Bayside and Gulf side from Craig Key to West End of Seven Mile Bridge Marine Forecast
|Overnight...Northeast Winds 5 To 10 Knots, Becoming East And Increasing To Near 10 Knots. Seas Around 1 Foot. Nearshore Waters Smooth To A Light Chop, Becoming A Light Chop.|
|Friday...East To Southeast Winds 10 To 15 Knots. Seas 1 To 2 Feet. Nearshore Waters A Light To Moderate Chop.|
|Friday Night...East To Southeast Winds Increasing To 15 To 20 Knots. Seas 1 To 3 Feet, Except 2 To 4 Feet West Of The Marquesas Keys. Nearshore Waters Becoming Choppy.|
|Saturday...East To Southeast Winds 15 To 20 Knots. Seas 1 To 3 Feet, Except 2 To 4 Feet West Of The Marquesas Keys. Nearshore Waters Choppy.|
|Sunday...East To Southeast Winds 15 To 20 Knots. Seas 1 To 3 Feet, Except 2 To 4 Feet West Of The Marquesas Keys. Nearshore Waters Choppy.|
|Sunday Night...East To Southeast Winds Near 15 Knots. Seas 1 To 3 Feet. Nearshore Waters A Moderate Chop.|
|Monday...Southeast Winds 10 To 15 Knots. Seas 1 To 2 Feet. Nearshore Waters A Light To Moderate Chop.|
|Monday Night...East To Southeast Winds Near 10 Knots. Seas Around 1 Foot. Nearshore Waters A Light Chop.|
|Tuesday And Tuesday Night...East To Southeast Winds 5 To 10 Knots. Seas 1 Foot Or Less. Nearshore Waters Smooth To A Light Chop.|
| Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas: GMZ005|
1028 PM EST Thu Feb 25 2021
A fractured high pressure system draped across Florida will move into the western North Atlantic tonight. A dominant dome of high pressure will push off the Mid- Atlantic and New England Coasts Friday and Friday night. Fresh east to southeast breezes will persist Friday night through Sunday night, with the strongest winds Saturday night. Breezes are expected to subside Monday and Monday night.
The Approximate Shoreward Edge of the Gulf Stream as of February 25...
- 62 NM South of Dry Tortugas Light...on Loggerhead Key.
- 26 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
- 17 NM South of Sand Key Light...off Key West.
- 17 NM South of Looe Key...off Big Pine Key.
- 15 NM South of Sombrero Key Light...off Marathon.
- 11 NM Southeast of Alligator Reef Light...off Islamorada.
- 10 NM Southeast of Molasses Reef Light...off Key Largo.
- 5 NM East of Carysfort Reef Light...off Ocean Reef.
| Area Forecast Discussion|
National Weather Service Key West FL
1028pm EST Thu Feb 25 2021
Currently - A weak high pressure system sits across Florida, resulting in light mostly northeast to east breezes across the Keys and surrounding waters. A strong subsidence inversion is based a little below 750 mb with very dry air aloft. Earlier in the evening this allowed a few showers to develop along boundaries with a relatively moist boundary layer and some room for development. All activity within our area has since dissipated, but a few showers are approaching our eastern Florida Straits. The associated decks of stratocumulus has also mostly evaporated.
Short Term Update
Weak ridging will remain across Florida through the overnight period keeping winds light out of the northeast to east. Lower to mid level ridging will persist along with very dry air aloft. Rain chances will remain slim to none through the overnight period with most of the incoming shower activity likely remaining over the Florida Straits. Temperatures will bottom out in the lower 70s. A bit warmer than last night due to the more veered flow. The more veered flow will also allow dew point temperatures to creep upwards towards 70.
Weak high pressure across Florida will result in light winds becoming more east northeast to east by morning. No significant changes made in the evening marine update.
NOAA Key West FL Office: Watches - Warnings - Advisories