000
AGXX40 KNHC 200611 RRA
MIMATS

MARINE WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
200 AM EDT FRI AUG 20 2010

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

WEAK 1016 MB HIGH PRES IS OVER THE EASTERN GULF OF MEXICO NEAR 
26N84W WITH RIDGE EXTENDING NW TOWARD GALVESTON TEXAS. THE 
COMBINATION OF THE RIDGE AND A TROPICAL WAVE MOVING THROUGH THE 
YUCATAN PENINSULA AND THEN INTO THE BAY OF CAMPECHE WILL PRODUCE 
ELY WINDS 20 KT OVER THE S PORTION OF THE MIDDLE GULF AND THE SW 
GULF TODAY THROUGH SAT NIGHT THEN THE WINDS DECREASE THROUGH THE 
DAY SUN AS THE WAVE MOVES TO THE WEST. HIGH PRES RIDGE BUILDS 
ALONG 25N LATE SUN AND MON THENTHE RIDGE WEAKENS TUE.

ATLC RIDGE ALONG 27N WITH LIGHT WINDS ACROSS THE ENTIRE AREA
GENERALLY 10 KT OR LESS. THE WINDS WILL INCREASE OVER THE SE 
PORTION OF THE AREA AS THE N END OF A TROPICAL WAVE MOVES 
THROUGH THE AREA MON AND TUE. SW WINDS ARE FORECAST TO INCREASE 
OVER THE NW PORTION OF THE AREA MON AND TUE AS LOWER PRES 
DEVELOPS OVER THE SE U.S. COMBINED WITH THE ATLC RIDGE TIGHTENS 
THE PRES GRADIENT.

TROPICAL WAVE MOVING THROUGH THE FAR WESTERN CARIBBEAN HAS 
INCREASED THE ELY WINDS TO 20 KT N OF AROUND 15N W OF 83W. 
EARLIER SHIP REPORTS INDICATED SEAS UP TO 8 FT. AS THE WAVE 
MOVES TO THE W THE PRES GRADIENT BETWEEN THE WAVE AND THE ATLC 
RIDGE WILL KEEP STRONG WINDS THROUGH TONIGHT THEN SLOWLY 
DECREASE ON SAT. OTHERWISE MOSTLY LIGHTER THEN NORMAL TRADES 
ACROSS THE REMAINDER OF THE CARIBBEAN. HOWEVER WINDS PICK UP TO 
AROUND 20 KT OVER THE S CENTRAL CARIBBEAN SUN AND MON THEN 
DECREASE ON TUE.

WARNINGS...

SW N ATLC...
.NONE.

CARIBBEAN...
.NONE.

.GULF OF MEXICO...
.NONE.

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORECASTER DGS