000 AGXX40 KNHC 010655 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 200 AM EST TUE JAN 01 2013 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... A RIDGE DISSECTING THE GULF FROM THE FL BIG BEND TO NE OLD MEXICO WILL RETRACT E TODAY AS A COLD FRONT ENTERS THE NW WATERS. THE FRONT WILL REACH FROM THE MS DELTA TO THE WESTERN BAY OF CAMPECHE THIS EVENING...THEN BEGIN TO SLOW. THE FRONT WILL WEAKEN BUT REACH FROM THE FL BIG BEND TO THE CENTRAL GULF WATERS WHERE A FRONTAL WAVE WILL DEVELOP EARLY WED...THEN MOVE NE ALONG THE FRONTAL BOUNDARY BUT DISSIPATE BEFORE REACHING TAMPA BAY ON THU. A REINFORCING NORTHERLY SURGE WILL PUSH THE FRONT TO THE FAR S GULF WATERS ON FRI WITH GUIDANCE SUGGESTING A WEAK LOW WILL DEVELOP ALONG THE FRONTAL REMNANTS IN THE BAY OF CAMPECHE ON FRI...AND PERSIST THROUGH SUN. EXPECT NORTHERLY WINDS TO MAX AT 30 KT OVER THE SW GULF W OF THE FRONT. USED LATEST GFS TO POPULATE GRIDS. SW N ATLC S OF 31N W OF 65W... A COLD FRONT EXTENDING FROM 23N55W TO ACROSS THE N CENTRAL CARIBBEAN ISLANDS WILL WASH OUT TODAY. SURFACE HIGH PRESSURE NEAR 30N72W WILL SHIFT SE TO NEAR 27N65W LATE TODAY...NEAR 26N56W LATE WED...THEN SHIFT E OF 55W WED NIGHT WITH A RIDGE EXTENDING W TO THE NORTHERN BAHAMAS. A COLD FRONT WILL MOVE OFF THE GA COAST ON WED...REACHING 31N75W TO 27N80W LATE THU WITH NORTHERLY WINDS 15-20 KT N OF THE FRONT. THE FRONT WILL EXTEND FROM 30N55W TO THE NORTHERN BAHAMAS LATE FRI WITH WINDS N OF FRONT DIMINISHING TO 10-15 KT ACROSS THE WATERS W OF 70W WHILE A 20-25 KT SW-W WIND SHIFT WILL OCCUR WITHIN 240 NM OF THE OVER THE WATERS FROM 70-55W. THE FRONT WILL SHIFT E OF 55W ON SAT. USED LATEST GFS TO POPULATE GRIDS. CARIBBEAN SEA AND TROPICAL N ATLC S OF 22N W OF 55W...AS ATLC ATLC HIGH PRESSURE WILL SHIFT FURTHER S INCREASING THE EASTERLY TRADES SOME DURING THE MIDDLE OF THE WEEK. LONG PERIOD N SWELLS WILL PROPAGATE INTO THE TROPICAL N ATLC AND NE CARIBBEAN ATLC PASSAGES TUE THROUGH THU THEN GRADUALLY SUBSIDE FROM NW TO SE. 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 NELSON