000 AGXX40 KNHC 141828 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 230 PM EDT FRI SEP 14 2012 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND TROPICAL N ATLC...AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... HIGH PRES CENTER OVER SOUTHEASTERN UNITED STATES RESULT IN LIGHT TO MODERATE ANTICYCLONIC FLOW WITH 2-4 FT SEAS ACROSS BASIN. MODEL GUIDANCE IN AGREEMENT THAT APPROACHING UPPER LEVEL TROUGH WILL INDUCE SURFACE TROUGH TO INTENSIFY INTO A LOW PRES OVER WESTERN GULF WATERS SUN NIGHT. LOW PRES EXPECTED TO TRACK NE UNTO SOUTHEASTERN STATES MON DRAGGING WEAK COLD FRONT TO MOVE INTO NW GULF WATERS ON TUE. SOUTHWEST NORTH ATLC S OF 31N W OF 55W... SURFACE TROUGH EXTENDS FROM 31N65W ACROSS CENTRAL BAHAMAS TO STRAITS OF FLORIDA. ABUNDANT TROPICAL MOISTURE AVAILABLE ALONG BOUNDARY W OF 75W TO PROMPT SCATTERED MODERATE AND ISOLATED STRONG CONVECTION MAINLY OVER BAHAMAS AND SOUTH FLORIDA. TROUGH DRIFT SE AND GRADUALLY DISSIPATE BY LATE SUN WHILE RIDGE CURRENTLY OVER SE STATES MOVE OVER BASIN. BY MON...RIDGE BRINGS GENTLE TO MODERATE NE-E BREEZE ACROSS ENTIRE BASIN THROUGH WED. LARGE SWELLS FROM TROPICAL STORM NADINE...WHICH IS EXPECTED TO REMAIN WELL E OF 65W...MOVE ACROSS AREA E OF 70W BUILDING SEAS UP TO 10 FT BY EARLY SAT THEN START SUBSIDING. CARIBBEAN SEA AND TROPICAL N ATLC W OF 55W... SWELLS FROM NADINE HAVE STARTED TO SUBSIDE IN NE PORTIONS OF TROPICAL N ATLC AND NE CARIBBEAN AS THE STORM CONTINUES MOVING N AWAY FROM BASINS...PRES GRADIENT RELAXES AND WINDS ACROSS ENTIRE CARIBBEAN DIMINISHED TO A GENTLE TO MODERATE BREEZE...WITH THE EXCEPTION OF A FRESH BREEZE ALONG COAST OF COLOMBIA. HIGH PRES BUILD BACK INTO N ATLC LATE SUN AND INCREASE EASTERLY TRADES LATE IN FORECAST PERIOD. NOTE...GRIDDED MARINE FORECAST IS AVAILABLE AT WWW.NHC.NOAA.GOV/TAFB/GRIDDED_MARINE GULF OF MEXICO... .NONE. CARIBBEAN SEA AND TROPICAL N ATLC... .NONE. SW N ATLANTIC... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT WWW.HURRICANES.GOV/MARINE $$ FORECASTER WALLY BARNES