Marine Weather for HS 101


marine weather discussion NWS National Hurricane Center Miami FL 255 PM EDT Sat Mar 17 2018

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...

A ridge over the northern Gulf will shift east through Sun night ahead of a cold front moving off the Texas coast Mon. The front will extend from the Florida Big Bend area to Veracruz Mexico early Tue, just as a reinforcing push of cold air moves off the Texas coast. The reinforcing front overtakes the first front late Tue, accompanied by strong winds and building seas over the northern Gulf. The merged front sweeps southeast of the Gulf by early Wed. Winds and seas diminish across the Gulf through late Wed as high pressure follows the front across the northern Gulf.

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

High pressure north of the region will support fresh to locally strong trades across the south central Caribbean the next several days, except increasing to near gale force along the northwest coast of Colombia during the overnight hours. A weakening cold front will pass through the Yucatan basin late Tue night. Return flow ahead of the front enhanced by local influences will help support strong se winds over the Gulf of Honduras Mon night. High pressure will build behind the front, which will help to bring strong winds to the Lee of Cuba and Windward Passage late this week. Undersea Volcano kick EM jenny, north of Grenada near 12.18n 61.38w, is in a state of unrest. The government of Grenada advises mariners to observe a 5 km or 3.1 nm exclusion zone around kick EM jenny. Please see the web address nadma.Gd for additional information.

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

A cold front accompanied by fresh to strong winds and 8 to 14 ft seas will move across the waters N of 28n and E of 70w through sun. Another front will follow in the same area through Mon. S to SW winds will increase to fresh to strong off northeast Florida and north of the Bahamas late Mon, then increasing further to near gale to gale force north of 28n with building seas late Tue through Wed as the low pressure and accompanying cold front moves off the Carolina coast. Near gale to gale force SW winds will shift east ahead of the front, while there appears to be an increasing chance that near gale to gale force W to NW winds will develop N of 28n behind the front on Wednesday. These winds and the accompanying low pressure N of the area will build seas as high as 12- 14 ft N of 28n. This pre- frontal scenario is agreed upon by the majority of global models, with some slight timing differences. There remains some spread in the models regarding the Post-frontal winds due to the timing of the low moving off the Carolina coast, and therefore gale force winds behind the front are not in the forecast at the moment. High pressure will build east over the se United States behind the departing system. Although any Post frontal gale that could occur is expected to end S of 31n by late Wednesday, fresh to strong NW winds are expected to continue over the waters N of 28n through at least Thursday night.


.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... none.

.SW N Atlantic including the Bahamas... .amz111...Atlantic from 27n to 31n W of 77w... gale conditions possible Tue night. .Amz113...Atlantic from 27n to 31n between 70w and 77w... gale conditions possible Tue night into Wed. .Amz115...Atlantic from 27n to 31n between 65w and 70w... gale conditions possible Wed.


*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 latto. National Hurricane Center.

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