000 AGXX40 KNHC 190555 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 200 AM EDT THU JUN 19 2008 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO...HIGH PRES 1012 MB QUASI STATIONARY AT 28N93W. A TROPICAL WAVE IS MOVING W THROUGH THE WESTERN BAY OF CAMPECHE ATTM. AN ATLC RIDGE EXTENDS W ALONG 23N THROUGH THE STRAITS OF FL TO A SHARP CREST AT 23N84W. A WEAK COLD FRONT IS STALLING FROM 28N82W TO 29N90W AS FORECAST. ALOFT...AN UPPER RIDGE HAS SHIFTED SE OF THE AREA AS AN UPPER TROUGH OVER THE CENTRAL GULF SWINGS E WITH UPPER DIFFLUENCE E OF ITS AXIS ENHANCING CONVECTION ALONG THE FRONT E OF 83W AND OVER THE EASTERN STRAITS OF FL NEAR THE CAY SAL BANK. STILL EXPECTING THE ATLC RIDGE TO BUILD FROM FL STRAITS TO NW GULF...THEN SHIFT N THIS AFTERNOON PUSHING THE FRONTAL REMNANTS NE OF THE FL BIG BEND EARLY TONIGHT. THE RIDGE WILL LIE ALONG 27N FRI NIGHT WITH THE W CENTRAL GULF HIGH PRES APPEARING LATER IN THE WEEKEND AND MEANDERING IN SAME AREA THROUGH MON. SE RETURN FLOW WILL MAX AT 15 KT...WITH MAX SEAS 3-4 FT...ALONG THE PERIPHERY OF THE RIDGE...ROUGHLY ALONG A BAND FROM THE YUCATAN PENINSULA TO THE TX COAST WITH WSW 15 KT OVER THE NE WATERS SAT NIGHT AND SUN AS THE GRADIENT TIGHTENS WITH ANOTHER WEAK FRONT MOVING SE THROUGH THE MISSISSIPPI VALLEY. CARIBBEAN AND TROPICAL ATLC WATERS...ELY TRADES ARE AT 20-30 KT OVER THE CENTRAL CARIBBEAN AND 15 KT OVER THE WATERS W OF 80W AND 15-20 KT E OF 72W. A BROAD TROPICAL WAVE IN THE CENTRAL ATLC NEAR 47W IS MOVING W AT 18 KT AND SHOULD BE ALONG 55W TONIGHT AND INTO E CARIBBEAN JUST BEFORE FRI NIGHT...ALONG 65W SUNRISE SUN AND ALONG 78W SUNRISE MON ACCOMPANIED BY A REINFORCING E 20-25 KT TRADES OVER WATERS S OF ABOUT 17N. SW ATLC...AN E TO W RIDGE LIES ALONG 23-24N AS EXPECTED. A WEAK COLD EXTENDS FROM 31N77W TO 28N80W. THE E PORTION OF THE FRONT IS FORECAST TO CONTINUE E REACHING NEAR 31N70W TONIGHT AND PASS E OF BERMUDA AROUND SUNSET FRI THEN E OF 31N55N SUNSET SAT. SW WINDS INCREASE TO 20-25 KT AHEAD OF FRONT. THE W PORTION OF THE FRONT WILL STALL BRIEFLY OVER N FL THEN LIFT OUT TO THE NE LATE FRI NIGHT AND SAT ALLOWING A WESTERN ATLC RIDGE TO BUILD SW TO CENTRAL FL SAT. FURTHER S THE NORTHERN EXTENSION OF A TROPICAL WAVE WILL MOVE W THROUGH WATERS N OF PUERTO RICO LATE SAT AND INTO THE SE BAHAMAS SUN NIGHT INTO MON. WARNINGS... ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. .FORECASTER NELSON. TROPICAL PREDICTION CENTER.