000
AGXX40 KNHC 280645
MIMATS

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
245 AM EDT SUN JUL 28 2013

MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN
SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND
64W...AND THE SW N ATLANTIC INCLUDING THE BAHAMAS.

...GULF OF MEXICO...                                        
MODEL PREFERENCE: GFS/OFFICIAL BLEND WITH GOOD CONFIDENCE.

WEAK HIGH PRES OVER THE SE GULF WILL PERSIST STRAITS OF FLORIDA 
THROUGH SUN NIGHT THEN SHIFT INTO THE NE GULF MON NIGHT. EXPECT 
GENTLE TO MODERATE E-SE WINDS ACROSS MOST OF THE REGION THROUGH 
THU EXCEPT LIGHT ANTICYCLONIC WINDS NEAR THE HIGH CENTER. ONLY 
EXCEPTION WILL BE WINDS TO 20 KT NEAR YUCATAN PENINSULA AT NIGHT 
DUE TO DIURNAL LOCAL EFFECTS. SEAS WILL REMAIN 3 FT OR LESS 
THROUGH THU...EXCEPT SW PART WHERE SEAS WILL RANGE FROM 3-5 FT.

...CARIBBEAN SEA AND TROPICAL N ATLANTIC...                    
MODEL PREFERENCE: GFS/OFFICIAL BLEND WITH GOOD CONFIDENCE.

PERSISTENT HIGH PRES RIDGE IN WEST-CENTRAL ATLC AND STATIONARY 
LOW PRES OVER NORTHERN SOUTH AMERICA WILL MAINTAIN MODERATE PRES 
GRADIENT ACROSS THE REGION WITH FRESH TO STRONG E WINDS EXPECTED 
TO CONTINUE IN THE CENTRAL CARIBBEAN FOR THE FORESEEABLE FUTURE. 
REMNANTS OF DORIAN NOW CLASSIFIED AS STRONG TROPICAL WAVE WILL 
BRIEFLY DISRUPT THE PRES GRADIENT AS IT PASSES N OF THE GREATER 
ANTILLES THROUGH TUE...ALLOWING WINDS TO DIMINISH SLIGHTLY IN 
THE CARIBBEAN. FAIRLY WEAK PRES PATTERN IN THE CENTRAL ATLC WITH 
AFRICAN MONSOON TROUGH EXTENDING WESTWARD TO AROUND 35W WILL 
KEEP WINDS RELATIVELY LOW IN THE TROPICAL N ATLC. EXPECT SEAS TO 
SUBSIDE TO 3-4 FT E OF THE WINDWARD ISLANDS BY MON NIGHT.

...SW N ATLANTIC W OF 55W INCLUDING THE BAHAMAS...               
MODEL PREFERENCE: GFS/OFFICIAL BLEND WITH GOOD CONFIDENCE.

PRIMARY FEATURES THAT WILL AFFECT THE MARINE WEATHER CONDITIONS 
THROUGH EARLY PART OF NEXT WEEK ARE A PERSISTENT HIGH PRES RIDGE 
IN WEST-CENTRAL ATLC AND REMNANTS OF DORIAN...NOW CLASSIFIED AS 
STRONG TROPICAL WAVE ALONG 58W...MOVING WESTWARD THROUGH THE S 
BAHAMAS. TIGHT PRES GRADIENT BETWEEN THESE TWO FEATURES WILL 
PRODUCE SWATH OF HIGHER WINDS AND SEAS ROUGHLY BETWEEN 24N AND 
27N IN THE SW N ATLC SUN NIGHT THROUGH WED. THE WAVE IS EXPECTED 
TO WEAKEN FURTHER AS IT APPROACHES FLORIDA BY WED...REDUCING THE 
EFFECTS IN THE W BAHAMAS. THE RIDGE AXIS IS EXPECTED TO REMAIN 
ALONG 29N THROUGH THE FORECAST PERIOD. MARINE WEATHER CONDITIONS 
N OF 27N ARE EXPECTED TO REMAIN FAIRLY CONSTANT WITH A GRADUAL 
DECREASE IN WINDS AND SEA HEIGHTS THROUGH THU.

$$

.WARNINGS...ANY CHANGES IMPACTING COASTAL NWS OFFICES WILL BE
COORDINATED THROUGH AWIPS 12 PLANET CHAT OR BY TELEPHONE:

.GULF OF MEXICO...
GMZ011...NONE.
GMZ013...NONE.
GMZ015...NONE.
GMZ017...NONE.
GMZ019...NONE.
GMZ021...NONE.
GMZ023...NONE.
GMZ025...NONE.

.CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN
55W AND 64W...
AMZ011...NONE.
AMZ013...NONE.
AMZ015...NONE.
AMZ017...NONE.
AMZ019...NONE.
AMZ021...NONE.
AMZ023...NONE.
AMZ025...NONE.
AMZ027...NONE.
AMZ029...NONE.
AMZ031...NONE.
AMZ033...NONE.
AMZ035...NONE.
AMZ037...NONE.
AMZ039...NONE.

.SW N ATLANTIC INCLUDING THE BAHAMAS...
AMZ111...NONE.
AMZ113...NONE.
AMZ115...NONE.
AMZ117...NONE.
AMZ119...NONE.
AMZ121...NONE.
AMZ123...NONE.
AMZ125...NONE.
AMZ127...NONE.

*FOR DETAILED ZONE DESCRIPTIONS PLEASE VISIT:
HTTP://WWW.NHC.NOAA.GOV/ABOUTTAFBPROD.SHTML#OWF

NOTE: GRIDDED MARINE FORECASTS ARE AVAILABLE IN THE
NATIONAL DIGITAL FORECAST DATABASE (NDFD) AT:
HTTP://WWW.NHC.NOAA.GOV/MARINE/GRIDS.PHP

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

$$
.FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.