Marine Weather Net

Bayside and Gulf side from Craig Key to West End of Seven Mile Bridge Marine Forecast


THIS AFTERNOON

S
WINDS
5 KNOTS

TONIGHT

SSW
WINDS
5 - 10
KNOTS

SATURDAY

SW
WINDS
5 KNOTS

SATURDAY NIGHT

WSW
WINDS
5 KNOTS

The Marine Weather Forecast In Detail:
GMZ032 Forecast Issued: 1036 AM EDT Fri Jul 03 2020

This Afternoon...Southeast To South Winds Near 5 Knots, Becoming Southwest To West 5 To 10 Knots. Seas 1 Foot Or Less. Nearshore Waters Smooth To A Light Chop. Isolated Showers And Thunderstorms.
Tonight...South To Southwest Winds 5 To 10 Knots, Decreasing To Near 5 Knots. Seas 1 Foot Or Less. Nearshore Waters Smooth To A Light Chop, Becoming Smooth. Isolated Showers And Thunderstorms.
Saturday...Southwest Winds Near 5 Knots. Seas 1 Foot Or Less. Nearshore Waters Smooth. Isolated Showers And Thunderstorms.
Saturday Night...Southwest To West Winds Near 5 Knots. Seas 1 Foot Or Less. Nearshore Waters Smooth. Scattered Showers And Thunderstorms.
Sunday...Southwest Winds 5 To 10 Knots. Seas 1 Foot Or Less. Nearshore Waters Smooth To A Light Chop. Scattered Showers And Thunderstorms.
Sunday Night...South Winds Near 5 Knots. Seas 1 Foot Or Less. Nearshore Waters Smooth. Isolated Showers And Thunderstorms.
Monday...Southeast Winds Near 5 Knots. Seas 1 Foot Or Less. Nearshore Waters Smooth. Isolated Showers And Thunderstorms.
Monday Night...Northeast To East Winds 5 To 10 Knots. Seas 1 Foot Or Less. Nearshore Waters Smooth To A Light Chop. Isolated Showers And Thunderstorms.
Tuesday And Tuesday Night...East To Southeast Winds Near 10 Knots. Seas Around 1 Foot. Nearshore Waters A Light Chop. Isolated Showers And Thunderstorms.
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Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas: GMZ005
1036 AM EDT Fri Jul 3 2020

An Atlantic ridge axis will extend westward across the southern Florida Peninsula and the Keys today. The ridge will settle southward into the Straits this weekend, while weak low pressure will slowly meander through the Southeastern States.

Gulf Stream
The Approximate Shoreward Edge of the Gulf Stream as of July 2...
- 20 NM South of Dry Tortugas Light...on Loggerhead Key.
- 24 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
- 28 NM South of Sand Key Light...off Key West.
- 34 NM South of Looe Key...off Big Pine Key.
- 37 NM South of Sombrero Key Light...off Marathon.
- 11 NM Southeast of Alligator Reef Light...off Islamorada.
- 8 NM Southeast of Molasses Reef Light...off Key Largo.
- 8 NM East of Carysfort Reef Light...off Ocean Reef.
Area Forecast Discussion
National Weather Service Key West FL
1129am EDT Fri July 3 2020

Isolated air mass showers and a couple of thunderstorms will be the main forecast concern through Saturday. The 12z KEY balloon sounding shows that the air mass has moistened over the past 24 hours, with the PW value rising from 1.49" to 1.81". The latter value is near the daily mean for this date in the Storm Prediction Center sounding climatology. Have already had a few showers develop along the island cloud line over and Gulfside of the Lower Keys this morning. A few more cycles of cloud line development and decay are likely up and down the Keys until daytime heating over the narrow island chain eases early this evening.

Marine
An east-west surface ridge axis is located squarely across the Keys today, leading to light breezes of 5 knots or less. The ridge will settle south into the Straits over the course of this afternoon and tonight, leading to a turn to light westerly breezes this afternoon. Florida Bay and the far Upper Keys can get an acceleration of west winds during the late afternoon and early evening due to effects of daytime heating over the FL Peninsula, so that is the one places that could get a couple hours of gentle or even moderate breezes late today.

Otherwise, the ridge axis will rest just to our south Saturday and Sunday, lifting back north across the Keys on Monday. During this time, only light and sometimes gentle breezes are expected. Nearshore waters will have lots of smooth, glassy periods.

Climate
On this date in 1957, the daily record high temperature of 95F was recorded at Key West.

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