000 AGXX40 KNHC 060649 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 250 AM EDT SAT JUN 06 2009 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. SUBTROPICS... A DEEP LAYERED TROUGH DOMINATES THE EASTERN GULF OF MEXICO WITH ITS MEAN AXIS ALONG 85W ATTM. THE TROUGH IS EXPECTED TO SHIFT E ACROSS FL TODAY AND TONIGHT INTO MON THEN GRADUALLY FILL AS IT LIFTS NE OF AREA TUE. A SURFACE COLD FRONT EXTENDS FROM THE FL BIG BEND SE TO 22N91W WITH SHOWERS AND TSTMS ENHANCED E OF THE FRONT EXTENDING ACROSS ALL OF FL AND PORTIONS OF THE ATLC W OF 72W. A SURFACE LOW IS EXPECTED TO DEVELOP OVER SE GA TODAY AND MEANDER THROUGH THE WEEKEND WITH A SERIES OF TROUGHS ROTATING SE ACROSS THE NE GULF AND FL THROUGH EARLY SUN NIGHT. A RIDGE WILL BUILD E TO W ALONG 27N-28N FROM THE CENTRAL ATLC TO THE NW GULF OF MEXICO. SLY RETURN FLOW WILL SET UP AT 15 KT OVER THE W GULF AROUND THE PERIPHERY OF THE RIDGE AND ALSO OVER THE NW ATLC N OF THE RIDGE WITH BOTH AREAS DIMINISHING TO 10 KT BY SUNRISE SUN. CARIBBEAN AND TROPICAL ATLC W OF 55W... THE ATLC RIDGE N OF THE AREA COMBINED WITH BROAD LOW PRES OVER NORTHERN S AMERICA WILL CONTINUE TO SUPPORT FRESH ELY TRADES WINDS E OF 80W WITH WINDS AND SEAS DIMINISHING SLIGHTLY LATER THIS WEEKEND AS THE ATLC RIDGE TO THE N WEAKENS. UNCERTAINTY REMAINS CONCERNING THE DEVELOPMENT...PSN AND STRENGTH...OF A LOW LEVEL TROUGH OVER THE W CARIBBEAN NEAR THE NICARAGUAN AND HONDURAN COASTS OVER THE NEXT FEW DAYS. WILL CONTINUE WITH THE PREVIOUS TREND OF BROAD LOW PRESSURE OVER THE W CARIBBEAN THROUGH MON THEN WILL DEPICT LOW PRES NEAR 15N84W 1010 MB MON NIGHT INTO TUE WITH WINDS IN THE 20 RANGE AND MAX SEAS OF 8 FT OVER THE NW CARIBBEAN. A TROPICAL WAVE CURRENTLY ALONG 55W HAS BEEN MOVING W AT 18 KT OVER THE PAST 24 HOURS AND THIS MOTION WILL MOVE THE WAVE INTO THE E CARIBBEAN AROUND SUNSET TODAY REACHING ALONG 75W LATE WED. ELY WINDS INCREASE TO 15 TO 20 KT WITH SEAS TO 9 FT WITH A LARGE AREA OF AFRICAN DUST E OF THE WAVE AXIS. WARNINGS ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FORECASTER NELSON. TROPICAL PREDICTION CENTER.