000
AGXX40 KNHC 061740
MIMATS

MARINE WEATHER DISCUSSION   
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
140 PM EDT SAT MAY 06 2006

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

ALOFT...A LONGWAVE TROUGH DOMINATES THE EASTERN CONUS AND 
WESTERN N ATLC. AN EMBEDDED SHORTWAVE HAS ITS MEAN AXIS ALONG 
85W AND EXTENDS S OVER THE SE CONUS TO A BASE NEAR THE WINDWARD 
PASSAGE. A SECOND SHORTWAVE IS OVER THE ATLC ROUGHLY ALONG 
50W AND EXTENDS S JUST E OF 55W TO BASE NEAR 24N48W. A SHORTWAVE 
RIDGE EFFECTIVELY SEPARATES THESE TWO TROUGHS...AND ORIGINATES 
FROM AN UPPER ANTICYCLONE OVER TRINIDAD NEAR 10N60W...WITH A 
RIDGE EXTENDING N ALONG 22N70W 32N70W TO A CREST STILL 
AMPLIFYING NNE NEAR 50N55W. 

AT THE LOW LEVELS...A HIGH PRES 1017 MB IS NEAR 23N70W...AND IS 
EXPECTED TO SHIFT NE PASSING SE OF BERMUDA TONIGHT. THE 
ASSOCIATED RIDGE THAT CURRENTLY EXTENDS NW ACROSS FL AND THE 
GULF OF MEXICO ALONG 26N WILL CONTINUE QUASI-STATIONARY E TO W 
ALONG ROUGHLY 25N THROUGH WED. THE RIDGE WILL RETRACT EASTWARD 
OVER THE GULF OF MEXICO IN ADVANCE OF A WEAK COLD FRONT MOVING 
OFF THE TX COAST WED NIGHT AND CONTINUING E OFF THE GA COAST 
AROUND SUNRISE FRI...WITH FRONTAL REMNANTS DISSIPATING ACROSS N 
FL AND THE NE GULF EARLY WED. 

THE GRADIENT IS EXPECTED TO TIGHTEN THE SLY RETURN FLOW SW GULF 
BUT IT WILL LIKELY PULSE REACHING 20 KT DURING THE AFTERNOON 
THEN WEAKEN AGAIN AT NIGHT. THE STANDARD NE 20 KT EXPECTED ALONG 
THE NW COAST OF COLUMBIA AND 15-20 KT ELY TRADES ACROSS THE 
CENTRAL CARIBBEAN WATERS. SLY FLOW INCREASE TO 20 KT NW ATLC 
JUST AHEAD OF FRONT THU NIGHT. OTHERWISE WINDS LESS THAN 20 KT 
AND SEAS LESS THAN 8 FT THROUGH OUTLOOK PERIOD. 

WARNINGS...
NONE.  

FORECASTER NELSON