000
AGXX40 KNHC 270740
MIMATS

MARINE WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
240 AM EST THU DEC 27 2007

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

UPPER LEVEL SUPPORT FOR COLD FRONT OVER CENTRAL GULF OF MEXICO 
IS WANING AS UPPER LEVEL SHORT WAVE SHIFT NE.  STILL GOOD WIND 
SHIFT AND STRONG GUSTY WINDS ALONG FRONTAL BOUNDARY ARE CAUSING 
SEAS AS HIGH AS 16 FT.  COLD FRONT EXPECTED TO MOVE QUICKLY E 
BUT LOSE ITS PUNCH AND BECOME DIFFUSE TONIGHT.  NEXT FRONT OFF 
TEXAS COAST EARLY FRI WILL REACH FROM BIG BEND FLORIDA TO 25N90W 
LATE SAT BEFORE ALSO LOSING ITS IDENTITY AND BECOMING DIFFUSE.  
MAIN CULPRIT FOR BOTH DEMISES IS WELL ANCHORED STRENGTHENING 
MID-UPPER LEVEL RIDGE WHICH REFUSES TO YIELD TERRAIN TO THESE 
TWO FRONTS.  

BIG PUNCH SHOULD ARRIVE EARLY MON WHEN A THIRD AND STRONGER COLD 
FRONT ENTERS NW GULF OF MEXICO WITH VERY STRONG NE WINDS ACROSS 
ENTIRE BASIN.  FRONTAL BOUNDARY WILL EXTEND FROM SW FLORIDA TO 
YUCATAN PENINSULA LATE MON WHEN SURGE FROM HIGH PRES TIGHTENS 
GRADIENT ACROSS NRN HALF OF BASIN AND NE WINDS INCREASE.   

ATLC COLD FRONT OFF FLORIDA E COAST EXTENDS THROUGH 31N73W TO 
NRN BAHAMAS.  FEATURE WEAKEN AND MOVE TO 31N68W TO 25N75W LATE 
THU AND DISSIPATE LATE FRI.  FAIRLY STRONG RIDGE BUILD OVER AREA 
BEHIND FRONT FRI THROUGH MON WITH INCREASING ELY WINDS.  

ATLC RIDGE TIGHTENS PRES GRADIENT WITH LOW PRES DEVELOPING OVER 
COLOMBIA RESULTING IN VERY STRONG E FLOW ACROSS MOST OF 
CARIBBEAN S OF 18N.  LITTLE CHANGE EXPECTED THROUGH FORECAST 
PERIOD. 

WARNINGS...
ATLANTIC...
NONE.

CARIBBEAN...
NONE. 

GULF OF MEXICO...
NONE.

FORECASTER WALLY BARNES