000 AGXX40 KNHC 211808 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 208 PM EDT MON APR 21 2014 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... MODEL PREFERENCE: LATEST GFS BLENDED WITH PREVIOUS OFFICIAL. FOR WAVES BLENDED THE PREVIOUS FORECAST WITH THE LATEST MWW3 AND NWPS. HIGH CONFIDENCE. HIGH PRESSURE PREVAILS OVER THE FORECAST AREA. LATEST SATELLITE DERIVED WINDS AND SEAS ALONG WITH SHIP...BUOY...AND CMAN OBSERVATIONS DEPICT MAINLY LIGHT TO GENTLE ANTICYCLONIC WINDS OVER THE FORECAST WATERS. SEAS ARE IN THE 1 TO 3 FT RANGE OVER THE MAJORITY OF THE WATERS EXCEPT FOR THE FAR SW WATERS WHERE SEAS ARE REACHING NEAR 4 FT. A WEAK COLD FRONT WILL MOVE INTO THE FAR NORTHERN WATERS TUE NIGHT BEFORE DISSIPATING ON WEDNESDAY. OTHERWISE...HIGH PRES WILL BE CENTERED OVER THE FORECAST AREA THROUGH MIDWEEK BEFORE SHIFTING EASTWARD FOR THE SECOND HALF OF THE WEEK. WITH THE HIGH PRESSURE CENTER SHIFTING EASTWARD... SOUTHERLY RETURN FLOW WILL SET UP OVER THE ENTIRE WATERS BY THU NIGHT...AND WILL PREVAIL THROUGH THE REMAINDER OF THE FORECAST. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... MODEL PREFERENCE: LATEST GFS BLENDED WITH PREVIOUS OFFICIAL. FOR WAVES BLENDED THE PREVIOUS FORECAST WITH THE LATEST MWW3 AND NWPS. HIGH CONFIDENCE. BROAD TROUGHING PREVAILS N OF THE AREA. LATEST SATELLITE DERIVED WINDS AND SEAS ALONG WITH SHIP...BUOY...AND CMAN OBSERVATIONS DEPICT MODERATE TO FRESH TRADES OVER THE CENTRAL CARIBBEAN WITH SEAS IN THE 6 TO 8 FT RANGE. MODERATE WINDS PREVAIL OVER THE EASTERN CARIBBEAN WITH SEAS IN THE 4 TO 6 FT RANGE...AND GENTLE TO MODERATE WINDS PREVAIL OVER THE WESTERN CARIBBEAN WITH SEAS IN THE 3 TO 5 FT RANGE. TROUGHING WILL PREVAIL N OF THE AREA THROUGH MUCH OF THE WEEK MAINTAINING A WEAK PRESSURE GRADIENT OVER THE CARIBBEAN WATERS. SEAS OVER THE CENTRAL CARIBBEAN WILL CONTINUE TO SUBSIDE...AND WILL FALL BELOW 8 FT BY TUE AFTERNOON. WITH A WEAK PRESSURE PATTERN PREVAILING...ONCE SEAS FALL BELOW 8 FT ON TUESDAY...WINDS AND SEAS WILL REMAIN BELOW ADVISORY CRITERIA THROUGH SAT. MODERATE TO FRESH TRADEWINDS PREVAIL OVER THE TROPICAL N ATLC WATERS WITH SEAS IN THE 6 TO 8 FT RANGE IN NE TO E SWELL. SEAS WILL CONTINUE TO SUBSIDE OVER THE NEXT 24 HOURS...AND WILL SUBSIDE BELOW 8 FT BY TUE AFTERNOON. SEAS WILL THEN CONTINUE BELOW 8 FT THROUGH THE REMAINDER OF THE FORECAST PERIOD. ...SW N ATLANTIC INCLUDING THE BAHAMAS... MODEL PREFERENCE: LATEST GFS BLENDED WITH PREVIOUS OFFICIAL. FOR WAVES BLENDED THE PREVIOUS FORECAST WITH THE LATEST MWW3 AND NWPS. HIGH CONFIDENCE. A COLD FRONT EXTENDS FROM NEAR 31N68W TO THE WINDWARD PASSAGE WHILE A TROUGH EXTENDS FROM 31N74W TO THE NORTHERN BAHAMAS. LATEST SATELLITE DERIVED WINDS AND SEAS ALONG WITH SHIP...BUOY...AND CMAN OBSERVATIONS DEPICT MODERATE TO FRESH WINDS WITH SEAS 8 TO 11 FT IN NE SWELL W OF THE TROUGH. FRESH TO STRONG WINDS PREVAIL N OF 25N WITHIN 180 NM E OF THE COLD FRONT WITH SEAS IN THE 8 TO 9 FT RANGE. ELSEWHERE GENTLE TO MODERATE WINDS PREVAIL WITH SEAS 5 TO 7 FT E OF THE BAHAMAS... AND 1 TO 3 FT W OF THE BAHAMAS. THE COLD FRONT WILL CONTINUE ITS EASTWARD MOVEMENT..AND WILL SHIFT E OF THE AREA TUE...BRINGING THE ASSOCIATED FRESH TO STRONG WINDS E OF THE AREA ALONG WITH IT. A SECOND COLD FRONT WILL CLIP THE NORTHERN WATERS WED NIGHT THROUGH THU. THIS WILL BRING AN INCREASE IN WINDS AND SEAS MAINLY N OF 29N AND E OF 75W. NW SWELL ASSOCIATED TO THIS FEATURE WILL BUILD SEAS TO NEAR 11 FT OVER THE FAR NE WATERS BY LATE THU NIGHT. $$ .WARNINGS...ANY CHANGES IMPACTING COASTAL NWS OFFICES WILL BE COORDINATED THROUGH AWIPS 12 PLANET CHAT OR BY TELEPHONE: .GULF OF MEXICO... NONE. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... NONE. .SW N ATLANTIC INCLUDING THE BAHAMAS... NONE. $$ *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.HURRICANE WARNINGS.GOV/MARINE $$ .FORECASTER AL. NATIONAL HURRICANE CENTER.