000 AGXX40 KNHC 200627 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 230 AM EDT SUN APR 20 2008 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO...A COLD FRONT FROM FL BIG BEND TO THE CENTRAL GULF THEN STATIONARY TO W BAY OF CAMPECHE WILL MOVE TO THE SE GULF TONIGHT THEN BE REINFORCED BY A SECONDARY COLD SURGE WHICH WILL DRIVE THE FRONT S OF AREA BY SUNSET MON. RETURN FLOW ALREADY OVER THE W WATERS WILL CONTINUE THROUGH THU WHILE NE TO E FLOW OVER THE EASTERN WATERS IN WAKE OF THE FRONT THROUGH THU. SW ATLC AND TROPICAL ATLC...A WEAK COLD FRONT WILL MOVE INTO THE NW WATERS TODAY AND STALL JUST E OF THE N FL COAST. A FRONTAL TROUGH FROM 27N55W TO 22N65W ATTM IS STILL EXPECTED TO MEANDER IN THE SAME AREA THROUGH MON...THEN LIFT N IN RESPONSE TO A SECONDARY COLD FRONT THAT WILL MOVE SE INTO THE NW WATERS AND MERGE WITH THE QUASI STATIONARY BOUNDARY. A LOW PRES WILL DEVELOP NEAR 30N77W TUE NIGHT THEN MOVE SE TO NEAR 26N72W THU TRAILING A WEAK COLD FRONT S TO HISPANIOLA. GRADIENT NW QUADRANT OF THE LOW WILL SUPPORT NE 15-20 KT. CARIBBEAN...A WEAK FRONTAL TROUGH WILL MOVE INTO THE NORTHERN WATERS OF THE TROPICAL ATLC ZONE AND GRADUALLY WASH OUT THROUGH TUE. THE ATLC RIDGE WILL THEN SHIFT S AND LIE E TO W ALONG WED THROUGH FRI. THIS WILL RELAX THE TRADES ELSEWHERE. WARNINGS... ATLC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. .FORECASTER NELSON. TROPICAL PREDICTION CENTER.