000
AGXX40 KNHC 211821
MIMATS

MARINE WEATHER DISCUSSION   
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
215 PM EDT FRI APR 21 2006

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

IN THE ATLC...LONGWAVE TROUGH NEAR 65W WILL CONTINUE TO MOVE E 
THROUGH TONIGHT AND E OF 55W BY LATE SUN...AS A SHORTWAVE RIDGE 
AXIS MOVES INTO THE AREA SUN INTO MON. THEN BY LATE MON INTO WED 
A SHORT WAVE TROF WILL MOVE THROUGH THE N PORTION OF THE AREA. 
AT THE SFC...A WEAKENING FRONT WILL MOVE E OF 55W TONIGHT AS OF 
WEAK RIDGE MOVES INTO THE AREA FROM THE W SAT INTO LATE 
SUN...THEN WEAKENING BY MON INTO WED. THE MODELS IN AGREEMENT 
AND GOING WITH GFS.

IN THE CARIBBEAN...SHORTWAVE RIDGING BUILDING OVER THE AREA 
LATER TONIGHT INTO MON...THEN WEAKENING LATE MON INTO WED. 
AT THE SFC...HIGH PRES JUST N OF AREA WILL CONTINUE TO BUILD AND 
SLOWLY DRIFT TO THE S...AS LOW PRES ALONG THE COLOMBIA COAST 
SLOWLY INCREASES SAT INTO LATE MON...THIS PATTERN WILL INCREASE 
THE PRES GRADIENT OVER THE S CARIBBEAN WITH MOSTLY WINDS IN THE 
20 TO 25 KT RANGE...EXCEPT TO 30 KT NEAR THE COLUMBIA COAST SAT 
INTO EARLY MON...IN AGREEMENT WITH GFS.

GULF OF MEXICO...WATCHING A PROGRESSIVE SHORTWAVE TROF MOVING E 
ACROSS THE NRN GULF THROUGH SAT EVE. THEN BY SUN INTO MON WEAK 
HIGH PRES WILL MOVE INTO THE AREA AND PREVAIL TUE INTO WED. AT 
THE SFC...A SIGNIFICANT BUT FAST MOVING COLD FRONT WILL MOVE 
ACROSS THE NRN GULF TONIGHT INTO LATE SAT...THEN FOLLOWED BY 
WEAK HIGH PRES BUILDING INTO THE WATERS SUN INTO MON AND THEN 
SLOWLY WEAKENING BY TUE INTO WED...WITH SOME INCREASE IN THE 
WINDS OVER THE S GULF MON INTO TUE DURING THE AFTERNOON. MOSTLY 
FOLLOWING THE GFS. 

WARNINGS...

ATLANTIC...
NONE.

CARIBBEAN...
NONE.

GULF OF MEXICO...
NONE.

FORECASTER HGM