000
AGXX40 KNHC 241900
MIMATS

MARINE WEATHER DISCUSSION        
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
300 PM EDT FRI APR 24 2009
 
MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND 
SOUTHWEST NORTH ATLC S OF 31N W OF 55W.

GULF OF MEXICO...
HEALTHY HIGH PRES CENTER 1027 MB JUST NE OF BASIN STRENTHENS AND 
MAINTAINS STEADY E TO SE FLOW ACROSS ENTIRE GULF THROUGH ENTIRE 
FORECAST PERIOD.  SEAS BUILD 8-9 FT UNDER STRONG WINDS TOPPING 
CLOSE TO 30 KT FLOWING DIRECTLY AGAINST E CURRENT ALONG STRAITS 
OF FLORIDA INDUCING HIGHER STEEPER WAVES OF 12 FT AND GREATER.  
WAVE MODELS GUIDANCE MIGHT NOT BE HANDLING THIS SITUATION WELL.  
 
SW N ATLC...
DEEP LAYER TROUGH THAT SUPPORTED SURFACE FRONTAL BOUNDARY 
SHIFTED NE EFFECTIVELY STALLING FRONT FROM BERMUDA TO WINDWARD 
PASSAGE.  MODERATE TO STRONG SUBSIDING AIR KEEPS WATERS AWAY 
FROM FRONTAL BOUNDARY FAIRLY DRY.  HEALTHY HIGH PRES 1027 MB 
BEHIND FRONT GETS UPPER SUPPORT AND STREGTHENS WHILE DRIFTING N 
OF 31N TONIGHT AND SAT.  THIS PRODUCES FRESH TO STRONG NE WINDS 
ACROSS ENTIRE BASIN WITH WINDS REACHING 30 KT NEAR STRAITS OF 
FLORIDA.  LONG FETCH ON SE SIDE OF RIDGE INCREASES SWELLS S OF 
25N MAINLY ACROSS PASSAGES TO GULF AND CARIBBEAN.  HIGH PRES 
GIVES HINT OF WEAKENING LATE TUE AND WED...BUT REINFORCING UPPER 
LEVEL LONGWAVE RIDGE MIGHT MAKE THIS MINOR.

CARIBBEAN AND TROPICAL N ATLC...
HEALTHY PRES GRADIENT PREVAIL FOR NEXT SEVERAL DAYS BETWEEN 
BUILDING RIDGE 1027 MB OVER SW N ATLC AND PREVAILING LOW PRES 
1010 MB OVER COLOMBIA.  THIS DRIVE TRADES TO NEAR 30 KT ALONG 
COAST OF COLOMBIA EXPANDING COVERAGE OF 20-25 KT ACROSS EASTERN 
CARIBBEAN.  TROPICAL ATLC ALSO REMAIN UNDER FRESH TO STRONG 
TRADES E OF ISLANDS WITH SE PERIPHERY OF ATLC HIGH PRES RIDGE 
PRODUCING LONG FETCH AIMED AT AREA BUILDING NE SWELLS TO 10 FT 
BY SUN.

ATLC...
.NONE.. 

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

FORECASTER WALLY BARNES. TROPICAL PREDICTION CENTER.