Home


000
AGXX40 KNHC 240758
MIMATS

Marine Weather Discussion
NWS National Hurricane Center Miami FL
358 AM EDT Tue Oct 24 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...

A cold front extends from NE Florida, into the south central Gulf, into the SW corner of the area. Widely scattered moderate to isolated strong rainshowers are from 22N southward between 90W and 97W. Gale-force winds are forecast to develop again for the waters near Veracruz Mexico, around noon today. A reinforcing shot of cold air will increase the pressure gradient in the Gulf, bringing 20 to 25 kt winds to almost all of the Gulf from Tuesday evening until around midday on Wed. The front will move from the Gulf into the NW Caribbean by dawn on Wed. Winds and seas in the basin will subside Wed night and Thu as high pressure builds across the northern Gulf.


...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W...

A 58W Atlantic Ocean tropical wave is to the east of the Windward Islands, and it is being sheared and weakened by a middle level to upper level eastern Caribbean Sea trough. Isolated moderate to locally strong rainshowers are within 240 nm to the east of the tropical wave, and within 120 nm to the west of the wave. Fresh to locally strong trade winds to the east of the wave axis are expected to maintain an area of 8 ft seas east of the Windwards generally between 09N and 15N between 45W and 58W for the next few days. The tropical wave is expected to continue weakening and survive at lower latitudes as it progresses westward.

A 1008 mb low pressure center is along the NE coast of Nicaragua, near the eastward extension of the monsoon trough from the eastern Pacific Ocean. Fresh to strong winds and sea heights ranging from 8 to 11 ft cover almost all of the central Caribbean Sea. The winds and seas will diminish by Tue afternoon as a cold front heading SE from the United States weakens the ridge. The front will enter the NW Caribbean on Wed morning, then stall on Thursday. The funneling of winds between the front and the Yucatan Peninsula will generate an area of strong winds and seas to 8 ft or higher Wed morning through Thursday morning. The models are trending upward with winds and seas in this area, with the potential for a minimal gale in the far western Caribbean Sea during this time frame. The prevailing winds in the Caribbean Sea are expected to remain light to moderate on Thu and Fri, with a weak ridge remaining in place to the north. Low pressure is expected to be in the NW corner of the Caribbean Sea by Friday.


...SW N ATLANTIC INCLUDING THE BAHAMAS...

A W Atlc Ocean 1030 mb high pressure center that is near 40N60W will help to maintain fresh to locally strong E to SE winds, especially S of 22N today. A cold front will move SE from the Carolinas and Florida this morning. Strong S winds and seas building to 8 ft can be expected just N of the discussion area, or N of 31N W of 75W around sunrise. It is possible that the front may be accompanied by a line of rainshowers with thunder, and capable of producing strong gusty winds and rough seas. The front will weaken as it moves SE Wed through Thu night. A round of NE swell generated to the N of a weakening front over the central Atlc will cause seas to build to 8 ft near 31N65W on Wed. High pressure is expected to slide NE from the Gulf of Mexico, along the SE coast of the United States Friday and Saturday, supporting light to gentle winds and seas of 4 to 5 ft east of the Bahamas.

$$


.WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone:


.GULF OF MEXICO...
.GMZ023...SW GULF S OF 22N W OF 94W... Gale Warning today into Wed. GALE CONDITIONS POSSIBLE Sat into Sat night.


.CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None.


.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 MT. National Hurricane Center.

Home