Marine Weather for HS 101


marine weather discussion NWS National Hurricane Center Miami FL 209 am EST Mon Dec 11 2017

Marine weather discussion for the Gulf of Mexico, Caribbean Sea, and tropical North Atlantic from 07n to 19n between 55w and 64w and the southwest North Atlantic including the Bahamas

...Gulf of Mexico...

1031 mb high over northern Mexico continues to expand E-se across the basin in the wake of a strong cold front, now well se of the area. Winds and seas have continued the diminishing trend with moderate to locally fresh winds, except fresh to strong offshore of Veracruz. Seas of 4-7 ft in residual NW swell continue to subside across the se half of the basin with 1-3 ft seas across the NW half of the basin.

The high will drift E-NE to near the S TX coast through this coming evening with narrow ridging developing across across the basin, producing only gentle to moderate winds and 1-3 ft seas across the waters, except 4-5 ft in lingering N swell in the far se part. The next cold front will move into the northern waters by early Tue morning, pushing se of the basin by early Wed morning. Winds are now forecast to shift to W-NW and increase to fresh to strong in the N central and NE Gulf in the wake of the front, with seas building to 6-8 ft. Marine conditions will then improve Wed and Wed night with new high pres building across the area, ushering in light and variable winds and 1-3 ft seas. Yet another cold front will likely move into the NW and N central waters Thu night through Fri.

...Caribbean Sea and tropical N Atlantic from 07n to 19n between 55w and 64w...

A stationary front extends from near the Windward Passage to across Jamaica to western Panama. Active convection remains near the boundary S of 16n and W of the front. A recent scatterometer pass measured northerly gale force winds S of 16n and W of the front, with moderate to fresh northerly winds elsewhere behind the boundary. Seas are up to 12-17 ft S of 18n and W of the front, with 7-11 ft seas N of 18n. Moderate to fresh trades and 4-7 ft seas prevail E of the front.

The front will remain nearly stationary through the early part of the week, gradually dissipating Tue through Wed, becoming a remnant trough by Thu. Gale force winds offshore of Nicaragua will diminish by this coming evening with fresh to strong northerly flow then remaining S of 18n and W of the front to 84w through Wed night before finally diminishing by early Thu as the front becomes a trough. Meanwhile, NE flow downwind of the Windward Passage will increase to fresh to strong Wed night through Thu morning before diminishing. Also, trades will increase to fresh to strong in the S central Caribbean Wed night through the end of the week, reaching 30 kt NW of the coast of Colombia by Fri night with seas building to 12 ft.

...SW N Atlantic including the Bahamas...

A stalling cold front extends from just E of Bermuda to near the Windward Passage. A recent scatterometer pass showed lingering fresh to strong N-NE flow S of 27n within 180 nm NW of the front where seas are also 7-9 ft. High pres continues to build W of the front with only moderate winds elsewhere W of the front and mainly 4-7 ft subsiding seas. E of the front, moderate E-se flow and 4-7 ft seas prevail.

The front will completely stall from near 27n65w to near the Windward Passage by this evening. The lingering fresh to strong winds and 7-9 ft seas will finally diminish and subside by early Tue. Meanwhile, the next cold front will be approaching the NW portion with winds becoming SW and increasing to fresh to strong offshore of NE Florida Tue morning. The front will sweep across the waters Tue evening through Thu morning. SW flow ahead of the front will increase to near gale force Tue night with shifting W-NW strong to near gale force winds behind the front. These winds will spread across the entire waters N of 27n with seas rapidly building to 8-16 ft through Thu, quickly subsiding thereafter. Yet another strong cold front may move across the waters Fri into the coming weekend with another round of fresh to near gale force winds across the waters N of 27n.


.Warnings...Any changes impacting coastal NWS offices will be coordinated through AWIPS ii collaboration chat, or by telephone:

.Gulf of Mexico... None.

.Caribbean Sea and tropical N Atlantic from 07n to 19n between 55w and 64w... .Amz029...W central Caribbean from 11n to 15n W of 80w... Gale Warning today.

.SW N Atlantic including the Bahamas... None.


*For detailed zone descriptions, please visit: http://www.NHC.NOAA.Gov/abouttafbprod.Shtml#owf

Note: gridded marine forecasts are available in the National digital forecast database (ndfd) at: http://www.NHC.NOAA.Gov/marine/grids.Php

For additional information, please visit: http://www.NHC.NOAA.Gov/marine


.Forecaster lewitsky. National Hurricane Center.

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