GMZ005-050245-
Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas
1035 AM EDT Mon May 4 2026
.SYNOPSIS...The coastal waters surrounding the Florida Keys remain
in a chaotic state as a weak frontal boundary lingers nearby. This
is creating gentle northerly breezes across the western waters
with light and variable winds elsewhere. Additional rounds of
convection are possible this afternoon, especially across the
Straits of Florida. The stronger showers and thunderstorms will
be capable of strong gusty winds, locally higher seas, at times
frequent lightning strikes, and blinding downpours. The active
pattern will gradually calm down over the next 24 hours. Winds
will then shift north to northeast as the boundary starts washing
out across the Florida Straits. Winds will remain light and
varying tomorrow into tomorrow night due to the lingering remnant
boundary. By mid week the western flank of a broad Atlantic Ridge
will move across Florida and establish a more normal light to
gentle east to southeasterly flow.
The Approximate Shoreward Edge of the Gulf Stream as of April 28...
16 NM South of Dry Tortugas Light...on Loggerhead Key.
10 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
9 NM South of Sand Key Light...off Key West.
9 NM South of Looe Key...off Big Pine Key.
12 NM Southeast of Sombrero Key Light...off Marathon.
10 NM Southeast of Alligator Reef Light...off Islamorada.
6 NM Southeast of Molasses Reef Light...off Key Largo.
6 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.
$$
GMZ052>055-072>075-050245- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 1035 AM EDT Mon May 4 2026 THIS AFTERNOON Northwest winds 5 to 10 knots, becoming north to northeast. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 7 seconds and northwest 2 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms. TONIGHT Northeast winds 5 to 10 knots, becoming variable near 5 knots after midnight. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet at 6 seconds and northeast 2 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms. TUESDAY Variable winds near 5 knots, becoming west to northwest 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: North to northeast 2 feet at 6 seconds. A slight chance of showers and thunderstorms. TUESDAY NIGHT Winds becoming variable near 5 knots. Seas 1 to 2 feet. A slight chance of showers. WEDNESDAY East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. WEDNESDAY NIGHT East to southeast winds near 10 knots. Seas 1 to 2 feet. THURSDAY Southeast winds 5 to 10 knots. Seas 1 to 2 feet. THURSDAY NIGHT East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. FRIDAY AND FRIDAY NIGHT East to southeast winds 5 to 10 knots. Seas around 1 foot. SCT025 $$
GMZ052>055-072>075-050245- 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- 1035 AM EDT Mon May 4 2026 THIS AFTERNOON Northwest winds 5 to 10 knots, becoming north to northeast. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 7 seconds and northwest 2 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms. TONIGHT Northeast winds 5 to 10 knots, becoming variable near 5 knots after midnight. Seas 2 to 3 feet. Wave Detail: Northwest 2 feet at 6 seconds and northeast 2 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms. TUESDAY Variable winds near 5 knots, becoming west to northwest 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: North to northeast 2 feet at 6 seconds. A slight chance of showers and thunderstorms. TUESDAY NIGHT Winds becoming variable near 5 knots. Seas 1 to 2 feet. A slight chance of showers. WEDNESDAY East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. WEDNESDAY NIGHT East to southeast winds near 10 knots. Seas 1 to 2 feet. THURSDAY Southeast winds 5 to 10 knots. Seas 1 to 2 feet. THURSDAY NIGHT East to southeast winds 5 to 10 knots. Seas 1 to 2 feet. FRIDAY AND FRIDAY NIGHT East to southeast winds 5 to 10 knots. Seas around 1 foot. SCT025 $$