GMZ005-080900-
 Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
 446 PM EDT Wed Oct 7 2026
 
 
 .SYNOPSIS...Tropical Storm Isaias, currently over the southwestern
 Gulf waters, is expected to move towards the North Gulf Coast
 over the next few days, strengthening as it does so. A cold front
 currently draped across north-central Florida will slowly press
 southward infringing on the surface ridge to its south. In doing
 so, these systems will act in tandem and create a tightening
 pressure gradient across the Keys, resulting in freshening mainly
 southeast breezes as we head into the weekend. In addition,
 moisture will also be on the rise leading to higher rain and
 thunder chances. Any showers and storms will be capable of causing
 hazardous marine conditions through the weekend.
 
 The Approximate Shoreward Edge of the Gulf Stream as of October 2, 2026...
 
 39 NM south-southeast of Dry Tortugas Light, on Loggerhead Key
 14 NM south-southeast of Cosgrove Shoal Light, off the Marquesas Keys
 8 NM south-southeast of Sand Key Light, off Key West
 2 NM south-southeast of Looe Key, off Big Pine Key
 1 NM south-southeast of Sombrero Key Light, off Marathon
 0 NM south-southeast of Alligator Reef Light, off Islamorada
 2 NM northwest of Molasses Reef Light, off Key Largo
 2 NM northwest of Carysfort Reef Light, off Ocean Reef
 
 Gulf Stream Information Courtesy of the Naval Oceanographic Office.
 
 $$




 
 GMZ042>044-080900-
 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-
 446 PM EDT Wed Oct 7 2026
 

 TONIGHT
 Southwest to west winds 5 to 10 knots, becoming south
 late. Seas 1 foot or less. Nearshore waters smooth to a light
 chop. A chance of showers with a slight chance of thunderstorms.

 THURSDAY
 South winds near 10 knots early, decreasing to 5 to
 10 knots. Seas around 1 foot. Nearshore waters a light chop,
 becoming smooth to a light chop. A chance of showers with a slight
 chance of thunderstorms.

 THURSDAY NIGHT
 Southeast winds near 10 knots, increasing to 10
 to 15 knots. Seas building to 1 to 2 feet. Nearshore waters a
 light chop, becoming a light to moderate chop. A slight chance of
 showers and thunderstorms.

 FRIDAY
 Southeast winds 10 to 15 knots, increasing to near 15
 feet. Seas 1 to 2 feet, building to 2 to 3 feet. Nearshore waters
 a light to moderate chop. A chance of showers with a slight
 chance of thunderstorms.

 FRIDAY NIGHT
 Southeast winds increasing to near 15 knots. Seas
 building to 2 to 4 feet, occasionally to 5 feet, except 4 to 5
 feet, occasionally to 6 feet west of Cosgrove Shoal Light.
 Nearshore waters becoming a moderate chop. Showers likely with a
 chance of thunderstorms.

 SATURDAY
 Southeast to south winds near 15 knots. Seas 3 to 5
 feet, occasionally to 6 feet. Nearshore waters a moderate chop. A
 chance of showers and thunderstorms.

 SATURDAY NIGHT
 Southeast winds near 15 knots. Seas 3 to
 4 feet, occasionally to 5 feet. Nearshore waters a moderate chop.
 A chance of showers and thunderstorms.

 SUNDAY
 East to southeast winds decreasing to 10 to 15 knots.
 Seas subsiding to 2 to 4 feet, occasionally to 5 feet. Nearshore
 waters becoming a light to moderate chop.

 SUNDAY NIGHT
 East winds near 10 knots. Seas around 2 feet.
 Nearshore waters a light chop.

 MONDAY
 Northeast to east winds near 10 knots, decreasing to 5
 to 10 knots. Seas subsiding to 1 to 2 feet. Nearshore waters a
 light chop, becoming smooth to a light chop.

 MONDAY NIGHT
 Northeast to east winds near 5 knots. Seas around
 1 foot. Nearshore waters smooth. A slight chance of showers.
 
 $$