000
AGXX40 KNHC 100705 RRA
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
305 AM EDT MON AUG 10 2009

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

WEAK RIDGE ACROSS THE NORTHERN GULF OF MEXICO. MOSTLY LIGHT 
WINDS ACROSS THE GULF. THE TWO EXCEPTIONS ARE IN THE WESTERN 
GULF WHERE TYPICAL EVENING/NIGHT WINDS AROUND 20 KT CAN BE FOUND 
WITHIN 90 NM OF THE YUCATAN AND S TO SE WINDS AROUND 15 KT CAN 
BE FOUND WHERE THE PRESSURE GRADIENT BETWEEN THE WESTERN EDGE OF 
THE ATLC RIDGE AND THE TROUGH OVER THE SOUTHERN HIGH 
PLAINS/MAINLAND MEXICO IS GREATEST. BY TUE...WINDS SHOULD 
DIMINISH IN THE NW GULF AS A COLD FRONT PUSHES SOUTH THROUGH THE 
PLAINS/MISSISSIPPI VALLEY...WEAKENING THE RIDGE AND SHIFTING IT 
FARTHER S. THE FRONT IS NOT EXPECTED TO MAKE IT INTO THE GULF.

A WEAK ATLC SURFACE TROUGH WILL LINGER OVER THE NORTHEASTERN SW 
N ATLC ZONE THROUGH TUE. SCATTERED SHOWERS MAY CONTINUE TO FOCUS 
NEAR THE TROUGH...BUT OTHERWISE JUST A SHIFT IN THE LIGHT WINDS 
ACROSS THE TROUGH. THE TROUGH SHOULD BEGIN DISSIPATING BY TUE 
AS WEAK HIGH PRES BUILDS ACROSS THE NORTHERN PORTION OF THE 
AREA. MOSTLY LIGHT WINDS ACROSS MOST OF THE AREA EXCEPT EASTERLY 
WINDS 15-20 KT S OF AROUND 22N. THESE CONDITIONS ARE EXPECTED TO 
CONTINUE THROUGH MID WEEK...THEN ELY WINDS INCREASE TO 20-25 KT 
S OF AROUND 24N AS A TROPICAL WAVE MOVING WEST THROUGH THE 
CARIBBEAN PASSES S OF THE AREA ON THU AND FRI. NWW3 SHOWS SEAS 
BUILDING TO 9 FT ACROSS THIS AREA E OF THE BAHAMAS THU/FRI.

STRONG TRADES ARE OVER THE S CENTRAL CARIBBEAN WITH WINDS IN THE 
20-25 KT RANGE AND UP TO 30 KT NEAR THE COAST OF COLOMBIA. WINDS 
ARE EXPECTED TO DIMINISH TO THE 20 KT RANGE OVER THE S CENTRAL 
CARIBBEAN WITH WINDS IN THE 20-25 KT RANGE NEAR THE COAST OF 
COLOMBIA BY TUE AS THE RIDGE TO THE NORTH IS DISRUPTED BY THE 
SURFACE TROUGHING OVER THE SW N ATLC ZONE. SEAS SHOULD SUBSIDE 
IN TURN...WITH MAX SEAS OF ONLY 9 FT EXPECTED BY TUE. WINDS WILL 
REMAIN RELATIVELY LIGHT ACROSS THE CARIBBEAN THE REMAINDER OF 
THE FORECAST PERIOD AS THE RIDGE TO THE NORTH REMAINS WEAK.


WARNINGS

ATLC...
.NONE. 

CARIBBEAN...
.NONE. 

GULF OF MEXICO...
.NONE.

$$
FORECASTER SCHAUER CLARK/DGS