000
AGXX40 KNHC 180555
MIMATS

MARINE WEATHER DISCUSSION   
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
200 AM EDT TUE APR 18 2006

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

UPPER LEVEL...
WELL ANCHORED ANTICYCLONIC CENTER IN CENTRAL CARIBBEAN AT 14N74W 
HAS RIDGE EXTEND ACROSS YUCATAN PENINSULA INTO GULF OF MEXICO.
VERY DRY CONDITIONS DUE TO MODERATE TO STRONG SUBSIDENCE COVER 
ENTIRE SW N ATLC..CARIBBEAN EXCEPT THIN SWATH OF TROPICAL 
MOISTURE FOLLOW A WEAK 30 KT SUBTROPICAL JET ACROSS NICARAGUA/ 
HONDURAS TO JAMAICA.  PATCH OF UPPER MOISTURE AMID GULF OF 
MEXICO IS ONLY FEATURE OVER DRY EXTENSION.  JET STREAM 90 KT 
DIGS DOWN ALONG UPPER LEVEL TROUGH ENTERING SW N ATLC ASSOCIATED 
WITH WEAK COLD FRONT DIGGING S INTO FORECAST WATERS. 

TROUGH MOVE E OF 65W SAT WITH RIDGE REBUILDING OVER ATLC AND 
GULF OF MEXICO.  

SURFACE...
COLD FRONT MOVE S INTO SW N ATLC AREA TODAY AND MOVE TO 31N65W 
TO CENTRAL BAHAMAS WED THEN DRIFT TO 31N55W TO HISPANIOLA THU 
AND E OF AREA FRI.  RIDGE RE BUILD OVER SW N ATLC FRI AND SAT.
WEAK PRES PATTERN WILL MAINTAIN EASTERLY TRADES IN CARIBBEAN AND 
TROPICAL ATLC WEAKER THAN USUAL TROUGH PERIOD.
       
WARNINGS...

ATLANTIC...
NONE.

CARIBBEAN...
NONE.

GULF OF MEXICO...
NONE.

FORECASTER WALLY BARNES