000
AGXX40 KNHC 280645
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
300 AM EDT TUE JUL 28 2009

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

GULF OF MEXICO...
AN UPPER-LEVEL LOW HAS DEVELOPED OVER THE SW GULF GENERATING 
SOME SHOWER ACTIVITY WHILE A WEAK UPPER-LEVEL TROUGH IS FORECAST 
TO LINGER ACROSS THE FLORIDA PENINSULA ALSO PRODUCING SOME 
CLOUDINESS AND A FEW SHOWERS OVER THE SE PORTION OF THE GULF. 
BROAD RIDGE OF HIGH PRESSURE REMAINS IN PLACE OVER THE REGION... 
EXTENDING OUT FROM THE 1028 MB SFC HIGH LOCATED NEAR 33N58W. 
THIS RIDGE WILL PERSIST ACROSS THE NORTH GULF WATERS THROUGH THE 
FORECAST PERIOD WITH GENERALLY E TO SE WINDS OF 5 TO 10 KT OVER 
THE E GULF...AND SE TO S WINDS OF 10 TO 15 KT OVER THE W GULF. 
OCCASIONALLY 20 KT WINDS CAN BE EXPECTED OVER THE BAY OF 
CAMPECHE AND ALONG THE YUCATAN COAST DURING THE LATE EVENING AND 
EARLY MORNING HOURS EACH DAY FROM TODAY THROUGH THU. A 
TIGHTENING PRES GRADIENT BETWEEN LOW PRES FORMING OVER WEST 
TEXAS AND THE SURFACE RIDGE OVER THE GULF WILL ALLOW SE RETURN 
FLOW OVER THE NW GULF TO INCREASE TO 15 TO 20 KT THROUGH THU 
WITH SEAS UP TO 6 FT. 

CARIBBEAN...
AN EARLIER QUIKSCAT PASS AND SSMI SHOWED AN AREA OF 25 TO 30 KT 
WINDS OVER THE CENTRAL CARIBBEAN. STRONG WINDS WILL PERSIST OVER 
THIS REGION THROUGH THE REMAINDER OF THE WEEK BETWEEN HIGH PRES 
TO THE NORTH...DEEPENING LOW PRES OVER THE EASTERN PACIFIC AND 
COLOMBIA...AND AS A PAIR OF TROPICAL WAVES MIGRATE THROUGH THE 
BASIN. ONE OF THIS TROPICAL WAVE IS ALREADY MOVING ACROSS THE 
AREA WITH AXIS ALONG 73W AT 28/0600Z. STRONG TRADES WILL ALSO 
DEVELOP OVER THE NE AND N CENTRAL CARIBBEAN STARTING TODAY AS 
HIGH PRES BUILDS N OF THE AREA. SEAS UP TO 14 FT WILL PERSIST 
OVER THE SW CARIBBEAN BY THE COLOMBIAN COAST...AND WILL BUILD TO 
15 FT PER NWW3 OVER THE N CENTRAL CARIBBEAN BY WED IN E SWELL. 
NOAA BUOY 42058 NEAR 15N75W IS ALREADY REPORTING 10 FT SEAS. 
ANOTHER TROPICAL WAVE PRESENTLY ALONG 48W S OF 15N MOVING W NEAR 
20 KT WILL REACH THE E CARIBBEAN BY THE MIDDLE OF THIS WEEK... 
FURTHER SUPPORTING THE STRONG WINDS. NE WINDS OF 20 TO 25 KT AND 
SEAS TO 7 FT WILL ALSO AFFECT THE WINDWARD PASSAGE LATE WED INTO 
THU. OCCASIONALLY 20 KT WINDS CAN ALSO BE EXPECTED OVER THE GULF 
OF HONDURAS MAINLY AROUND 0000Z INCREASING TO 25 KT THU EVENING 
AS THE AREA OF STRONG TRADE WINDS EXPANDS WWD. WINDS AND SEAS 
ARE EXPECTED TO SLIGHTLY DIMINISH ACROSS THE CARIBBEAN ON FRI.  

ATLANTIC S OF 31N W OF 55W...
A SURFACE RIDGE EXTENDS FROM THE N CENTRAL ATLC TO JUST SOUTH OF 
BERMUDA...THROUGH THE NORTHERN BAHAMAS INTO THE GULF OF MEXICO. 
WINDS ARE GENERALLY 10 TO 15 KT AROUND THE SURFACE RIDGE... 
ALTHOUGH 20 TO 25 KT E FLOW IS NOTED N OF PUERTO RICO AND 
HISPANIOLA PER A QSCAT PASS. THESE FRESH TO STRONG WINDS WITH 
BUILDING SEAS OF UP TO 9 FT ARE EXPECTED TO PERSIST MAINLY SOUTH 
OF 22N THROUGH MIDWEEK AS HIGH PRES BUILDS NEAR BERMUDA WITH THE 
RIDGE EXTENDING ALONG 28N/29N.

WARNINGS

ATLC...
.NONE. 

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

$$

FORECASTER GR