000 AGXX40 KNHC 131838 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 245 PM EDT FRI MAY 13 2011 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 PRE-FRONTAL TROUGH WILL MOVE OFF THE TEXAS COAST AND ACROSS THE NW PORTION OF THE GULF THIS AFTERNOON WHILE A WEAK 1016 MB HIGH PRES OVER THE NE PORTION OF THE GULF WILL SHIFT EWD TOWARD THE NW BAHAMAS AND INTO THE SW N ATLC. A COLD FRONT CURRENTLY OVER TEXAS WILL ENTER THE NW GULF WATERS TONIGHT EXTENDING FROM THE FLORIDA PANHANDLE TO NE MEXICO NEAR 25N98W SAT MORNING... FROM THE FLORIDA BIG BEND TO NEAR TAMPICO MEXICO SAT EVENING... FROM 29N83W TO 23N88W SUN MORNING THEN DISSIPATE FROM NEAR TAMPA BAY TO SE GULF LATE SUN INTO MON. FRESH 20 KT WINDS WILL BE W OF THE FRONT THROUGH SAT THEN WILL DIMINISH BELOW 20 KT BY SAT NIGHT. A SECOND COLD FRONT IS FORECAST TO MOVE ACROSS THE NE PORTION OF THE GULF MON INTO TUE IN ASSOCIATION WITH A DEEPENING LOW PRES SYSTEM OVER THE SE CONUS. W TO NW WINDS ASSOCIATED WITH THE CYCLONIC CIRCULATION OF THE LOW WILL DOMINATE MOST OF THE EASTERN HALF OF THE GULF WATERS. SW N ATLC... A 997 MB LOW PRES LOCATED NEAR 35N61W IS PRODUCING NW TO N WINDS OF 20 KT OVER THE NE WATERS. LARGE NORTHERLY SWELLS IN ASSOCIATION WITH THIS SYSTEM ARE ALSO AFFECTING THE AREA E OF BAHAMAS. AN EARLIER JASON PASS ALONG WITH SOME SHIP OBSERVATIONS VERIFIED THE PRESENCE OF SEA HEIGHTS IN THE 8 TO 12 FT RANGE. THE LOW PRES IS FORECAST TO REMAIN NEAR STATIONARY DURING THE NEXT 24 HOURS. SEAS WILL SUBSIDE TO BELOW 8 FT LATE SAT AS THE LOW PRES OVER THE NE PART OF THE AREA BEGINS TO WEAKEN. A WEAK TROUGH EXTENDING FROM 24N65W TO THE SE BAHAMAS WILL DRIFT SE AND WEAKEN BY SAT. WEAK HIGH PRESSURE OVER THE WESTERN HALF OF THE REGION WILL BEGIN MOVING EAST SAT THROUGH SUN AS A FRONTAL TROUGH MOVES INTO THE FAR NW CORNER SUN NIGHT FOLLOWED BY A COLD FRONT FORECAST TO ENTER THE AREA MON NIGHT. FRESH TO STRONG S TO SW FLOW WILL PREVAIL AHEAD OF THE FRONTAL TROUGH/FRONT STARTING SAT NIGHT. CARIBBEAN SEA AND THE TROPICAL N ATLANTIC ... TROUGH FROM THE MONA PASSAGE SW TO NEAR NW COAST OF COLOMBIA WILL EXTEND FROM THE N LEEWARD ISLANDS TO NEAR LA GUAJIRA PENINSULA BY SAT THEN WILL DRIFT WWD AND DISSIPATE LATE SAT INTO SUN. OTHERWISE WEAK PRES PATTERN WILL REMAIN ACROSS MOST OF THE AREA THROUGH TUE WITH MILD WINDS AND SLIGHT SEAS. EXPECT INCREASING WINDS AND BUILDING SEAS ACROSS THE EASTERN CARIBBEAN AND THE TROPICAL N ATLC MON AND TUE AS HIGH PRES FROM THE ATLC BUILDS ACROSS THE TROPICAL N ATLC INTO THE NE CARIBBEAN. WARNINGS.. ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER DGS