Marine Weather Net

Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM Marine Forecast


OVERNIGHT

E
WINDS
10 - 15
KNOTS

MONDAY

E
WINDS
10
KNOTS

MONDAY NIGHT

NNE
WINDS
5 - 10
KNOTS

TUESDAY

NE
WINDS
10
KNOTS

The Marine Weather Forecast In Detail:
GMZ054 Forecast Issued: 1020 PM EST Sun Dec 05 2021

Overnight...East Winds 10 To 15 Knots. Seas 2 To 3 Feet. Isolated Showers.
Monday...East Winds Near 10 Knots, Decreasing To 5 To 10 Knots. Seas Around 2 Feet, Subsiding To 1 To 2 Feet. Scattered Showers.
Monday Night...North To Northeast Winds 5 To 10 Knots, Increasing To Near 10 Knots. Seas 1 To 2 Feet. Isolated Showers.
Tuesday...Northeast Winds Near 10 Knots. Seas Around 2 Feet. Isolated Showers.
Tuesday Night...Northeast To East Winds Near 10 Knots, Becoming East. Seas Around 2 Feet. Isolated Showers.
Wednesday...East To Southeast Winds Near 10 Knots, Decreasing To 5 To 10 Knots In The Afternoon. Seas Around 2 Feet. Isolated Showers.
Wednesday Night...East Winds 5 To 10 Knots, Increasing To Near 10 Knots. Seas Around 2 Feet. Isolated Showers.
Thursday...East To Southeast Winds Near 10 Knots. Seas Around 2 Feet. Isolated Showers.
Thursday Night...East Winds 10 To 15 Knots. Seas 2 To 3 Feet. Isolated Showers.
Friday...East Winds 10 To 15 Knots. Seas 2 To 4 Feet. Isolated Showers.
Friday Night...East Winds Near 15 Knots. Seas 3 To 5 Feet. Isolated Showers.
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Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas: GMZ005
1020 PM EST Sun Dec 5 2021

A ridge of high pressure will hold over the area through tomorrow before splintering. Winds will become light to gentle from the northeast through Monday evening. Breezes will turn to the southeast to south by the middle of the week, and there could be periods where winds become light and variable during the afternoon as a frontal boundary nears northern Florida. Breezes will turn back to the east by Thursday as high pressure rebuilds across Florida, then gradually freshen by the weekend.
Area Forecast Discussion
National Weather Service Key West FL
1036pm EST Sunday Dec 5 2021

A tranquil evening was observed across the Keys with a few mid to upper-level clouds. The fair and stable weather pattern is forecast to continue during the overnight hours due to limited moisture content and a significant synoptic feature that will induce lift. Unsurprisingly, the KKEY 00Z sounding depicted an intense inversion layer. The layer has been steadfast over the local area since late last week. Although the ridging will still hold, there could be a meager uptick in shower activity as low level moisture becomes trapped underneath the ridge. At this time, the likely place for shower development is the Florida Straits.

A frontal boundary will shift into the Lower Mississippi and Tennessee Valleys tomorrow and cause hazardous weather. The trough will continue.nue to advance eastward through Tuesday, before settling near the Gulf Coast.

Marine
There are no watches, warnings, or advisories currently in effect for the coastal waters of the Florida Keys. From synopsis, A ridge of high pressure will hold over the area through tomorrow before splintering. Winds will become light to gentle from the northeast through Monday evening. Breezes will turn to the southeast to south by the middle of the week, and there could be periods where winds become light and variable during the afternoon as a frontal boundary nears northern Florida. Breezes will turn back to the east by Thursday as high pressure rebuilds across Florida, then gradually freshen by the weekend.

High amplitude tides will persist over the next couple of days. The tidal range will remain near 3 feet for portions of the Lower Keys. Moored vessels should allow for more slack in their spring lines to account for the tidal cycles, and boaters should plan for less clearance under fixed bridges at times of high tide.

Climate
On this day in 1876, both the daily record cold high of 60F and the record low of 45F were recorded. Temperature records in Key West date back to 1872.

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