000 AGXX40 KNHC 111732 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1230 PM EDT SUN NOV 11 2007 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... THE DOMINANT WEATHER INFLUENCE IS A 1028 MB SURFACE HIGH PRES CELL CENTERED OVER THE SOUTHEAST U.S. GENERALLY LIGHT TO MODERATE ELY FLOW PREVAILS OVER MUCH OF THE GULF TODAY. SLIGHTLY HIGHER WINDS ARE NOTED OR EXPECTED OVER THE FAR WESTERN GULF AS WELL AS NEAR THE YUCATAN CHANNEL ON THE PERIPHERY OF THE HIGH PRES. EXPECT LIGHT TO MODERATE OVER THE ENTIRE GULF BY MID WEEK AS THE HIGH PRES SHIFTS SLIGHTLY S...AND A TROUGH OF LOW PRES OVER THE WESTERN CARIBBEAN WEAKENS. LOOKING AHEAD...WINDS AND SEAS WILL INCREASE SLIGHTLY BEHIND A WEAK COLD FRONT THAT WILL PUSH INTO NORTHERN GULF WATERS THU AND FRI. ATLANTIC... NLY SWELL OF UP TO 8 FT IS PUSHING INTO THE AREA NE OF THE BAHAMAS. HIGH PRES WILL BUILD INTO THIS AREA OVER THE NEXT COUPLE OF DAYS...RESULTING IN SLIGHTLY HIGHER TRADES TO THE OVER THE SOUTHERN BAHAMAS. THE WINDS AND NLY SWELL WILL DIMINISH BY WED AS THE HIGH SHIFTS FURTHER S...LEAVING GENERALLY MODERATE ELY FLOW THROUGH THE REMAINDER OF THE WEEK. CARIBBEAN... MAIN ITEM OF INTEREST CONTINUES TO BE A 1008 MB LOW PRES SYSTEM OFF COSTA RICA NEAR 11N82W. WEAK TROUGH IS ANALYZED FROM THE LOW TO JUST WEST OF JAMAICA NEAR 18N79W. HIGH RESOLUTION SCATTEROMETER DATA SHOWED NWLY WINDS UP TO 25 KNOTS OFF THE NICARAGUAN COAST THIS MORNING. HOWEVER...BASED ON LATEST POSITION OF THE LOW...IT IS LIKELY THAT THE WINDS HAVE VEERED MORE NE AND HAVE DIMINISHED SLIGHTLY. SHIPS AND SCATTEROMETERS CONTINUE TO SHOW 20 TO 25 KT FLOW HOWEVER OVER THE NW CARIBBEAN...IN THE TIGHTER GRADIENT BETWEEN THE TROUGH AND HIGH PRES TO THE N. FOR THE FORECAST...ELY STEERING FLOW WILL PUSH THE LOW PRES ONSHORE PROBABLY TONIGHT. NONETHELESS...RIDGING TO THE N WILL STILL SUPPORT MODERATE TO FRESH ELY FLOW OVER MUCH OF THE WESTERN CARIBBEAN THROUGH MIDWEEK. TRADES WILL DIMINISH SLIGHTLY LATER IN THE WEEK IN RESPONSE TO WEAKENING HIGH PRES TO N. WARNINGS... ATLC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER CHRISTENSEN