000 AGXX40 KNHC 050821 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 415 AM EDT SUN APR 05 2009 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... STRONG SHORTWAVE TROUGH DIGGING ACROSS CENTRAL TEXAS ENHANCING CYCLOGENESIS OVER DRY LINE PUSHING STRONG COLD FRONT INTO NW GULF OF MEXICO WATERS LATE TODAY. SWATH OF TROPICAL MOISTURE ADVECTED INTO SYSTEM ACROSS CENTRAL MEXICO BY LONGWAVE TROUGH ADDS TO RECIPE OF OMINOUS WEATHER COMING. EXPECT COLD FRONT TO MOVE QUICKLY ACROSS GULF OF MEXICO PRODUCING GALE FORCE WINDS S OF 25N W OF 93W AND VERY STRONG NE OVER REMAINDER OF BASIN THROUGH TUE. HEALTHY 1029 MB HIGH PRES BEHIND COLD FRONT SITS OVER CENTRAL GULF WED AND DRIFTS INTO EASTERN GULF AND FLORIDA THU INCREASING S RETURN FLOW OVER GULF W OF 90W. NWW3 GUIDANCE 00Z RUN JUMPS SEA HEIGHT FROM 3-4 FT AT 06/00Z TO LARGE AREA OF 12-13 FT AT 06/06Z. FORECAST RISES SEAS WELL BEFORE 06/00Z. SW N ATLC... WEAK HIGH PRES CENTER 1016 MB JUST OFF FLORIDA COAST DRIFTING E BEHIND COLD FRONT NOW FROM 31N63W TO 26N70W THEN STATIONARY TO 26N80W. HIGH PRES MAINTAINS SUBSIDING DRY AIR MASS UNDER ITS COVERAGE EXCEPT WITHIN 180 NM OF FRONT AXIS. SECOND COLD FRONT SWEEPING THROUGH GULF OF MEXICO ENTERS SW N ATLC EARLY MON FORCING NEAR GALE FORCE SW WINDS WITHIN 360 NM AHEAD OF FRONTAL BOUNDARY AND EXPECT GALE FORCE WINDS W OF AXIS THROUGH MON NIGHT. CARIBBEAN... ABOVE MENTIONED FRONT ENTER CARIBBEAN BASIN LATE MON OR MON NIGHT BRINGING STRONG N-NE WINDS INTO NW WATERS...BUT BY LATE TUE IT STALLS AND BECOMES DIFFUSE ACROSS CENTRAL CARIBBEAN. AS FRONT FORCES ATLC HIGH PRES TO MOVE EASTWARD...PRES GRADIENT IS RELAXED AND TRADES BECOME LIGHT TO MODERATE ACROSS MOST OF BASIN EXCEPT MODERATE TO STRONG ALONG COAST OF COLOMBIA IN NW QUADRANT OF 1008 MB LOW PRES OVER COLOMBIA. ATLC... .GALE CONDITIONS EXPECTED N OF 29N MON AND MON NIGHT...AMZ080... CARIBBEAN... NONE. GULF OF MEXICO... GALE CONDITIONS EXPECTED S OF 25N W OF 93W MON AND MON NIGHT... GMZ082... FORECASTER WALLY BARNES. TROPICAL PREDICTION CENTER.