Marine Weather Net

Straits of Florida from Ocean Reef to Craig Key out 20 NM Marine Forecast


THIS AFTERNOON

SE
WINDS
5 - 10
KNOTS

TONIGHT

ESE
WINDS
10 - 15
KNOTS

THURSDAY

SE
WINDS
5 - 10
KNOTS

THURSDAY NIGHT

ESE
WINDS
10
KNOTS

The Marine Weather Forecast In Detail:
GMZ052 Forecast Issued: 1029 AM EDT Wed Aug 04 2021

This Afternoon...Southeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. Isolated Showers And Thunderstorms.
Tonight...East To Southeast Winds Increasing To 10 To 15 Knots. Seas 1 To 2 Feet. Isolated Showers And Thunderstorms.
Thursday...East To Southeast Winds Decreasing To 5 To 10 Knots. Seas 1 To 2 Feet. Scattered Showers And Isolated Thunderstorms.
Thursday Night...East To Southeast Winds Increasing To Near 10 Knots. Seas 1 To 2 Feet. Scattered Showers And Isolated Thunderstorms.
Friday...East To Southeast Winds Near 10 Knots. Seas 1 To 2 Feet. Scattered Showers And Isolated Thunderstorms.
Friday Night...East To Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. Scattered Showers And Isolated Thunderstorms.
Saturday...East To Southeast Winds 10 To 15 Knots. Seas 2 To 3 Feet. Scattered Showers And Isolated Thunderstorms.
Sunday...East Winds Near 10 Knots. Seas Around 2 Feet. Scattered Showers And Isolated Thunderstorms.
Sunday Night...East Winds 10 To 15 Knots. Seas 2 To 4 Feet. Scattered Showers And Isolated Thunderstorms.
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Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas: GMZ005
1029 AM EDT Wed Aug 4 2021

A weak ridge axis extending across South Florida will lift northward into Central Florida over the next several days. Light to occasionally moderate southeast to south breezes will continue, with near-normal rain and thunder chances. Breezes will freshen early next week as the ridge axis broadens and lifts further northward into the southeastern United States.

Gulf Stream
The Approximate Shoreward Edge of the Gulf Stream as of August 03, 2021...
- 27 NM South of Dry Tortugas Light...on Loggerhead Key.
- 5 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
- 10 NM South of Sand Key Light...off Key West.
- 21 NM South of Looe Key...off Big Pine Key.
- 19 NM South 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.
- 2 NM East of Carysfort Reef Light...off Ocean Reef.
Area Forecast Discussion
National Weather Service Key West FL
1022am EDT Wednesday August 4 2021

Surface analysis depicts weak ridging over the Florida Peninsula stemming from the Bermuda High centered over the central Atlantic, with a stationary front enveloping the Gulf Coast and the Florida Panhandle. After a wind surge overnight, flow is quickly collapsing across the island chain. The 12z sounding at KEY revealed considerable dry air above 925 mb, but steep low-level lapse rates, a near-surface moist environment, and a decent veering profile. This has allowed a few showers to develop in the vicinity of the Lower Keys, along with several observed waterspouts in Hawk Channel. With diurnally-driven mixing, still expecting the dry air to win the convective initiation battle for the balance of today, and thus no changes are needed or planned for this late-morning update forecast cycle.

Marine
No watches, warnings, or advisories are in effect for the Florida Keys coastal waters. From synopsis, a weak ridge axis extending across South Florida will lift northward into Central Florida over the next several days. Light to occasionally moderate southeast to south breezes will continue, with near-normal rain and thunder chances. Breezes will freshen early next week as the ridge axis broadens and lifts further northward into the southeastern United States.

NOAA Key West FL Office: Watches - Warnings - Advisories
FL...None. GM...None.