GMZ005-141530-
 Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
 1026 PM EST Tue Jan 13 2026
 
 
 .SYNOPSIS...A split surface ridge stretching across the Northern
 Gulf and southeast Atlantic will weaken further overnight as it
 shifts further southeastwards into South Florida. This will keep
 breezes quite light with increasing variability. Thereafter, a
 trough will swing across our area on Wednesday, briefly clocking
 winds around to the southeast, then southwest, and eventually
 west to northwest. This will be followed by a pre-frontal trough
 and a beefy cold front on Thursday. Winds are expected to shift
 northwest, becoming strong and potentially near gale breezes.
 Small Craft Advisories are becoming increasingly likely, beginning
 Wednesday night or Thursday.
 
 The Approximate Shoreward Edge of the Gulf Stream as of January
 12...
 
 19 NM South of Dry Tortugas Light...on Loggerhead Key.
 13 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 15 NM South of Sand Key Light...off Key West.
 17 NM South of Looe Key...off Big Pine Key.
 17 NM Southeast of Sombrero Key Light...off Marathon.
 15 NM Southeast of Alligator Reef Light...off Islamorada.
 10 NM Southeast of Molasses Reef Light...off Key Largo.
 5 NM Southeast of Carysfort Reef Light...off Ocean Reef.
 
 Gulf Stream Information Courtesy of the National Weather Service in
 Key West based on products from NASA SPoRT and RTOFS.
 
 $$




 
 GMZ052>055-072>075-141530-
 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-
 1026 PM EST Tue Jan 13 2026
 

 OVERNIGHT
 Northeast to east winds 5 to 10 knots, becoming
 southeast to south. Seas around 2 feet. Wave Detail: East 2 feet
 at 6 seconds and northwest 2 feet at 6 seconds. Isolated showers
 and thunderstorms.

 WEDNESDAY
 South to southwest winds near 10 knots, becoming west
 to northwest 10 to 15 knots. Seas 1 to 2 feet, building to 2 to 3
 feet. Wave Detail: East to southeast 2 feet at 5 seconds and
 northwest 1 foot at 5 seconds. Scattered showers and isolated
 thunderstorms.

 WEDNESDAY NIGHT
 West to northwest winds 10 to 15 knots. Seas
 1 to 2 feet. Wave Detail: West to northwest 2 feet at 3 seconds
 and east 1 foot at 5 seconds. Scattered showers and isolated
 thunderstorms.

 THURSDAY
 West winds near 20 knots, becoming northwest 25 to 30
 knots. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to
 8 feet, occasionally to 10 feet. Scattered showers and isolated
 thunderstorms.

 THURSDAY NIGHT
 Northwest to north winds near 25 knots,
 decreasing to 20 to 25 knots. Seas 5 to 8 feet, occasionally to
 10 feet. Isolated showers.

 FRIDAY
 North to northeast winds near 20 knots, becoming 10 to
 15 knots. Seas 4 to 6 feet, occasionally to 8 feet, subsiding to
 3 to 5 feet, occasionally to 7 feet.

 FRIDAY NIGHT
 Northeast winds 10 to 15 knots, decreasing to near 10
 knots. Seas 3 to 5 feet, occasionally to 6 feet, subsiding to 2
 to 4 feet, occasionally to 5 feet. Isolated showers.

 SATURDAY
 North to northeast winds 10 to 15 knots. Seas 2 to
 4 feet, occasionally to 5 feet.

 SATURDAY NIGHT
 North winds 10 to 15 knots. Seas 2 to 4 feet,
 occasionally to 5 feet. Isolated showers.

 SUNDAY
 North winds 15 to 20 knots. Seas 3 to 5 feet,
 occasionally to 6 feet. Isolated showers.

 SUNDAY NIGHT
 North winds near 20 knots. Seas 4 to 6 feet,
 occasionally to 8 feet.
 
 $$