000 AGXX40 KNHC 260801 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 300 AM EST WED NOV 26 2008 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO... CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. RADIOFAX SCHEDULE FOR GRAPHICAL WIND WAVE...SURFACE FORECAST AND PEAK WAVE PERIOD CHARTS HAS CHANGED. FOR THE ATLANTIC BASIN THIS INCLUDES 24...36...48 AND 72 HOUR WIND WAVE..24...48..72 HOUR SURFACE FORECAST AND 48 AND 72 HOUR PEAK WAVE PERIOD CHARTS. FOR ADDITIONAL INFORMATION PLEASE REFER TO THE FAX SCHEDULE ON THE NHC WEB SITE AT HTTP://WWW.NHC.NOAA.GOV/RADIOFAX.SHTML THE GULF OF MEXICO... A MAINLY DRY COLD FRONT EXTENDS FROM MIAMI TO THE SOUTH CENTRAL GULF OF MEXICO TO 25N96W. THE EASTERN PART OF THE FRONT IS EXPECTED TO CONTINUE SOUTHEASTWARD WHILE THE WESTERN PART OF THE FRONT LIFTS NORTHWARD AS A WARM FRONT LATER TODAY. THIS DOES NOT AFFECT WINDS AND SEAS SIGNIFICANTLY AS THE BOUNDARY WILL BE DISSIPATING. A 1024 MB HIGH IN EXTREME SOUTHEASTERN LOUISIANA WILL BE SHIFTING EASTWARD AND WILL MOVE INTO THE ATLANTIC OCEAN TO THE EAST OF FLORIDA THU NIGHT IN ADVANCE OF THE NEXT COLD FRONT. NWP MODELS DIFFER SLIGHTLY IN THE TIMING OF THE NEXT FRONT WITH GFS/ECMWF/NAM FORECASTING THE BOUNDARY TO ENTER THE NORTHWESTERN GULF OF MEXICO ON FRIDAY AFTERNOON. THE NGPS/UKMET SUGGEST TIMES AS LATE AS SAT MORNING. LEANING TOWARD THE LATTER IDEA...SLOWING DOWN THE MOVEMENT OF THE FRONT IN ORDER TO BE MORE CONSISTENT WITH THE NGPS/UKMET. THE CARIBBEAN SEA AND THE TROPICAL NORTH ATLANTIC OCEAN... A QUASI-STATIONARY LOW PRESSURE CENTER IS AND HAS BEEN IN THE EXTREME SOUTHWESTERN CARIBBEAN SEA FOR THE LAST FEW DAYS. A SURFACE TIGHT PRESSURE GRADIENT BETWEEN THE LOW AND A CENTRAL ATLANTIC OCEAN HIGH PRESSURE CENTER IS PRODUCING 20-30 KT NORTHEASTERLY NE WINDS OVER MUCH OF THE AREA. WINDS ARE BEGINNING TO DIMINISH ACROSS THE FAR NORTHWESTERN WATERS DUE TO AN APPROACHING COLD FRONT. WINDS AND SEAS ARE EXPECTED TO SUBSIDE THROUGH MUCH OF THE PERIOD AS A COLD FRONT TRACKS JUST N OF THE AREA...WEAKENING THE PRESSURE GRADIENT. LONG PERIOD NORTHERLY SWELL WILL BE THE MAIN ITEM OF INTEREST TO MARINERS IN THE TROPICAL NORTH ATLC FOR THE NEXT SEVERAL DAYS AS THE LOW PRESSURE CENTER DRIFTS OVER THE CENTRAL ATLC. COMBINED SEAS WILL BE IN THE 8-12 FT RANGE FOR THE N HALF THROUGH THU NIGHT. SW N ATLC... A COLD FRONT HAS MOVED OFF THE SE U.S. COAST EXTENDING FROM 31N70W TO SOUTH FLORIDA NEAR MIAMI. NWP MODELS ARE IN AGREEMENT IN SHOWING THE BOUNDARY WEAKENING AS IT TRACKS SE OF THE AREA THU. HIGH PRES SHIFTS E BEHIND THE FRONT ALLOWING WINDS AND SEAS TO DIMINISH UNTIL THE NEXT COLD FRONT ARRIVES FRI NIGHT OR EARLY SAT. A NE SWELL EVENT IS ASSOCIATED WITH A LARGE MEANDERING LOW PRES SYSTEM IN THE CENTRAL ATLC...ELEVATING SEAS TO 10 FT BUT WILL BE SUBSIDING OVER THE NEXT FEW DAYS. ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER MT. TROPICAL PREDICTION CENTER.