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Hazardous marine condition(s):
Small Craft Advisory
Hazardous Weather Outlook
GMZ005-190830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1019 PM EDT Thu Apr 18 2019
.SYNOPSIS...A cold front currently over the Mississippi River
valley will slide east across the Gulf of Mexico overnight and
Friday. This front will push through the coastal waters of the
Keys Friday evening. Fresh to strong southeast to south breezes
overnight will turn to the south and southwest Friday. Breezes
will shift to the northwest after the frontal passage. High
pressure will spill southeast into the Gulf of Mexico Saturday,
then slowly build northeast into the Southeastern United States by
Monday or Tuesday. Over the Keys waters, breezes will diminish
Saturday and Saturday night, followed by freshening northeast to
east breezes Monday and Monday night.
The Approximate Shoreward Edge of the Gulf Stream as of
April 18...
30 NM South of Dry Tortugas Light...on Loggerhead Key.
8 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
7 NM South of Sand Key Light...off Key West.
11 NM South of Looe Key...off Big Pine Key.
11 NM South of Sombrero Key Light...off Marathon.
4 NM Southeast of Alligator Reef Light...off Islamorada.
2 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 Naval Oceanographic Office.
$$
GMZ042>044-190830- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- 1019 PM EDT Thu Apr 18 2019 SMALL CRAFT ADVISORY IN EFFECT OVERNIGHT Southeast winds near 20 knots, becoming southeast to south. Seas 2 to 4 feet, building to 3 to 5 feet after midnight. Nearshore waters rough. Isolated showers late this evening, then scattered showers and isolated thunderstorms after midnight. FRIDAY South winds near 20 knots. Seas 3 to 4 feet. Nearshore waters rough. Scattered showers and isolated thunderstorms in the morning, then scattered showers and thunderstorms in the afternoon. FRIDAY NIGHT Southwest winds 20 to 25 knots, becoming west to northwest and decreasing to near 20 knots. Seas 3 to 4 feet, except 4 to 6 feet west of Cosgrove Shoal Light. Nearshore waters very rough, becoming rough. Widespread showers and scattered thunderstorms in the evening, then isolated showers after midnight. SATURDAY West to northwest winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 3 feet, except 4 to 6 feet west of Cosgrove Shoal Light due to west swells. Nearshore waters choppy, becoming a moderate chop. Isolated showers, especially in the morning. SATURDAY NIGHT Northwest winds 10 to 15 knots, becoming north. Seas 1 to 3 feet. West of Cosgrove Shoal Light, seas 4 to 5 feet due to west swells. Nearshore waters a light to moderate chop. SUNDAY Northeast winds near 10 knots. Seas 1 to 3 feet due to variable swells. Nearshore waters a light chop. SUNDAY NIGHT Northeast to east winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. MONDAY Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. MONDAY NIGHT THROUGH TUESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. Isolated showers. $$
GMZ042>044-190830- 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- 1019 PM EDT Thu Apr 18 2019 SMALL CRAFT ADVISORY IN EFFECT OVERNIGHT Southeast winds near 20 knots, becoming southeast to south. Seas 2 to 4 feet, building to 3 to 5 feet after midnight. Nearshore waters rough. Isolated showers late this evening, then scattered showers and isolated thunderstorms after midnight. FRIDAY South winds near 20 knots. Seas 3 to 4 feet. Nearshore waters rough. Scattered showers and isolated thunderstorms in the morning, then scattered showers and thunderstorms in the afternoon. FRIDAY NIGHT Southwest winds 20 to 25 knots, becoming west to northwest and decreasing to near 20 knots. Seas 3 to 4 feet, except 4 to 6 feet west of Cosgrove Shoal Light. Nearshore waters very rough, becoming rough. Widespread showers and scattered thunderstorms in the evening, then isolated showers after midnight. SATURDAY West to northwest winds 15 to 20 knots, decreasing to near 15 knots. Seas 2 to 3 feet, except 4 to 6 feet west of Cosgrove Shoal Light due to west swells. Nearshore waters choppy, becoming a moderate chop. Isolated showers, especially in the morning. SATURDAY NIGHT Northwest winds 10 to 15 knots, becoming north. Seas 1 to 3 feet. West of Cosgrove Shoal Light, seas 4 to 5 feet due to west swells. Nearshore waters a light to moderate chop. SUNDAY Northeast winds near 10 knots. Seas 1 to 3 feet due to variable swells. Nearshore waters a light chop. SUNDAY NIGHT Northeast to east winds near 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop. MONDAY Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. MONDAY NIGHT THROUGH TUESDAY NIGHT Northeast to east winds 15 to 20 knots. Seas 2 to 4 feet. Nearshore waters choppy. Isolated showers. $$