GMZ005-120930-
 Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
 417 PM EST Thu Dec 11 2025
 
 
 .SYNOPSIS...As high pressure drifts eastward over the next
 several days and eventually into the western North Atlantic,
 north to northeast winds will clock around to the northeast to
 east. The next frontal boundary is progged to push through the
 Florida Keys marine zones on Sunday night. Ahead of the front,
 elevated chances for showers and thunderstorms will be possible
 late Saturday through early Sunday. In the wake of the frontal
 passage, fresh to strong northeasterly breezes are expected Sunday
 night through at least Tuesday.
 
 The Approximate Shoreward Edge of the Gulf Stream as of December 8...
 
 15 NM South of Dry Tortugas Light...on Loggerhead Key.
 13 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
 14 NM South of Sand Key Light...off Key West.
 18 NM South of Looe Key...off Big Pine Key.
 23 NM Southeast of Sombrero Key Light...off Marathon.
 18 NM Southeast of Alligator Reef Light...off Islamorada.
 12 NM Southeast of Molasses Reef Light...off Key Largo.
 8 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.
 
 $$




 
 GMZ031-120930-
 Florida Bay including Barnes Sound, Blackwater Sound, and
 Buttonwood Sound-
 417 PM EST Thu Dec 11 2025
 

 TONIGHT
 North to northeast winds near 10 knots, becoming
 northeast to east. Bay waters a light chop.

 FRIDAY
 Northeast to east winds near 10 knots. Bay waters a
 light chop.

 FRIDAY NIGHT
 Northeast to east winds near 10 knots. Bay waters
 a light chop. Isolated showers.

 SATURDAY
 Northeast to east winds near 10 knots, becoming east
 and increasing to 10 to 15 knots. Bay waters a light chop,
 becoming a light to moderate chop. Isolated showers.

 SATURDAY NIGHT
 East winds 10 to 15 knots, becoming variable and
 decreasing to 5 to 10 knots. Bay waters a light to moderate chop,
 becoming smooth to a light chop. Scattered showers and isolated
 thunderstorms.

 SUNDAY
 Variable winds near 5 knots, becoming north and
 increasing to near 10 knots. Bay waters smooth, becoming a light
 chop. Scattered showers.

 SUNDAY NIGHT
 North to northeast winds 10 to 15 knots,
 increasing to 15 to 20 knots. Bay waters a light to moderate
 chop, becoming choppy. Isolated showers.

 MONDAY AND MONDAY NIGHT
 Northeast winds near 20 knots. Bay
 waters rough. Isolated showers.

 TUESDAY AND TUESDAY NIGHT
 Northeast to east winds 15 to 20
 knots. Bay waters choppy. Isolated showers.
 
 $$