000
AGXX40 KNHC 281725
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
130 PM EDT SAT JUL 28 2007

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

SW N ATLC...A TRANQUIL BASIN SUDDENLY CHANGED SCENES WHEN A 15 
KT SW WIND SHIP REPORT WAS OBSERVED AT 1200Z.  CLOUD SHAPE AND 
QUIKSCAT PASS SUPPORTED POSSIBILITY OF CLOSE CIRCULATION 
DEVELOPING JUST E OF NRN BAHAMA ISLANDS.  BACKING UP THESE 
OBSERVATIONS WAS GFS WITH GOOD POSITION AND PRES INITIALIZATION 
FOLLOWED BY ACCEPTABLE NE TRACKING OF LOW PRES CENTER.    

LOW PRES WILL INTENSIFY AS STEERING CURRENTS DRIVE IT NE WITH SW 
WINDS 20-25 KT BUILDING SEAS TO 11 FT BY THE TIME IT CROSSES 31N 
ON NW SIDE OF REBUILDING 1023 MB HIGH PRES CENTER NOW OVER 
CENTRAL ATLC.  RIDGE BUILDS WWD TUE AND WED SQUEEZING GRADIENT 
ON E AND SE QUADRANTS OF LOW PRES...BUT DECREASING TO LIGHT 
WINDS AS SOON AS LOW PRES EXITS REGION AND 1022 MB HIGH PRES 
SITS OVER BASIN.  

CARIBBEAN SEA...
BUILDING HIGH PRES AND ASSOCIATED RIDGE EXPANDING WWD CAN ONLY 
MEAN TIGHTER GRADIENT FOR CARIBBEAN SRN HALF.  MODERATE E WINDS 
TURN STRONG SUN AS LOW PRES OVER COLOMBIA REFUSES TO MOVE AND 
RIDGE EXTENSION SQUEEZES BETWEEN BOTH LOW PRESSURES. 

.GULF OF MEXICO...
WEAK LOW PRES FORMS OVER N GULF NEAR TEXAS-LOUISIANA BORDER 
INCREASING SW WINDS N OF 28N BETWEEN 90W AND 93W TONIGHT.  LOW  
PRES MOVES NE INLAND SUN RETURNING LIGHT WINDS AND SEAS LESS 
THAN 3 FT TO MOST OF BASIN.  

WARNINGS...
ATLANTIC...
NONE.

CARIBBEAN...
NONE.

GULF OF MEXICO...
NONE.

FORECASTER WALLY BARNES