000
AGXX40 KNHC 080807
MIMATS

MARINE WEATHER DISCUSSION         
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
315 AM EDT WED APR 08 2009

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

UPPER LEVELS...
BROAD MID-UPPER LEVEL RIDGE OVER CENTRAL MEXICO MOVE OVER GULF 
OF MEXICO THU AND FRI.  PRESENT LONG WAVE TROUGH LIFTS NE TAKING 
UPPER LEVEL SUPPORT AWAY FROM COLD FRONT PRESENTLY OVER SW N ATLC
SLOWING IT TO STALL JUST E OF 65W THU THEN DISSIPATE FRI.  
CARIBBEAN UNDER VERY DRY SUBSIDING AIR MASS UNDER RIDGE CENTERED 
OVER SOUTH AMERICA.  WEAK TROUGH OVER TROPICAL ATLC ALLOWS SOME 
TROPICAL MOISTURE TO EMERGE ACROSS BASIN S OF 15N BUT WITH NO 
SIGNIFICANT WEATHER NOTED NOR EXPECTED.  

GULF OF MEXICO...
HIGH PRES 1023 MB OVER WESTERN GULF SHIFT E ALONG 26N TO EASTERN 
GULF TONIGHT MAINTAIN LAX PRES GRADIENT ACROSS ENTIRE BASIN WITH 
MOSTLY LIGHT WINDS.  S OF 25N E OF 90W HAS LINGERING SWELLS FROM 
RECENT FRONTAL PASSAGE SUBSIDING VERY QUICKLY.  S RETURN FLOW 
WINDS W OF 90W INCREASE TONIGHT THROUGH FRI AS WEAK COLD FRONT 
ENTERS NW GULF AND STALLS N OF 25N FRI NIGHT AND SAT.  WITH SO 
WEAK PUSH...DO NOT EXPECT WINDS TO REACH ABOVE MODERATE 
STRENGTH.   

SW N ATLC...
COLD FRONT STALLS FROM 25N65W TO HISPANIOLA TODAY AND TONIGHT 
EXPECTED TO DISSIPATE BY EARLY FRI.  HIGH PRES OVER S CENTRAL FL 
THU SHIFT E-NE ALONG 27N REACHING 65W LATE FRI WITH RIDGE W TO 
27N80W EXPECTED TO KEEP WINDS BELOW 20 KT ACROSS ENTIRE BASIN 
THROUGH SUN.   

CARIBBEAN...
COLD FRONT FROM E CUBA TO NRN NICARAGUA STALLS FROM HISPANIOLA 
TO NICARAGUA LATE TODAY THEN DISSIPATE LATE THU.  STRONG N WINDS 
DIMINISH QUICKLY AS FRONT WASHES OUT AND VEER E AS TRADES ARE 
ENHANCED BY BUILDING RIDGE OVER SW N ATLC.  WINDS ALONG COLOMBIA 
COASTAL SECTIONS INCREASE AS 1010 MB LOW PRES TIGHTENS GRADIENT 
WITH ATLC RIDGE. 

ATLC...
.NONE.. 

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

FORECASTER WALLY BARNES. TROPICAL PREDICTION CENTER.