000
AGXX40 KNHC 111819
MIMATS

MARINE WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL
230 PM EDT MON APR 11 2011

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

GULF OF MEXICO...
HIGH PRES OVER SW N ATLC MAINTAINS STEADY MODERATE TO FRESH S-SE 
WIND FLOW ACROSS ENTIRE GULF.  SOUTHERLY RETURN FLOW MAINLY W OF 
90W IN ADVANCE OF WEAK COLD FRONT ENTERING NW GULF THIS 
AFTERNOON.  E OF 90W WIND DIMINISHES AS HIGH PRES CENTER DRIFT E 
FORCED BY WEAK COLD FRONT PRESENTLY NEAR 70W.  

COLD FRONT LOSES UPPER SUPPORT WED BUT MANAGES TO DRIFT OUT OF 
BASIN WED AND ALLOW NEW RIDGE TO BUILD ACROSS GULF.  WIND FLOW 
REMAINS SE TO S AHEAD OF SECOND WEAK COLD FRONT OFF SE TEXAS 
COAST LATE FRI.  THIS FRONT BRINGS FRESH TO STRONG NE BEHIND 
FRONTAL BOUNDARY...BUT IS ALSO LEFT WITHOUT SUPPORT ACROSS 
EASTERN HALF OF GULF BY SAT.

SW N ATLC W OF 55W...
RIDGE EXTENDS FROM BERMUDA TO NW BAHAMAS FORCED E BY INCOMING 
COLD FRONT ENTERING NW CORNER THIS AFTERNOON.  FRONT STALLS WED 
AS IT LOSES UPPER SUPPORT AND BECOMES DIFFUSE THU.   WEAK RIDGE 
BUILDS BEHIND FRONT INCREASES S RETURN FLOW TO A FRESH BREEZE W 
OF 75W ONLY TO BE FORCED E BY SECOND COLD FRONT APPROACHING NE 
CORNER LATE SAT.  GUIDANCE SUGGEST FRONTAL WAVE TO DEVELOP ALONG 
FRONT E OF 55W BUT STRONG WINDS COULD PROMPT MODERATE TO LARGE 
NE SWELLS LATE IN FORECAST PERIOD.

CARIBBEAN SEA AND TROPICAL N ATLC...
INCREASED CLOUDINESS OVER EASTERN CARIBBEAN AS WEAK TROUGH 
SUPPLIES LOW LEVEL CONVERGING MOISTURE AND UPPER LEVEL 
DIFFLUENCE COMBINE TO PRODUCE SCATTERED CONVECTION E OF 67W.  
ELSEWHERE WIND FIELD EASES PRES GRADIENT AS CENTRAL ATLC RIDGE 
BUDGES E DIMINISHING EASTERLY TRADES AND SLIGHT SEAS THROUGHOUT 
ENTIRE BASIN.   

WARNINGS..

ATLC...
.NONE.

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORECASTER WALLY BARNES