000
AGXX40 KNHC 190747
MIMATS

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
345 AM EDT FRI APR 19 2013

MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN
SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND
64W...AND THE SW N ATLANTIC INCLUDING THE BAHAMAS.

GULF OF MEXICO... 
COLD FRONT EXTENDS FROM SE LOUISIANA TO NEAR TAMPICO MEXICO. 
LATEST OBSERVATIONS DEPICT WINDS TO GALE FORCE OVER THE FAR NW 
GULF WATERS WITH SEAS BUILDING QUICKLY TO 12 FT IN THE AREA OF 
GALE FORCE WINDS. FRESH TO STRONG SE WINDS PREVAIL N OF THE 
YUCATAN PENINSULA WITH GENTLE TO MODERATE WINDS AND SEAS 4-6 FT 
ELSEWHERE. THE GALE FORCE WINDS WILL CONTINUE TO SHIFT SOUTHWARD 
ALONG THE COASTLINE OF MEXICO AS THE COLD FRONT PUSHES SE ACROSS 
THE GULF WATERS TODAY. WINDS ARE EXPECTED TO DIMINISH BELOW GALE 
FORCE TONIGHT. THE FRONT WILL STALL AND BEGINS TO WASH OUT FROM 
NEAR FT MYERS TO THE BAY OF CAMPECHE ON SAT...THEN WILL 
DISSIPATE SUN WITH WINDS AND SEAS DECREASING THROUGH EARLY NEXT 
WEEK. HIGH PRESSURE WILL BUILD IN THE WAKE OF THE FRONT WITH 
RIDGE BUILDING N OF THE AREA BY MON AND SE RETURN FLOW SETTING 
UP OVER THE WESTERN GULF TUE. 

CARIBBEAN SEA AND TROPICAL N ATLC S OF 22N W OF 55W...       
HIGH PRESSURE CENTERED OVER THE CENTRAL ATLC HAS RIDGE EXTENDING 
SE ACROSS THE SW N ATLC WATERS INTO THE SE GULF. THIS FEATURE IS 
HELPING TO MAINTAIN MODERATE TO FRESH TRADES OVER MUCH OF THE 
CARIBBEAN...WITH LATEST ASCAT PASS DEPICTING STRONG WINDS OVER 
THE GULF OF HONDURAS. MODERATE TO FRESH WINDS WILL CONTINUE TO 
PREVAIL OVER THE CARIBBEAN WATERS THROUGH EARLY SUN...THEN WILL 
DIMINISH SUN THROUGH THE FIRST HALF OF THE WEEK AS THE HIGH 
PRESSURE CENTER SHIFTS FURTHER EASTWARD WEAKENING THE PRESSURE 
GRADIENT. 

SW N ATLC S OF 31N W OF 55W...                                   
RIDGE OF HIGH PRESSURE EXTENDS ACROSS THE NORTHERN SW N ATL 
WATERS ACROSS SOUTHERN FLORIDA. THIS IS MAINTAINING FRESH TO 
STRING WINDS OVER THE SOUTHERN PART OF THE AREA AND GENTLE TO 
MODERATE WINDS OVER THE NORTHERN PART OF THE AREA AS DEPICTED BY 
THE LATEST ASCAT PASS AS WELL AS SHIP AND BUOY OBSERVATIONS. 
SEAS ARE GENERALLY 8-9 FT IN THE AREA OF HIGHEST WINDS AND 4-6 
FT ELSEWHERE. SE RETURN FLOW WILL INCREASE TODAY N OF 27N W OF 
73W AHEAD OF AN APPROACHING COLD FRONT. GLOBAL MODELS REMAIN IN 
GOOD AGREEMENT TIMING THE ARRIVAL OF THE FRONT ALONG THE NE 
FLORIDA COAST BY FRI NIGHT. THE FRONT WILL SHIFT E BEFORE 
STALLING FROM REACH FROM 31N77W TO SOUTHERN FLORIDA BY LATE 
SAT...THEN WEAKENING TO A TROUGH WHERE IT WILL LINGER THROUGH 
THE EARLY PART OF NEXT WEEK. 
                                 
.WARNINGS...ANY CHANGES WILL BE COORDINATED THROUGH AWIPS 12
PLANET CHAT OR BY TELEPHONE:

.GULF OF MEXICO...
GMZ011...NONE.
GMZ013...NONE.
GMZ015...NONE.
GMZ017...GALE WARNING FRI INTO FRI NIGHT. 
GMZ019...NONE.
GMZ021...NONE.
GMZ023...GALE WARNING FRI INTO FRI NIGHT. 
GMZ025...NONE.

.CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN
55W AND 64W...
AMZ011...NONE.
AMZ013...NONE.
AMZ015...NONE.
AMZ017...NONE.
AMZ019...NONE.
AMZ021...NONE.
AMZ023...NONE.
AMZ025...NONE.
AMZ027...NONE.
AMZ029...NONE.
AMZ031...NONE.
AMZ033...NONE.
AMZ035...NONE.
AMZ037...NONE.
AMZ039...NONE.

.SW N ATLANTIC INCLUDING THE BAHAMAS...
AMZ111...NONE.
AMZ113...NONE.
AMZ115...NONE.
AMZ117...NONE.
AMZ119...NONE.
AMZ121...NONE.
AMZ123...NONE.
AMZ125...NONE.
AMZ127...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://PREVIEW.WEATHER.GOV/GRAPHICAL

FOR ADDITIONAL INFORMATION PLEASE VISIT:
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORECASTER AL