000
AGXX40 KNHC 130759
MIMATS

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
400 AM EDT FRI APR 13 2012

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

GULF OF MEXICO...
WEAK HIGH PRES CENTER OVER SE STATES MAINTAINS STEADY E TO SE 
MODERATE TO FRESH BREEZE ACROSS BASIN TODAY AND TONIGHT.  
APPROACHING LOW PRES NEAR 1004 MB OVER CENTRAL TEXAS TIGHTENS 
GRADIENT CAUSING STRONG SE TO S RETURN FLOW W OF 90W SAT AND 
SUN.  LOW PRES SHIFT NE FOLLOWING SUPPORTING UPPER LEVEL SHORT 
WAVE AND ATLC RIDGE REBUILDS W INTO GULF OF MEXICO MON AND TUE 
DIMINISHING WINDS AND SEAS. 

CARIBBEAN SEA...
RETREATING ATLC HIGH PRES 1022 MB KEEP E-NE MODERATE TRADES 
ACROSS ENTIRE CARIBBEAN TODAY.  HIGH PRES STRENGTHENS TO 1028 MB 
AND REBUILDS S SAT AND SUN TIGHTENING GRADIENT AND INCREASING 
WINDS...MAINLY IN NORTHERN HALF OF BASIN...BUT SPREADING SW 
THROUGH MON AND TUE.  SEAS BUILD TO 9-12 FT...HIGHER IN ATLC 
PASSAGES. 

SW NORTH ATLANTIC S OF 31N W OF 55W...
COLD FRONT EXTEND FROM 31N68W TO 25N74W TO 25N80W MOVE E OUT OF 
AREA LATE TODAY.  HEALTHY HIGH PRES 1029 MB FOLLOWS COLD FRONT 
INTO SW N ATLC INCREASING N-NE WINDS MAINLY IN SOUTHERN HALF OF 
BASIN AND THROUGH ATLC PASSAGES INTO CARIBBEAN.  HIGH PRES DRIFT 
S COMPLETELY DOMINATING FLOW WITH FRESH TO STRONG CLOCKWISE FLOW 
ACROSS BASIN. 

NOTE... EFFECTIVE APR 3, 2012 AT 1800 UTC THE OFFSHORE WATERS
FORECAST ZONES CHANGED FOR THE CARIBBEAN AND SW N ATLANTIC AND
THE GULF OF MEXICO. ISSUANCE TIME FOR THE GULF OF MEXICO OFFSHORE
WATERS FORECASTS IS REFERENCED TO THE EASTERN TIME ZONE. FOR
DETAILS SEE WWW.NHC.NOAA.GOV/ABOUTTAFBPROD.SHTML#OWF

GRIDDED MARINE OUTPUT IS AVAILABLE AT 
WWW.NHC.NOAA.GOV/TAFB/GRIDDED_MARINE (LOWER CASE).

GULF OF MEXICO...
.NONE.

.CARIBBEAN SEA AND TROPICAL N ATLC...
.NONE.

.SW N ATLC...
.NONE.
    
FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORECASTER WALLY BARNES