000 AGXX40 KNHC 181844 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 150 PM 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 FRONTAL SYSTEM THAT STALLED OVER THE SOUTH WATERS YESTERDAY NIGHT IS CURRENTLY MOVING SE AND EXTENDS FROM SE FLORIDA TO THE NW PART OF THE YUCATAN PENINSULA. A SECOND AND STRONGER COLD FRONT STRETCHES FROM SE LOUISIANA TO NEAR TAMPICO MEXICO WHICH HAS REPORTED SUSTAINED WINDS OF 20 TO 25 KT FROM THE N. THIS SECOND COLD FRONT WILL OVERTAKE THE FIRST ONE THIS AFTERNOON WITH THE MERGED FRONT MOVING SE OF THE GULF TONIGHT. NLY WINDS OF 20 TO 25 KT ARE ALREADY BLOWING BEHIND THE SECOND OR REINFORCING COLD FRONT. WINDS AND SEAS WILL INCREASE ACROSS THE SOUTH WATERS 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 N OF HONDURAS NEAR 17N85W. SHOWERS AND THUNDERSTORMS HAVE INCREASED IN ASSOCIATION WITH THIS LOW PRESSURE DURING THE MORNING HOURS PARTICULARLY W OF 80W. THE LOW CENTER IS EXPECTED TO MOVE INLAND OVER BELIZE AND GUATEMALA BY LATE TOMORROW...LIMITING THE OPPORTUNITY FOR SIGNIFICANT DEVELOPMENT. THERE IS A LOW CHANCE OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. WINDS AND SEAS WILL BE HIGHER NEAR THE TSTMS. A TROUGH EXTENDS ALONG 85W TO THE LOW CENTER AND INTO NE NICARAGUA. ELY WINDS AT 15-20 KT WILL PERSIST E OF THE TROUGH AXIS TO ABOUT 65W. THE MERGED COLD FRONT PREVIOUSLY MENTIONED WILL MOVE INTO THE NW CARIBBEAN TONIGHT. 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 LATE SAT WITH SEAS TO 11 FT SPREADING SE THROUGH THE NE PASSAGES LATE SUN INTO MON. SW N ATLC S OF 31N AND W OF 65W... A COLD FRONT ENTERS THE AREA NEAR 31N65W THEN CONTINUES SW ACROSS THE STRAITS OF FLORIDA INTO THE SE PORTION OF THE GULF OF MEXICO. A SECOND COLD FRONT CURRENTLY OVER THE GULF OF MEXICO WILL RACE INTO THE NW ATLC WATERS LATER THIS AFTERNOON OVERTAKING THE INITIAL FRONT TONIGHT...WITH THE MERGED FRONT EXTENDING MAINLY E TO W FROM 21N65W TO EASTERN CUBA BY SAT. THE TAIL END OF THE FRONT WILL BE NEAR PUERTO RICO AND THE VIRGIN ISLANDS BY SUN. 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 GR