000
AGXX40 KNHC 211847
MIMATS

MARINE WEATHER DISCUSSION     
NWS NATIONAL HURRICANE CENTER MIAMI FL
300 PM EDT THU JUL 21 2011

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...
HIGH PRES RIDGE ALONG 27N STRETCH ACROSS ENTIRE GULF TIGHTENS 
GRADIENT WITH LOW PRES OVER CENTRAL PLAINS PROMPTING MODERATE TO 
FRESH S-SE BREEZE W OF 94W.  OTHERWISE BASIN APPEARS TAME WITH 
LIGHT AND VARIABLE WINDS AND SLIGHT SEAS N OF RIDGE AXIS AND 
MODERATE E BREEZE AROUND SOUTHERN PERIPHERY.  CONDITIONS 
EXPECTED TO CHANGE LITTLE IN SPITE OF WEAK TROPICAL WAVE WHICH 
ENTERS GULF LATE TONIGHT AND CONTINUES MOVING W THROUGH SUN. 
SECOND AND MUCH STRONGER TROPICAL WAVE EXPECTED TO AFFECT 
EXTREME SOUTHEASTERN GULF BY END OF FORECAST PERIOD. 

SW N ATLC...
TROPICAL STORMS BRET AND CINDY HAVE BOTH MOVED WELL N OF AREA 
AND HAVE LITTLE OR NO EFFECTS ON MARINE CONDITIONS WITHIN SW N 
ATLC ZONE.  HIGH PRES RIDGE STRETCH ALONG 28N EXPECTED TO DRIFT 
N TO 29N/30N AS STRONG TROPICAL WAVE MOVES ALONG ITS SOUTHERN 
PERIPHERY.  WAVE PRESENTLY EXPECTED TO AFFECT EXTREME SE PART OF 
ZONE EARLY SUN THROUGH MON.  RIDGE AXIS SWINGS BACK S AFTER ITS 
PASSAGE. 
 
CARIBBEAN SEA AND TROPICAL N ATLC W OF 55W... 
AFOREMENTIONED HIGH PRES RIDGE OVER SW N ATLC PROMPTS STEADY 
FRESH TO STRONG E-NE TRADES ACROSS MOST OF CENTRAL CARIBBEAN.  
CONDITIONS DETERIORATE FURTHER WITH PROXIMITY OF INTENSIFYING 
TROPICAL WAVE ENTERING TROPICAL ATLC FRI AND CROSSING EASTERN 
CARIBBEAN SAT AND SUN.  UPPER LEVEL CYCLONE OVER HISPANIOLA MAY 
ENHANCE DIVERGENT CONDITIONS AHEAD OF TROPICAL WAVE FRI AND SAT 
INCREASING CONVECTION.  WINDS AND SEAS DETERIORATE ACCORDINGLY 
AS WAVE MAKES IT WAY ACROSS CARIBBEAN.  

WARNINGS...

GULF OF MEXICO...
.NONE.
 
SW N ATLC...
.NONE.

CARIBBEAN AND TROPICAL N ATLC...
.NONE.

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

$$
FORECASTER WALLY BARNES