GMZ005-140830-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
423 PM EDT Sun Jul 13 2025
.SYNOPSIS...Shower coverage is forecast to gradually increase
tonight as additional moisture is directed across the CWA. Weak
low pressure tries to develop in the vicinity of Florida heading
through the first half of the week. Initially, the Keys will be on
the southern fringe in a col region resulting in mainly variable
breezes through Monday night. As the weak low pressure area shifts
to the west and high pressure builds in behind, breezes will
freshen becoming southeast to south at first, before becoming east
to southeast for mid to late week. Also, expect increasing
coverage of showers and thunderstorms for the early to middle part
of the week.
The Approximate Shoreward Edge of the Gulf Stream as of July 8...
14 NM South of Dry Tortugas Light...on Loggerhead Key.
5 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
4 NM South of Sand Key Light...off Key West.
4 NM South of Looe Key...off Big Pine Key.
5 NM Southeast of Sombrero Key Light...off Marathon.
6 NM Southeast of Alligator Reef Light...off Islamorada.
3 NM Southeast of Molasses Reef Light...off Key Largo.
4 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.
$$
GMZ031-140830- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 423 PM EDT Sun Jul 13 2025 TONIGHT Variable winds near 5 knots. Bay waters smooth. Scattered showers and isolated thunderstorms. MONDAY Variable winds near 5 knots. Bay waters smooth. Bay waters rough and winds higher in and around widespread showers and scattered thunderstorms. MONDAY NIGHT Variable winds near 5 knots, becoming south to southwest after midnight. Bay waters smooth. Numerous showers and scattered thunderstorms. TUESDAY South winds 5 to 10 knots. Bay waters smooth to a light chop. Numerous showers and scattered thunderstorms. TUESDAY NIGHT Southeast to south winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Bay waters smooth to a light chop, becoming a light to moderate chop. Scattered showers and thunderstorms. WEDNESDAY Southeast to south winds 10 to 15 knots, decreasing to near 10 knots. Bay waters a light to moderate chop, becoming a light chop. Numerous showers and scattered thunderstorms. WEDNESDAY NIGHT East to southeast winds near 10 knots, becoming southeast and increasing to near 15 knots. Bay waters a light chop, becoming a moderate chop. Scattered showers and isolated thunderstorms. THURSDAY THROUGH FRIDAY NIGHT East to southeast winds 10 to 15 knots. Bay waters a light to moderate chop. Scattered showers and isolated thunderstorms. $$
GMZ031-140830- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- 423 PM EDT Sun Jul 13 2025 TONIGHT Variable winds near 5 knots. Bay waters smooth. Scattered showers and isolated thunderstorms. MONDAY Variable winds near 5 knots. Bay waters smooth. Bay waters rough and winds higher in and around widespread showers and scattered thunderstorms. MONDAY NIGHT Variable winds near 5 knots, becoming south to southwest after midnight. Bay waters smooth. Numerous showers and scattered thunderstorms. TUESDAY South winds 5 to 10 knots. Bay waters smooth to a light chop. Numerous showers and scattered thunderstorms. TUESDAY NIGHT Southeast to south winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Bay waters smooth to a light chop, becoming a light to moderate chop. Scattered showers and thunderstorms. WEDNESDAY Southeast to south winds 10 to 15 knots, decreasing to near 10 knots. Bay waters a light to moderate chop, becoming a light chop. Numerous showers and scattered thunderstorms. WEDNESDAY NIGHT East to southeast winds near 10 knots, becoming southeast and increasing to near 15 knots. Bay waters a light chop, becoming a moderate chop. Scattered showers and isolated thunderstorms. THURSDAY THROUGH FRIDAY NIGHT East to southeast winds 10 to 15 knots. Bay waters a light to moderate chop. Scattered showers and isolated thunderstorms. $$