000
AGXX40 KNHC 181903
MIMATS

MARINE WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL
310 PM EDT MON APR 18 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.

SOUTHWEST N ATLC W OF 55W...
WEAK STATIONARY FRONT FROM 31N70W TO 27N77W DISSIPATES TONIGHT 
WITH 1021 MB HIGH PRES CENTER BUILDING IN ITS PLACE.  DEEP LAYER 
CYCLONIC VORTEX PRESENTLY IS REFLECTED AT THE SURFACE AS A VERY 
PERSISTENT TROUGH ALONG 56W FROM 13N TO 23N.  MODEL GUIDANCE IN 
GOOD AGREEMENT WITH ITS NW DRIFT ALBEIT MINOR DIFFERENCES IN 
STALLING LONGITUDE.  MOST SOLUTIONS SHOW DEVELOPMENT OF 1013 MB 
LOW PRES CENTER NEAR 25N62W THU THEN DRIFT N-NE OUT OF ZONE BY 
LATE FRI.  TIGHT GRADIENT ON NORTHERN HALF OF TROUGH BRINGS 
EASTERLY WINDS TO NEAR GALE FORCE WITH SEAS REACHING 13-15 FT 
ALTHOUGH ONLY STRONG NE BREEZE AND 9-10 FT SEAS ARE EXPECTED TO 
IMPACT WATERS W OF 65W.   

CARIBBEAN SEA AND TROPICAL ATLC W OF 55W...
LIGHT TO MODERATE E-SE WINDS PERSIST THROUGH FORECAST PERIOD 
ACROSS ENTIRE CARIBBEAN AND TROPICAL ATLC S OF 18N.  DEEP LAYER 
TROUGH PRESENTLY ALONG 56W DRIFT INTO NW CORNER OF TRPCL ATLC 
AND DEVELOPS LOW PRES LATE THU JUST N OF 22N BUT MOST IMPACTING 
WEATHER REMAIN N OF ZONES WITH 7-9 FT NE SWELLS MOVING INTO 
TRPCL ATLC AND THRU ANEGADA AND MONA PASSAGES.  

GULF OF MEXICO...
HIGH PRES CENTER 1020 MB OVER NE GULF OF MEXICO NEAR 29N85W 
MAINTAINS STEADY FLOW OF FRESH SE BREEZE ACROSS ENTIRE BASIN 
THROUGH MON NIGHT.  DROPPING PRES OVER CENTRAL PLAINS AND NE 
MEXICO TIGHTEN GRADIENT OVER WRN HALF OF GULF AND PUSH WIND 
SPEEDS TO STRONG BREEZE THROUGH REMAINDER OF FORECAST PERIOD.  

WARNINGS..

ATLC...
.NONE.

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

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

$$
FORECASTER WALLY BARNES