000 AGXX40 KNHC 180613 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 115 AM EST THU NOV 18 2010 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... THE INITIAL COLD FRONT HAS STALLED A LITTLE FURTHER N THAN PREVIOUSLY EXPECTED ALONG LINE FROM TAMPA BAY TO THE MEXICAN COAST NEAR 21N96.5W. THE RIDGE IS NOW ORIENTATED FROM NW FL PANHANDLE TO BRO TX. A SECOND COLD FRONT IS JUST ENTERING THE EXTREME NW COASTAL WATERS ATTM. SO EXCEPT FOR PSN OF STALLING FRONT BEING A TAD N...GUIDANCE HAS BEEN RIGHT ON TRACK. THE RIDGE WILL RETRACT N TO OVER THE EXTREME N CENTRAL WATERS AT SUNRISE TODAY AND BE N OF AREA BY MID MORNING AS THE SECONDARY FRONT SWEEPS E ACROSS THE NORTHERN WATERS. HIGH PRES IN THE WAKE OF THIS SECOND FRONT WILL INCREASE N-NE WINDS TO 20-25 KT WITH THESE CONDITIONS SPREADING E ACROSS THE ENTIRE GULF BY TONIGHT. A NE-SW RIDGE WILL EXTEND OVER THE NW COASTAL PLAINS FRI AFTERNOON THEN SHIFT SE AND BECOME STATIONARY OVER THE NW GULF THROUGH MON WITH SE RETURN FLOW SETTING UP ALL WATERS ON FRI NIGHT AND CONTINUING THROUGH MON. CARIBBEAN SEA AND TROP ATLC S OF 22N BETWEEN 65W AND 55W... A BROAD AREA OF LOW PRESSURE REMAINS OVER THE W CARIBBEAN ANALYZED AS SURFACE TROUGH EXTENDING FROM 19N85W TO 10N78W. ELY WINDS AT 15-20 KT WILL PERSIST E OF THE TROUGH AXIS TO ALONG ABOUT 65W. A SECONDARY COLD FRONT WILL SWEEP E ACROSS THE GULF OF MEXICO TODAY AND INTO THE NW CARIBBEAN FRI. STRONG HIGH PRES IN WAKE OF FRONT WILL REINFORCE THE ALREADY NORTHEASTERLY FLOW WITH NE 15-20 KT CONDITIONS ACROSS ALL WATERS BY FRI NIGHT AND FURTHER INCREASING TO 20-25 KT SUN AND MON. NLY SWELLS WILL ARRIVE TO N ATLC PASSAGES SUN WITH SEAS TO 11 FT SPREADING SE THROUGH THE NE PASSAGES LATE MON INTO TUE. SW N ATLC S OF 31N AND W OF 65W... HIGH PRES HAS SHIFTED SE TO NEAR 28N67W AND AN INITIAL COLD FRONT EXTENDS FROM 31N73W TO 26N80W. A SECOND COLD FRONT WILL RACE INTO THE NW ATLC WATERS LATER TODAY OVERTAKING THE INITIAL FRONT TONIGHT...WITH THE MERGED FRONT LOSING MOST OF ITS SE PUSH ON SAT AS IT EXTENDS FROM 24N55W TO HISPANIOLA WITH SOME REMNANTS DECAYING OVER CENTRAL CUBA. HIGH PRES IN WAKE OF FRONT WILL THEN CHANGE LITTLE THROUGH MON AND SUPPORT ELY 10-15 KT N OF 27N AND 15-20 KT S OF 27N EARLY SUN. BY LATE SUN GRADIENT TIGHTENS WITH 15-20 KT N OF 27N AND 20-25 KT S OF 27N SUN NIGHT INTO EARLY MON. GRADIENT MAY RELAX A BIT MON NIGHT OVER THE NORTHERN WATERS. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER NELSON