Coastal Waters Forecast
Issued by NWS Key West, FL
Issued by NWS Key West, FL
131 FZUS52 KKEY 251025 CWFKEY Coastal Waters Forecast for the Florida Keys National Weather Service Key West FL 625 AM EDT Wed Sep 25 2024 Florida Bay, Hawk Channel and Straits of Florida from Ocean Reef to south of Dry Tortugas, and the extreme southeastern Gulf of Mexico, including The Florida Keys National Marine Sanctuary Seas are given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height. Wave Detail will include details about the period and direction of origin for the highest energy waves. Long-period swells coming from a different direction than the wind would be included in the Wave Detail. GMZ005-251630- Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas 625 AM EDT Wed Sep 25 2024 .SYNOPSIS...Southeasterly breezes will continue to freshen quickly this afternoon as Tropical Storm Helene crosses the Yucatan channel and emerges over the southern Gulf. Thereafter, the storm will track northeastward toward the Big Bend region of Florida, and we will see the closest pass from Helene to the Florida Keys coastal waters later this evening through Thursday morning when the peak southeasterly wind and highest seas is expected to occur. As the storm passes, breezes will shift to the south to southwest while gradually diminishing with seas gradually subsiding Thursday night through Friday. Winds further diminish heading through the weekend. The Approximate Shoreward Edge of the Gulf Stream as of September 24... 58 NM South of Dry Tortugas Light...on Loggerhead Key. 30 NM South of Cosgrove Shoal Light...off the Marquesas Keys. 22 NM South of Sand Key Light...off Key West. 16 NM South of Looe Key...off Big Pine Key. 16 NM South of Sombrero Key Light...off Marathon. 7 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. $$ GMZ031-251630- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 625 AM EDT Wed Sep 25 2024 ...TROPICAL STORM WARNING IN EFFECT... .TODAY...Tropical storm conditions possible. Southeast winds 15 to 20 knots, increasing to 20 to 25 knots this afternoon. Bay waters choppy, becoming very rough this afternoon. Widespread showers and scattered thunderstorms. .TONIGHT...Tropical storm conditions possible. Southeast to south winds 25 to 30 knots. Bay waters extremely rough. Widespread showers and scattered thunderstorms. .THURSDAY...Tropical storm conditions possible. Southeast to south winds 25 to 30 knots with gusts up to 40 knots. Bay waters extremely rough. Widespread showers and scattered thunderstorms. .THURSDAY NIGHT...Tropical storm conditions possible. South winds 25 to 30 knots, decreasing to 20 to 25 knots after midnight. Bay waters extremely rough, becoming very rough. Numerous showers and scattered thunderstorms. .FRIDAY...South winds near 20 knots early, decreasing to 15 to 20 knots, then decreasing to 10 to 15 knots in the afternoon. Bay waters rough, becoming a light to moderate chop. Numerous showers and scattered thunderstorms. .FRIDAY NIGHT...South winds 10 to 15 knots. Bay waters a light to moderate chop. Scattered showers and isolated thunderstorms. .SATURDAY...South to southwest winds near 10 knots. Bay waters a light chop. Scattered showers and isolated thunderstorms. .SATURDAY NIGHT AND SUNDAY...South winds 5 to 10 knots. Bay waters smooth to a light chop. Scattered showers and isolated thunderstorms. .SUNDAY NIGHT...Southeast to south winds near 5 knots, becoming east after midnight. Bay waters smooth. Scattered showers and isolated thunderstorms. $$ GMZ032-035-251630- Bayside and Gulf side from Craig Key to west end of Seven Mile Bridge- Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- 625 AM EDT Wed Sep 25 2024 ...TROPICAL STORM WARNING IN EFFECT... .TODAY...Tropical storm conditions possible. Southeast winds 20 to 25 knots, increasing to 25 to 30 knots this afternoon. Seas 2 to 4 feet, occasionally to 5 feet, except 5 to 8 feet, occasionally to 10 feet west of the Marquesas Keys. Nearshore waters very rough, becoming extremely rough. Widespread showers and scattered thunderstorms. .TONIGHT...Tropical storm conditions expected. Southeast to south winds 25 to 35 knots with gusts up to 45 knots. Seas 3 to 5 feet, occasionally to 6 feet. West of the Marquesas Keys, seas 7 to 10 feet, occasionally to 13 feet, building to 9 to 12 feet, occasionally to 15 feet after midnight. Nearshore waters extremely rough. Widespread showers and scattered thunderstorms. .THURSDAY...Tropical storm conditions expected. South winds 30 to 35 knots with gusts up to 45 knots, decreasing to 25 to 30 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet, except 9 to 13 feet, occasionally to 17 feet west of the Marquesas Keys. Nearshore waters extremely rough. Widespread showers and scattered thunderstorms. .THURSDAY NIGHT...Tropical storm conditions possible. South winds 25 to 30 knots, becoming south to southwest and decreasing to 20 to 25 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. West of the Marquesas Keys, seas 9 to 11 feet, occasionally to 14 feet, subsiding to 7 to 9 feet, occasionally to 11 feet after midnight. Nearshore waters extremely rough, becoming very rough after midnight. Numerous showers and scattered thunderstorms. .FRIDAY...South to southwest winds near 20 knots, decreasing to 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet, except 5 to 7 feet, occasionally to 9 feet west of the Marquesas Keys. Nearshore waters rough, becoming choppy. Numerous showers and scattered thunderstorms. .FRIDAY NIGHT...South winds decreasing to 10 to 15 knots. Seas 2 to 3 feet, except 3 to 4 feet, occasionally to 5 feet west of the Marquesas Keys. Nearshore waters becoming a light to moderate chop. Scattered showers and isolated thunderstorms. .SATURDAY...South winds 10 to 15 knots, becoming south to southwest and decreasing to near 10 knots in the afternoon. Seas 1 to 2 feet, except 2 to 3 feet west of the Marquesas Keys. Nearshore waters a light to moderate chop, becoming a light chop. Scattered showers and isolated thunderstorms. .SATURDAY NIGHT...South winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. .SUNDAY AND SUNDAY NIGHT...South winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. $$ GMZ042-251630- Hawk Channel from Ocean Reef to Craig Key out to the reef- 625 AM EDT Wed Sep 25 2024 ...TROPICAL STORM WARNING IN EFFECT... .TODAY...Tropical storm conditions possible. Southeast winds 15 to 20 knots, increasing to 20 to 25 knots this afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Nearshore waters choppy, becoming very rough. Widespread showers and scattered thunderstorms. .TONIGHT...Tropical storm conditions possible. Southeast to south winds 25 to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Nearshore waters extremely rough. Widespread showers and scattered thunderstorms. .THURSDAY...Tropical storm conditions possible. Southeast to south winds 25 to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Nearshore waters extremely rough. Widespread showers and scattered thunderstorms. .THURSDAY NIGHT...Tropical storm conditions possible. South winds decreasing to 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Nearshore waters becoming very rough. Numerous showers and scattered thunderstorms. .FRIDAY...South winds near 20 knots early, decreasing to 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Nearshore waters becoming choppy. Numerous showers and scattered thunderstorms. .FRIDAY NIGHT...South winds near 15 knots, decreasing to 10 to 15 knots. Seas 2 to 3 feet. Nearshore waters a moderate chop, becoming a light to moderate chop. Scattered showers and isolated thunderstorms. .SATURDAY...South to southwest winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. .SATURDAY NIGHT...South winds near 5 knots. Seas around 1 foot. Nearshore waters smooth. Scattered showers and isolated thunderstorms. .SUNDAY AND SUNDAY NIGHT...South winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. $$ GMZ043-044-251630- 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- 625 AM EDT Wed Sep 25 2024 ...TROPICAL STORM WARNING IN EFFECT... .TODAY...Tropical storm conditions possible. Southeast winds 20 to 25 knots, increasing to 25 to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. West of Cosgrove Shoal Light, seas 5 to 8 feet, occasionally to 10 feet, building to 7 to 9 feet, occasionally to 11 feet this afternoon. Nearshore waters very rough, becoming extremely rough. Widespread showers and scattered thunderstorms. .TONIGHT...Tropical storm conditions expected. Southeast to south winds 25 to 35 knots with gusts up to 45 knots. Seas 5 to 8 feet, occasionally to 10 feet, building to 7 to 10 feet, occasionally to 13 feet after midnight. West of Cosgrove Shoal Light, seas 8 to 11 feet, occasionally to 14 feet, building to 10 to 14 feet, occasionally to 18 feet after midnight. Nearshore waters extremely rough. Widespread showers and scattered thunderstorms. .THURSDAY...Tropical storm conditions expected. South winds 30 to 35 knots with gusts up to 45 knots, decreasing to 25 to 30 knots in the afternoon. Seas 7 to 10 feet, occasionally to 13 feet, except 11 to 15 feet, occasionally to 19 feet west of Cosgrove Shoal Light. Nearshore waters extremely rough. Widespread showers and scattered thunderstorms. .THURSDAY NIGHT...Tropical storm conditions possible. South winds 25 to 30 knots, becoming south to southwest and decreasing to 20 to 25 knots after midnight. Seas 6 to 9 feet, occasionally to 11 feet, except 8 to 11 feet, occasionally to 14 feet west of Cosgrove Shoal Light. Nearshore waters extremely rough, becoming very rough after midnight. Numerous showers and scattered thunderstorms. .FRIDAY...South to southwest winds near 20 knots early, decreasing to 15 to 20 knots. Seas subsiding to 5 to 7 feet, occasionally to 9 feet. Nearshore waters rough, becoming choppy. Numerous showers and scattered thunderstorms. .FRIDAY NIGHT...South winds near 15 knots. Seas 3 to 5 feet, occasionally to 5 feet. Nearshore waters a moderate chop. Scattered showers and isolated thunderstorms. .SATURDAY...South winds 10 to 15 knots, becoming south to southwest and decreasing to near 10 knots in the afternoon. Seas 2 to 3 feet. Nearshore waters a light to moderate chop, becoming a light chop. Scattered showers and isolated thunderstorms. .SATURDAY NIGHT AND SUNDAY...Southeast to south winds 5 to 10 knots. Seas 1 to 2 feet. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas around 1 foot. Nearshore waters smooth to a light chop. Scattered showers and isolated thunderstorms. $$ GMZ052-072-251630- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- 625 AM EDT Wed Sep 25 2024 ...TROPICAL STORM WARNING IN EFFECT... .TODAY...Tropical storm conditions possible. Southeast winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Southeast 6 feet at 6 seconds and north to northeast 1 foot at 11 seconds. Numerous showers and scattered thunderstorms. .TONIGHT...Tropical storm conditions possible. Southeast to south winds 25 to 30 knots. Seas 6 to 9 feet, occasionally to 11 feet. Wave Detail: South 9 feet at 7 seconds and north to northeast 1 foot at 11 seconds. Widespread showers and scattered thunderstorms. .THURSDAY...Tropical storm conditions possible. Southeast to south winds 25 to 30 knots. Seas 9 to 11 feet, occasionally to 14 feet. Wave Detail: Southeast 10 feet at 8 seconds and southwest 7 feet at 12 seconds. Widespread showers and scattered thunderstorms. .THURSDAY NIGHT...Tropical storm conditions possible. South winds decreasing to 20 to 25 knots. Seas 9 to 11 feet, occasionally to 14 feet, subsiding to 7 to 9 feet, occasionally to 11 feet after midnight. Numerous showers and scattered thunderstorms. .FRIDAY...South winds near 20 knots early, decreasing to 15 to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 6 feet, occasionally to 8 feet in the afternoon. Numerous showers and scattered thunderstorms. .FRIDAY NIGHT...South winds decreasing to 10 to 15 knots. Seas subsiding to 3 to 4 feet, occasionally to 5 feet. Scattered showers and isolated thunderstorms. .SATURDAY...South winds 10 to 15 knots, becoming 5 to 10 knots in the afternoon. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers and thunderstorms. $$ GMZ053-073-251630- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- 625 AM EDT Wed Sep 25 2024 ...TROPICAL STORM WARNING IN EFFECT... .TODAY...Tropical storm conditions possible. Southeast winds 20 to 25 knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave Detail: Southeast 8 feet at 6 seconds. Widespread showers and scattered thunderstorms. .TONIGHT...Tropical storm conditions possible. Southeast to south winds 25 to 30 knots. Seas 7 to 10 feet, occasionally to 13 feet. Wave Detail: Southeast to south 10 feet at 7 seconds. Widespread showers and scattered thunderstorms. .THURSDAY...Tropical storm conditions possible. Southeast to south winds 25 to 30 knots. Seas 9 to 13 feet, occasionally to 17 feet. Wave Detail: Southeast to south 10 feet at 7 seconds and southwest to west 7 feet at 12 seconds. Widespread showers and scattered thunderstorms. .THURSDAY NIGHT...Tropical storm conditions possible. South winds 25 to 30 knots, decreasing to 20 to 25 knots after midnight. Seas 9 to 12 feet, occasionally to 15 feet, subsiding to 7 to 9 feet, occasionally to 11 feet after midnight. Numerous showers and scattered thunderstorms. .FRIDAY...South winds near 20 knots, decreasing to 15 to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 6 feet, occasionally to 8 feet in the afternoon. Numerous showers and scattered thunderstorms. .FRIDAY NIGHT...South winds decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers and isolated thunderstorms. .SATURDAY...South winds 5 to 10 knots. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms. .SATURDAY NIGHT THROUGH SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Isolated showers and thunderstorms. $$ GMZ054-074-251630- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- 625 AM EDT Wed Sep 25 2024 ...TROPICAL STORM WARNING IN EFFECT... .TODAY...Tropical storm conditions possible. Southeast winds 20 to 25 knots. Seas 7 to 10 feet, occasionally to 13 feet. Wave Detail: East to southeast 10 feet at 7 seconds. Widespread showers and scattered thunderstorms. .TONIGHT...Tropical storm conditions expected. Southeast to south winds 25 to 35 knots, increasing to 30 to 35 knots after midnight. Seas 9 to 12 feet, occasionally to 15 feet, building to 10 to 14 feet, occasionally to 18 feet after midnight. Wave Detail: Southeast to south 12 feet at 7 seconds and southwest to west 4 feet at 12 seconds. Widespread showers and scattered thunderstorms. .THURSDAY...Tropical storm conditions expected. South winds 30 to 35 knots with gusts up to 45 knots, decreasing to near 30 knots in the afternoon. Seas 12 to 16 feet, occasionally to 20 feet, subsiding to 11 to 14 feet, occasionally to 18 feet in the afternoon. Wave Detail: Southwest 14 feet at 11 seconds and southeast to south 12 feet at 7 seconds. Widespread showers and scattered thunderstorms. .THURSDAY NIGHT...Tropical storm conditions possible. South winds 25 to 30 knots, decreasing to 20 to 25 knots after midnight. Seas 9 to 12 feet, occasionally to 15 feet, subsiding to 6 to 9 feet, occasionally to 11 feet after midnight. Numerous showers and scattered thunderstorms. .FRIDAY...South to southwest winds near 20 knots, decreasing to 15 to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 6 feet, occasionally to 8 feet in the afternoon. Numerous showers and scattered thunderstorms. .FRIDAY NIGHT...South winds decreasing to 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Scattered showers and isolated thunderstorms. .SATURDAY...South winds 10 to 15 knots, becoming 5 to 10 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Scattered showers and isolated thunderstorms. .SATURDAY NIGHT AND SUNDAY...Southeast winds near 10 knots. Seas around 2 feet. Scattered showers and isolated thunderstorms. .SUNDAY NIGHT...East winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and isolated thunderstorms. $$ GMZ034-055-075-251630- Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 625 AM EDT Wed Sep 25 2024 ...TROPICAL STORM WARNING IN EFFECT... .TODAY...Tropical storm conditions expected. Southeast winds 25 to 30 knots, increasing to 30 to 35 knots this afternoon. Seas 7 to 10 feet, occasionally to 13 feet, building to 9 to 12 feet, occasionally to 15 feet this afternoon. Wave Detail: Southeast 11 feet at 7 seconds. Widespread showers and scattered thunderstorms. .TONIGHT...Tropical storm conditions expected. Southeast to south winds 30 to 40 knots. Seas 11 to 15 feet, occasionally to 19 feet, building to 12 to 17 feet, occasionally to 22 feet after midnight. Wave Detail: Southeast 15 feet at 9 seconds and southwest 11 feet at 10 seconds. Widespread showers and scattered thunderstorms. .THURSDAY...Tropical storm conditions expected. South winds 30 to 40 knots with gusts up to 50 knots, decreasing to 25 to 35 knots in the afternoon. Seas 15 to 20 feet, occasionally to 25 feet, subsiding to 12 to 16 feet, occasionally to 20 feet in the afternoon. Wave Detail: South to southwest 17 feet at 11 seconds and east to southeast 13 feet at 9 seconds. Widespread showers and scattered thunderstorms. .THURSDAY NIGHT...Tropical storm conditions possible. South to southwest winds 25 to 30 knots, decreasing to 20 to 25 knots after midnight. Seas 9 to 12 feet, occasionally to 15 feet, subsiding to 7 to 10 feet, occasionally to 13 feet after midnight. Numerous showers and scattered thunderstorms. .FRIDAY...South to southwest winds near 20 knots, decreasing to 15 to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet. Numerous showers and scattered thunderstorms. .FRIDAY NIGHT...South winds near 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Scattered showers and isolated thunderstorms. .SATURDAY...South to southwest winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Numerous showers and isolated thunderstorms. .SATURDAY NIGHT...South winds near 10 knots. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms. .SUNDAY AND SUNDAY NIGHT...Southeast to south winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and isolated thunderstorms. $$ GMZ033-251630- Gulf waters from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- 625 AM EDT Wed Sep 25 2024 ...TROPICAL STORM WARNING IN EFFECT... .TODAY...Tropical storm conditions possible. Southeast winds increasing to 25 to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet, building to 5 to 8 feet, occasionally to 10 feet this afternoon. Wave Detail: Southeast 8 feet at 6 seconds. Widespread showers and scattered thunderstorms. .TONIGHT...Tropical storm conditions expected. Southeast winds 30 to 35 knots with gusts up to 45 knots. Seas 6 to 9 feet, occasionally to 11 feet, building to 8 to 11 feet, occasionally to 14 feet after midnight. Wave Detail: Southeast to south 10 feet at 6 seconds. Widespread showers and scattered thunderstorms. .THURSDAY...Tropical storm conditions expected. South winds 30 to 40 knots. Seas 10 to 14 feet, occasionally to 18 feet. Wave Detail: South to southwest 14 feet at 10 seconds and southeast to south 10 feet at 6 seconds. Widespread showers and scattered thunderstorms. .THURSDAY NIGHT...Tropical storm conditions possible. South to southwest winds near 30 knots, decreasing to 25 to 30 knots. Seas 9 to 12 feet, occasionally to 15 feet. Numerous showers and scattered thunderstorms. .FRIDAY...South to southwest winds 20 to 25 knots, decreasing to 15 to 20 knots in the afternoon. Seas 6 to 9 feet, occasionally to 11 feet, subsiding to 5 to 7 feet, occasionally to 9 feet in the afternoon. Numerous showers and scattered thunderstorms. .FRIDAY NIGHT...South to southwest winds near 15 knots. Seas 3 to 5 feet, occasionally to 6 feet. Scattered showers and isolated thunderstorms. .SATURDAY...South to southwest winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Numerous showers and isolated thunderstorms. .SATURDAY NIGHT...South to southwest near 10 knots. Seas 2 to 3 feet. Scattered showers and isolated thunderstorms. .SUNDAY...South to southwest winds 5 to 10 knots. Seas 1 to 2 feet. Scattered showers and isolated thunderstorms. .SUNDAY NIGHT...North winds 5 to 10 knots, becoming east after midnight. Seas around 1 foot. Scattered showers and isolated thunderstorms. $$ DP