000
AGXX40 KNHC 121728
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
135 PM EDT SAT APR 12 2008

MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND 
SOUTHWEST NORTH ATLC S OF 31N W OF 55W.

GULF OF MEXICO...
THE NOW CONVECTIVE COLD FRONT HAS TEMPORALLY SLOWED OVER THE 
CENTRAL GULF WATERS BUT A SECONDARY COLD AIR SURGE...CURRENTLY 
NOTED IN WATER VAPOR OVER OKLAHOMA...IS EXPECTED TO SWEEP SE AND 
PUSH THE FRONT TO A POSITION FROM SW FL TO YUCATAN PENINSULA 
AROUND SUNRISE SUN...AND THEN PUSH FRONT SE OF AREA LATE SUN 
AFTERNOON. STRONG N WINDS IN WAKE OF FRONT STILL EXPECTED TO 
REACH MINIMAL GALE FORCE BRIEFLY OVER THE SW GULF ZONE SUN THEN 
QUICKLY DIMINISH SUN NIGHT. N WINDS WILL ALSO DIMINISH OVER NW 
GULF WATERS SUN NIGHT BECOMING LIGHT/VARIABLE ALONG RIDGE AXIS 
PUSHING E INTO THE NW WATERS ALONG 28N. ELSEWHERE THE SECONDARY 
SURGE WILL BACK N WINDS BEHIND FRONT TO NW THROUGH MON NIGHT. 
THEREAFTER THE PARENT SURFACE HIGH RACES E ACROSS SE CONUS ALONG 
34N VEERING WINDS TO E-SE ALL GULF WATERS WED INCREASING TO 
15-20 KT WED NIGHT AND THU ALONG SOUTHERN AND W PERIPHERY OF 
GULF.

SW N ATLC...
THE REMNANT FRONTAL BOUNDARY STILL MEANDERING FROM 23N55W TO 
MONA PASSAGE PER A FEW SHIP REPORTS THIS MORNING. E SWELL TO 8 
FT STILL NOTED OVER WATERS S OF 25N E OF 70W. SW RETURN FLOW 
ALREADY AT 15-20 KT FAR NW ATLC WATERS AS COLD FRONT OVER GA 
APPROACHES. THIS FRONT OR AT LEAST ITS PRE-FRONTAL WIND SHIFT 
EXPECTED TO PUSH OFF THE GA COAST LATE THIS AFTERNOON. SECONDARY 
COLD SURGE OVER CENTRAL CONUS ATTM IS EXPECTED TO SWEEP SE OFF 
CONUS MON AND REINFORCE THE WEAKENING NW POST FRONTAL FLOW AND 
PUSH THE SLOWING FRONT OVER THE CENTRAL WATERS TO E OF 65W THU. 
EXPECT MAX SEAS TO 13 FT IN N SWELL ARRIVING NW BAHAMAS TUE 
NIGHT. 

CARIBBEAN AND TROPICAL NORTH ATLANTIC...
A QSCAT PASS AROUND 00Z INDICATES NE 20-25 KT WINDS NEAR THE 
COAST OF COLOMBIA AND E 20-25 KT IN THE GULF OF HONDURAS. 
OTHERWISE...NE TO E TRADES ARE STILL FAIRLY RELAXED DUE TO THE 
WEAK PRES PATTERN OVER THE SUBTROPICAL W AND CENTRAL ATLC. 
HOWEVER...SUBTROPICAL RIDGING WILL GAIN STRENGTH INCREASING THE 
E TRADES OVER THE TROPICAL N ATLC AND THE E CARIBBEAN SUN.
THESE WINDS COMBINED WITH NE AND E SWELL WILL RESULT IN SEAS TO 
10 FT SUN THROUGH TUE OVER THE TROPICAL N ATLC WATERS. OTHERWISE 
A COLD FRONT ENTERS THE YUCATAN CHANNEL LATE SUN AFTERNOON. 
BEHIND THE FRONT...N WINDS WILL INCREASE TO 20 AND POSSIBLY A 
BRIEF 25 KT AND BUILD SEAS TO 8 FT W OF 84W. BY WED...N WINDS OF 
15-20 KT WILL FUNNEL WELL S ALONG THE CARIBBEAN COAST NICARAGUA.

WARNINGS...

ATLC...
NONE. 

CARIBBEAN...
NONE.

GULF OF MEXICO...
GMZ082...GALE CONDITIONS EXPECTED SUN.

FORECASTER NELSON