearshore waters smooth.
FRIDAY
Northeast to east winds 5 to 10 knots, becoming east to
southeast in the afternoon. Seas 1 to 2 feet. Nearshore waters
smooth to a light chop.
FRIDAY NIGHT
East to southeast winds near 10 knots, increasing
to near 15 knots after midnight. Seas around 2 feet, building to
2 to 3 feet. Nearshore waters a light chop, becoming a moderate
chop. Isolated showers.
SATURDAY
Southeast winds 15 to 20 knots, increasing to near 20
knots. Seas 2 to 4 feet, occasionally to 5 feet, building to 3 to
5 feet, occasionally to 6 feet. Nearshore waters choppy, becoming
rough. Isolated showers.
SATURDAY NIGHT
Southeast winds near 20 knots. Seas 3 to 5
feet, occasionally to 6 feet. Nearshore waters rough. Isolated
showers.
SUNDAY
Southeast winds near 20 knots, decreasing to near 15
knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet,
subsiding to 3 to 4 feet, occasionally to 5 feet. Nearshore
waters rough, becoming a moderate chop. Isolated showers.
SUNDAY NIGHT
Southeast winds 10 to 15 knots, becoming south to
southwest after midnight. Seas 2 to 3 feet. Nearshore waters a
light to moderate chop. Scattered showers.
MONDAY
West to northwest winds 15 to 20 knots, becoming north
in the afternoon. Seas 1 to 2 feet. West of Cosgrove Shoal Light,
seas 2 to 3 feet, building to 4 to 5 feet, occasionally to 6
feet. Nearshore waters choppy. Scattered showers.
MONDAY NIGHT
North to northeast winds 15 to 20 knots, becoming
northeast and increasing to near 20 knots. Seas 2 to 3 feet,
except 4 to 6 feet, occasionally to 8 feet west of Cosgrove Shoal
Light. Nearshore waters choppy, becoming rough.
TUESDAY
Northeast to east winds near 20 knots. Seas 2 to
4 feet, occasionally to 5 feet, except 4 to 6 feet, occasionally
to 8 feet west of Cosgrove Shoal Light. Nearshore waters rough.
TUESDAY NIGHT
Northeast to east winds 15 to 20 knots. Seas
3 to 5 feet, occasionally to 6 feet. Nearshore waters choppy.
$$
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