000
AGXX40 KNHC 221823
MIMATS

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
223 PM EDT THU AUG 22 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: PREVIOUS FORECAST BLENDED WITH LATEST GFS AND 
MWW3 WITH HIGH CONFIDENCE.

HIGH PRESSURE RIDGE PREVAILS N OF THE AREA ACROSS THE GULF COAST
STATES. THERE IS A WEAK PRESSURE GRADIENT OVER THE GULF WATERS.
LATEST SATELLITE DERIVED WINDS AND SEAS ALONG WITH SHIP AND BUOY
DATA DEPICT GENTLE TO LIGHT WINDS ACROSS MUCH OF THE GULF EXCEPT
FOR LIGHT TO MODERATE WINDS OVER THE E GULF. SEAS ARE THE 1-3 FT
RANGE OVER MUCH OF THE GULF EXCEPT 3-4 FT OVER THE E GULF WATERS.
A TROPICAL WAVE WILL MOVE INTO THE SE GULF WATERS TONIGHT AND
CONTINUE TO MOVES WESTWARD ACROSS THE GULF WATERS...REACHING THE
YUCATAN PENINSULA ON FRI...THEN MOVING ACROSS THE SW GULF THIS
WEEKEND. A WEAK PRESSURE GRADIENT WILL PREVAIL ACROSS THE GULF
WATERS THROUGH THE FORECAST PERIOD WITH LITTLE CHANGE IN
CONDITIONS EXPECTED.

...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN
55W AND 64W 

MODEL PREFERENCE: PREVIOUS FORECAST BLENDED WITH LATEST GFS AND 
MWW3 WITH HIGH CONFIDENCE.

A TROPICAL WAVE IS MOVING THROUGH THE WESTERN CARIBBEAN. LATEST
SATELLITE DERIVED WINDS AND SEAS ALONG WITH SHIP AND BUOY DATA
DEPICT FRESH TO STRONG WINDS PREVAIL OVER THE CENTRAL CARIBBEAN
WITH GENTLE TO MODERATE TRADES PREVAILING OVER THE REMAINDER OF
THE CARIBBEAN AND THE TROPICAL N ATLC WATERS. SEAS ARE IN THE 7-9
FT RANGE OVER THE CENTRAL CARIBBEAN...3-6 FT RANGE OVER THE
EASTERN AND WESTERN CARIBBEAN...AND 4-5 FT OVER THE TROPICAL N
ATLC WATERS. THE TROPICAL WAVE IN THE WESTERN CARIBBEAN WILL
CONTINUE MOVING WESTWARD OVER THE NEXT 24 HOURS...THEN MOVE W OF
THE AREA BY FRI NIGHT. A SECOND TROPICAL WAVE WILL MOVE INTO THE
TROPICAL N ATLC WATERS BY THIS WEEKEND...THEN REACH THE EASTERN
CARIBBEAN SUN AND THE CENTRAL CARIBBEAN ON MON. THE TROPICAL
WAVE IS NOT EXPECTED TO BRING MUCH OF AN IMPACT TO THE WINDS AND
SEAS...AND CONDITIONS ACROSS THE FORECAST AREA ARE NOT EXPECTED TO
VARY MUCH THROUGH THE FORECAST PERIOD.

...SW N ATLANTIC INCLUDING THE BAHAMAS... 

MODEL PREFERENCE: PREVIOUS FORECAST BLENDED WITH LATEST GFS AND 
MWW3 WITH HIGH CONFIDENCE.

THE NORTHERN PART OF A CARIBBEAN TROPICAL WAVE MOVED ACROSS THE
FAR SW WATERS AND THE FLORIDA STRAITS TODAY. A RIDGE OF HIGH
PRESSURE PREVAILS N OF THE FORECAST AREA ALONG 32N. LATEST
SATELLITE DERIVED WINDS AND SEAS ALONG WITH SHIP AND BUOY DATA
DEPICT LIGHT TO GENTLE WINDS OVER MUCH OF THE FORECAST AREA EXCEPT
FOR MODERATE WINDS PREVAILING OVER THE SW WATERS. SEAS ARE IN THE
3-4 FT RANGE OVER MUCH OF THE FORECAST WATERS. THE RIDGE ALONG 32N
IS FORECAST TO BEGIN TO SHIFT S FRI WHILE WEAKENING AS A WEAK
COLD FRONT PUSHES SOUTHWARD INTO THE FAR NW PORTION SUN. THE COLD
FRONT WILL WEAKEN AND BECOME STATIONARY ON MON NEAR 30N. HIGH PRES
WILL BUILD BEHIND THE FRONT WHICH WILL BRING MODERATE NE-E WINDS
TO THE FAR NW CORNER ON MON WITH SEAS BUILDING TO NEAR 6 FT. A
RATHER LIGHT PRES GRADIENT IS EXPECTED ELSEWHERE WITH RELATIVELY
LIGHT WINDS AND SEAS.
 
$$

.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 AL. NATIONAL HURRICANE CENTER.