000
AGXX40 KNHC 171810
MIMATS

MARINE WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
210 PM EDT FRI AUG 17 2012

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

GULF OF MEXICO...
WESTERN EXTENSION OF ATLC RIDGE ALONG 27N REACHES FROM CENTRAL 
FLORIDA TO SOUTHERN TEXAS. LIGHT TO MODERATE ANTICYCLONIC FLOW 
PREVAILS ACROSS MOST OF THE GULF. NOTABLE EXCEPTION IS IN SW 
GULF...WHERE A DEVELOPING AREA OF LOW PRES CENTERED NEAR 20N95W 
HAS HIGH POTENTIAL TO BRIEFLY INTENSIFY INTO A TROPICAL CYCLONE 
WITHIN THE NEXT 12-24 HOURS. GLOBAL MODELS SHOW THE LOW TRACKING 
NNW ALONG THE COAST OF MEXICO BEFORE MOVING INLAND SAT AFTERNOON 
OR EVENING. A BROAD AREA OF LOW PRES IS EXPECTED TO PERSIST OVER 
NE MEXICO AND SOUTHERN TEXAS THROUGH WED...SUPPORTING FRESH SE 
WINDS OVER THE WESTERN GULF NEXT WEEK.

CARIBBEAN SEA AND TROPICAL N ATLC W OF 55W...
A TROPICAL WAVE ALONG 62W IS MOVING RAPIDLY WESTWARD ACROSS THE 
EASTERN CARIBBEAN. IT IS EXPECTED TO SWEEP ACROSS THE CENTRAL 
CARIBBEAN THIS WEEKEND AND MOVE INTO WESTERN PORTIONS BY MON. 
HIGH PRES RIDGE N OF THE AREA ALONG 27N WILL SUPPORT FRESH WINDS 
ALL ACROSS THE CARIBBEAN THROUGH MON WITH E WINDS INCREASING TO 
20-25 KT IN THE CENTRAL CARIBBEAN TUE AND WED AS PRES GRADIENT 
BECOMES TIGHTER N OF CUBA. ESE WINDS WILL ALSO PICK UP IN THE 
GULF OF HONDURAS EARLY NEXT WEEK...WITH SEAS BUILDING TO 6-7 FT. 
ANOTHER TROPICAL WAVE IN THE CENTRAL ATLC ALONG 38W IS EXPECTED 
TO MOVE INTO THE TROPICAL N ATLC TUE.

SOUTHWEST NORTH ATLC S OF 31N W OF 55W...
SEMI-PERMANENT SUBTROPICAL HIGH S OF BERMUDA WILL SLOWLY SHIFT W 
THROUGH WED...WITH A RIDGE EXTENDING WEST ALONG 27N TO S CENTRAL 
FLORIDA. A TROPICAL WAVE S OF 22N ALONG 62W WILL MOVE RAPIDLY 
ACROSS SOUTHERN WATERS THIS WEEKEND...HELPING TO ENHANCE WINDS S 
OF 23N. A WEAK TROUGH OVER THE SE UNITED STATES SAT INTO MON WILL
INCREASE THE PRES GRADIENT OVER THE NW PORTIONS WITH MODERATE TO 
FRESH WSW WINDS EXPECTED N OF THE RIDGE AXIS.

NOTE...GRIDDED MARINE FORECAST IS AVAILABLE AT 
WWW.NHC.NOAA.GOV/TAFB/GRIDDED_MARINE

GULF OF MEXICO...
.NONE.

CARIBBEAN SEA...
.NONE.

SW N ATLANTIC...
.NONE.

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

$$
FORECASTER MUNDELL