000
AGXX40 KNHC 091821
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
200 PM EST TUE JAN 9 2007

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

UPPER LEVELS...
MID LATITUDE LONGWAVE TROUGH EXTENDS SW ACROSS SW N ATLC INTO SW 
CARIBBEAN WITH VERY DRY AIR MASS PRACTICALLY COVERING BOTH 
BASINS EXCEPT FOR MOISTURE ADVECTED NE AHEAD OF UPPER LEVEL 
LONGWAVE TROUGH NOW ACROSS ERN CONUS. NARROW UPPER LEVEL RIDGE 
BETWEEN BOTH TROUGHS HAS FLATTENED CREST ALLOWING WRN TROUGH TO 
MOVE ALONG NRN FRINGES OF SW N ATLC.  

UPPER LEVEL CUT OFF CYCLONIC CIRCULATION AT 22N61W HAS NO 
INFLUENCE ON FORECAST AREA WEATHER EXCEPT EXTEND DRY AIR MASS 
FURTHER E INTO TROPICAL ATLC.  VORTEX SHOULD DRIFT NW AIMLESSLY 
AND BE ABSORBED BY MID LATITUDE TROUGH.

AT THE SURFACE...
ENTIRE GULF OF MEXICO UNDER HIGH PRES RIDGE THROUGH EARLY SUN 
WITH NEW COLD FRONT APPROACHING SE TEXAS COAST BY LATE SUN. 
WINDS AND SEAS EXPECTED TO BE HIGHER THAN NORMAL AS RIDGE GETS 
REINFORCED THU.

SW N ATLC
COLD FRONT FROM 31N70W TO N CUBA WILL EXIT BASIN BY LATE WED 
NIGHT AND HIGH PRES TAKE OVER ENTIRE AREA.  REINFORCING SURGE ON 
RIDGE WILL SIGNIFICANTLY INCREASE WINDS AND SEAS THU THROUGHOUT 
MOST SW N ATLC EXCEPT NORTHERNMOST LATITUDES TILL SUN.  RIDGE 
FINALLY BEGINS EWD DRIFT FORCED BY COLD FRONT ENTERING GULF OF 
MEXICO SUN. 

COLD FRONT JUST CROSSED YUCATAN PASSAGE WILL BE ALONG 21N72W TO 
E NICARAGUA WED THEN BECOMES DIFFUSE.  STRONG NE WIND AND TRADES 
ALONG COAST OF COLOMBIA INCREASE WITH REINFORCED ATLC RIDGE 
THROUGH SUN WHEN RIDGE PULLS BACK EAST.

WARNINGS...
ATLANTIC...
NONE.

CARIBBEAN...
NONE.

GULF OF MEXICO...
NONE.

FORECASTER WALLY BARNES