000
AGXX40 KNHC 201732
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
130 PM THU JUL 20 2006

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

GULF OF MEXICO...
RIDGE CURRENTLY ALONG 29N IN THE GULF WITH LIGHT WINDS AND 
FAIRLY CALM SEAS OVER MOST OF THE BASIN. THE ONLY EXCEPTION ARE 
10-15 KT EASTERLIES WITH SCATTERED TSTMS OVER THE SOUTHERN BAY 
OF CAMPECHE. RIDGE WILL SETTLE SLOWLY SWD TO ALONG 25N BY LATE 
SAT AS A BONAFIDE COLD FRONT APPROACHES THE AREA BUT BEGINS TO 
WEAKEN ALONG THE GULF COAST SAT NIGHT WITH SW WINDS OF 10 KT 
EXTENDING DOWN TO 26N. OUTLOOK...RIDGE REMAINS ALONG 25N SUN
BUT LIFTS NWD TO ALONG 28N BY TUE AS FRONTAL TROUGH OVER THE SE 
U.S./GULF COAST DISSIPATES. TROPICAL WAVE MOVES THROUGH BAY OF 
CAMPECHE SAT AND SUN WITH SOME INCREASE IN WINDS. 

SW N ATLC...
SFC TROUGH EXTENDS FROM 31N73W NEWD TO 29N66W DRIFTING TO THE 
NW. THIS FEATURE IS EXPECTED TO DISSIPATE FRI IN THE FACE OF THE 
WRN ATLC RIDGE.  APPROACHING FRONTAL TROUGH OVER THE SE CONUS 
ALLOWS SW WINDS TO INCREASE OVER THE AREA W OF 73W BY LATE SAT
AND TO 20-25 KT OVER THE AREA N OF 29N W OF 72W BY SUN. IN THE 
MEANTIME ATLC RIDGE BEGINS TO BUILD WWD ALONG 30N65W 26N80W
WITH SE TRADES PICKING UP TO 15-20 KT ON THE S SIDE OF THE RIDGE 
OVER AREAS S OF 23N. RIDGE REMAINS STATIONARY MON AND LIFTS 
SLOWLY NWD TO ALONG 31N67W 28N81W BY LATE TUE WITH 15-20 KT 
TRADES S OF 25N.  

CARIBBEAN AND TROPICAL N ATLC...
TROPICAL WAVE OVER THE CARIBBEAN ALONG 81W/82W THIS MORNING 
CONTINUES MOVING WWD 15 KT. THIS MORNINGS 1036 UTC QUIKSCAT PASS
DEPICTED 20-25 KT SE TRADES BEHIND THE WAVE AXIS OVER THE 
CARIBBEAN BETWEEN 67W AND 78W. ANOTHER TROPICAL WAVE ALONG 53W 
WAS APPROACHING THE TROPICAL N ATLC ZONE WITH LIGHTER WINDS 
GENERALLY ON THE ORDER OF 15 TO LOCALLY 20 KT. THE FIRST WAVE 
MOVES W OF THE AREA BY EARLY SAT AND CARRIES MOST OF THE STRONG 
WINDS WITH IT AND ALLOWS FOR A BREAK IN THE SW CARIBBEAN TRADES 
WITH 20-25 KT MOST AREAS ALTHOUGH THERE MAY BE LOCAL 30 KT WINDS 
ALONG THE COAST OF COLOMBIA SAT. ON SUN...BUILDING ATLC RIDGE 
COMBINED WITH THE WWD MOVING SECOND TROPICAL WAVE ALLOWS TRADES 
TO INCREASE TO 25-30 KT WITH GALES ALONG THE N COAST OF S 
AMERICA LATE SUN AND ALONG THE COAST OF COLOMBIA BY MON. AREA OF 
WINDS MOVES INTO W CARIBBEAN MON AND THEN SLOWLY DECREASES TO 
LESS THAN GALE FORCE BY TUE. GFS STILL INDICATING 50 KT 925 MB 
WINDS AND 35 KT 30 M WINDS LATE SUN INTO MON...ALTHOUGH THE 
COVERAGE IS SLIGHTLY LESS THAN PREVIOUS RUNS. NONETHELESS THERE 
ARE ENOUGH WINDS IN THE FCST TO CONTINUE WARRANTING A HEADLINE 
FOR GALES LATE SUN AND MON.       
 
.WARNINGS...
ATLC...NONE.
CARIBBEAN...GALE CONDITIONS EXPECTED SUN AND MON...AMZ084 AND 
AMZ086. 
GULF OF MEXICO...NONE.

FORECASTER COBB