000 AGXX40 KNHC 091928 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 330 PM EDT THU APR 09 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 EXTENDS ACROSS THE GULF ALONG 26N. SLY RETURN FLOW AT 15-20 KT OVER WATERS W OF 87W IS EXPECTED TO SPREAD E COVERING THE ENTIRE GULF LATE TONIGHT. THE GRADIENT BACKS OFF OVER THE NW GULF EARLY FRI AHEAD OF A WEAK COLD FRONT MOVING TO THE NW COASTAL WATERS LATE FRI AND STALLING LATE FRI NIGHT. EACH MODEL RUNS ADJUSTS THE EASTWARD ADVANCE OF THIS WEAK FRONT BUT EXPECTING THE W PORTION OF THE FRONT TO MOVE BACK W OF AREA SAT NIGHT INTO SUN AS LOW PRES SPINS UP OVER N TEXAS SUN AFTERNOON. AN ASSOCIATED COLD FRONT WILL MOVE INTO THE NW COASTAL PLAINS SUN NIGHT. MODELS HAVING A TIME WITH THIS SECOND FRONT AS WELL...CURRENT THINKING IS FOR THIS FRONT TO SLIP OFFSHORE TX AROUND SUNRISE MON THEN IT GETS SOME NW REINFORCEMENT MOVING IT E FASTER MON NIGHT REACHING A PSN FROM FL BIG BEND TO BAY OF CAMPECHE LATE TUE WEAKENING THEREAFTER. N ATLC... A FRONTAL TROUGH FROM 31N58W TO NW HISPANIOLA WILL LIE ALONG 28N57W TO 24N74W FRI AFTERNOON AND THEN MOVE FURTHER N AS A WEAK WARM FRONT SAT. HIGH PRES NEAR 27N73W WILL SHIFT A LITTLE FURTHER E TONIGHT WITH A RIDGE W ACROSS THE FL COAST AT 27-28N. SLY FLOW N OF THIS RIDGE AT 15-20 KT CONTINUING TO LATE SAT WHEN A COLD FRONT MOVES INTO THE NORTHERN. THE RIDGE SHIFTS E OF THE BAHAMAS SAT NIGHT ALLOWING THE FRONT TO REACH PSN FROM BERMUDA TO NW CUBA SUN AFTERNOON WHERE THE PORTION OF THE FRONT WILL STALL AND QUICKLY DISSIPATE SUN NIGHT INTO EARLY MON. NLY WINDS TO 15-20 KT WILL FILL IN OVER AREA BEHIND FRONT BECOMING SLY AGAIN OVER THE NW PART EARLY MON WITH ANOTHER COLD FRONT MOVING OFF THE GA COAST LATE TUE. CARIBBEAN... REMNANTS OF A FRONT ARE MOVING W THROUGH THE NW CARIBBEAN ATTM ACCOMPANIED BY ONLY WEAK SHOWERS. NE WINDS AT 15-20 KT CURRENTLY REPORTED IN THE WINDWARD PASSAGE ARE EXPECTED WILL DIMINISH TO 10-15 KT TONIGHT. SE FLOW AT 15 KT OVER THE NW CARIBBEAN WILL INCREASE TO 15-20 KT BY SUNRISE FRI AND CONTINUE THROUGH THU. OTHERWISE TRADES EXPECTED TO BE MOSTLY NE-E 10-15 KT EXCEPT NE-E 15-20 KT S OF 13N E OF 78W...SLIGHTLY HIGHER ALONG COAST OF COLOMBIA...WITH LITTLE CHANGE EXPECTED TILL LATE FRI INTO EARLY SAT WHEN GRADIENT TIGHTENS BRIEFLY SUPPORTING 15-20 KT THROUGHOUT AREA WITH LOCALLY ENHANCED 25-30 KT NEAR NW COAST OF COLOMBIA. ATLC... .NONE.. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FORECASTER NELSON. TROPICAL PREDICTION CENTER.