000 AGXX40 KNHC 191806 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 215 PM EDT SUN APR 19 2009 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... AN E TO W RIDGE ALONG 27N IS RETRACTING E WITH A PRE-FRONTAL TROUGH ALREADY MOVING E OVER THE NW WATERS AND A COLD FRONT HAS MOVED TO THE TX COAST. THE COLD FRONT WILL REACH LINE FROM FL PANHANDLE TO BAY OF CAMPECHE MON AFTERNOON AND MOVE SE OF AREA LATE TUE AFTERNOON. MODELS CONTINUE TO FLUCTUATE ON STRENGTH OF NLY FLOW IN WAKE OF FRONT OR THE SW GULF...WILL GO WITH 20-25 KT EXCEPT SMALL AREA OF 25-30 KT BRIEFLY OVER SW WATERS MON NIGHT AND TUE. HIGH PRES WILL SHIFT ENE FROM THE TX COAST AT 26N MON NIGHT TO A PSN JUST OFF THE SC CAROLINA COAST THU NIGHT. SLY RETURN SETS UP THU NIGHT AND AT 10-15 KT. SW N ATLC... A BROAD FRONTAL TROUGH FRONT EXTENDS NE FROM HISPANIOLA INTO A FRONTAL WAVE LOW THAT DEVELOPED THIS MORNING AND IS CURRENTLY AT 28N57W AND MOVING NE ALONG THE FRONTAL BOUNDARY. GRADIENT STILL SUPPORTING NE WINDS TO 20 KT W OF THE FRONT WITH SEAS TO 10 FT IN NE SWELL REACHING THE SE BAHAMIAN CHAIN. SURFACE HIGH PRES NEAR 30N70W HAS A RIDGE EXTENDING W TO FL E COAST AT 28N WITH SLY FLOW N OF RIDGE AT 10-15 KT ATTM...BUT EXPECTED TO INCREASE TO 15-20 KT TONIGHT TURNING SW AT 20-25 KT MON. RIDGE WILL SHIFT S TO ALONG 27N MON AND ALONG 25N TUE ALLOWING FRONT TO MOVE OFF GA COAST EARLY NIGHT REACHING FROM BERMUDA TO SE BAHAMAS SUNRISE THU THEN STALL FROM 31N55W TO MONA PASSAGE FRI. WIND/SEAS HIGHER E OF FRONT THROUGH PERIOD. CARIBBEAN AND TROPICAL N ATLC... A DISSIPATING COLD OVER THE NW CORNER OF THE TROPICAL ATLC ZONE WITH SEAS TO 7 FT IN N SWELL BEHIND FRONT. ANOTHER WEAK COLD FRONT WILL ENTER THE YUCATAN CHANNEL MON NIGHT REACHING NEAR THE WINDWARD PASSAGE THU NIGHT BEFORE DISSIPATING. OTHERWISE...FRESH TRADE WINDS ARE FORECAST TO CONTINUE ACROSS THE REGION THROUGH THE PERIOD WITH LOCALLY ENHANCED WIND AND SEAS ALONG THE COAST OF COLOMBIA. ATLC... .NONE.. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FORECASTER NELSON. TROPICAL PREDICTION CENTER.