000 AGXX40 KNHC 200645 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 145 AM EST SAT NOV 20 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... CMAN OBSERVATIONS ALONG WITH A 03 UTC ASCAT PASS SHOW 20 KT NE WINDS OVER THE STRAITS OF FLORIDA...SOUTH OF A 1028 MB SURFACE HIGH PRES CENTERED OVER THE CAROLINAS. THE 03 UTC ASCAT PASS SHOWS 20 KT FLOW OUT OF THE NE ALONG THE E COAST OF THE YUCATAN. THIS IS TYPICALLY A NOCTURNAL EVENT AND WINDS WILL DIMINISH LATER THIS MORNING. ELSEWHERE GENERALLY LIGHT TO MODERATE EASTERLY FLOW PERSISTS...ALTHOUGH EXPECT THESE E TO SE WINDS TO GRADUALLY INCREASE TO 15 TO 20 KT THROUGH LATE SUN AS THE HIGH PRES SHIFTS INTO THE WESTERN ATLC AND LOW PRES PUSHES INTO THE CENTRAL PLAINS. THESE WINDS WILL DIMINISH SLIGHTLY BY TUE AS THE LOW PRES LIFTS OUT. A COLD FRONT PUSHES THROUGH THE SOUTHERN PLAINS ON WED...APPROACHING THE TEXAS COAST BY LATE WED. CARIBBEAN SEA AND TROPICAL N ATLC S OF 22N AND W OF 55W... A STATIONARY FRONT EXTENDS FROM CENTRAL CUBA TO ALONG THE BELIZE COAST. BUOY 42056 IN THE NW CARIBBEAN SHOWS 20 KT NE WINDS ALONG THE FRONT. SHIP OBSERVATION ALSO SHOWS 20 KT NE WINDS IN THE WINDWARD PASSAGE. A 0120 UTC ASCAT PASS ALONG WITH REPORTS FROM BUOY 42069 SHOW 20 KT NE FLOW ALSO IN THE EASTERN CARIBBEAN...TO THE NW OF A TROUGH THAT EXTENDS ALONG 65W. EASTERLY TRADES WILL INCREASE SLIGHTLY ACROSS THE CARIBBEAN AND TROP N ATLC THROUGH MID WEEK AS HIGH PRES PERSISTS N OF THE AREA OVER THE WESTERN ATLC. THE STRONGEST WINDS WILL BE OVER THE N CENTRAL CARIBBEAN WHERE 20 TO 25 KT WINDS CAN BE EXPECTED STARTING SUN...INCLUDING THROUGH THE ATLC PASSAGES. THE PERSISTENTLY STRONG NE FLOW WILL GENERATE SEAS OF 10 TO 12 FT IN THE CENTRAL AND WESTERN CARIBBEAN BY MON...WITH 8 TO 10 SECOND PERIODS. SW N ATLC S OF 31N W OF 65W... A COLD FRONT EXTENDS FROM 25.5N65W TO NEAR CROOKED ISLAND IN THE SOUTHERN BAHAMAS...THEN STATIONARY TO CENTRAL CUBA NEAR 22N77W. BUOY DATA ALONG WITH A 0120 UTC ASCAT PASS SHOW GENERALLY 20 KT WINDS N OF THE FRONT TO ABOUT 29N. SEVERAL SHIP OBSERVATIONS IN THE BAHAMAS INDICATE STRONGER WINDS TO 25 KT. THE COLD FRONT WILL SHIFT SE THROUGH THE AREA BY EARLY SUN. 1028 MB SURFACE HIGH PRES OVER THE CAROLINAS WILL SHIFT E INTO THE WESTERN ATLC THROUGH TONIGHT BEHIND THE FRONT. A TIGHT PRES GRADIENT WILL REMAIN ON THE SOUTHERN PERIPHERY OF THE HIGH PRES...MAINTAINING FRESH TO OCCASIONALLY STRONG WINDS...GENERALLY S OF 27N THROUGH MIDWEEK. SEAS E OF THE BAHAMAS WILL BUILD TO 8 TO 11 FT IN NE SWELL SUN THROUGH MIDWEEK. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER CHRISTENSEN