000
AGXX40 KNHC 070641
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
130 AM EST THU DEC 7 2006

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

A LARGE UPPER TROUGH DIGGING SWD TONIGHT OVER THE N CENTRAL 
CONUS WILL BEGIN TO AFFECT OUR REGION S OF 31N LATE DAY 1. 
FAIRLY STRONG SRN BRANCH OF WESTERLIES CROSSING NRN GULF AHEAD 
OF TROUGH. BROAD MID LEVEL RIDGE OVER E CENTRAL ATLC EXTENDS WSW 
ACROSS NW CARIB. ON SURFACE TONIGHT WEAKENING STATIONARY FRONT 
OVER ATLC WATERS ALONG 28N E OF 70W WILL GRADUALLY DISSIPATE. 
MODERATE TO FRESH ELY TRADES OVER ATLC E OF 65W AND CARIB E OF 
75W. GULF WINDS MOSTLY LIGHT. 

LATER DAY 1 MID LEVEL HEIGHTS CONTINUE FALLING OVER GULF AND 
ATLC W OF 75W AS STRONG UPPER TROUGH DIGS SWD. ON SURFACE LATER 
DAY 1 COLD FRONT RACES SE OVER GULF WITH INCREASING NLY WINDS TO 
25 KT. PREFRONTAL TROUGH MOVES E OF FL TO NEAR 75W. REST OF AREA 
ABOUT THE SAME. 

FOR DAY 2 UPPER TROUGH AXIS SWINGS OFF ERN SEABOARD OF CONUS 
WITH STRONG NWLY FLOW DIGGING SE. MID LEVEL RIDGE BUILDS AHEAD 
OF TROUGH ALONG 50W. ON SURFACE DAY 2 A 1037 MB HIGH DROPS S TO 
ERN TX WITH GALE CONDITIONS OVER MUCH OF GULF. COLD FRONT MOVES 
RAPIDLY E AND SE AND NLY WINDS 20 TO 30 KT SPREADING RAPIDLY 
OVER BAHAMAS AND NW CARIB. MODERATE HIGH OVER ERN ATLC MAINTAINS 
FAIRLY STRONG ELY TRADES E OF 60W. 

OUTLOOK PERIOD...

UPPER TROUGH PUSHES EWD DAY 3 TO 70W GRADUALLY LOOSING AMPLITUDE 
AS IT MOVES EWD. MID LEVEL RIDGING DEVELOPS OVER GULF NWD. LARGE 
MID LEVEL RIDGE HOLDS FROM NE CARIB TO 35N35W. ON THE SURFACE 
DAY 3 FAIRLY STRONG HIGH 1033 MB MOVES RAPIDLY EWD TO CAR COAST 
MAINTAINING GUSTY NE WINDS OVER ATLC W OF FRONT THAT MOVES E OF 
65W. GULF WINDS DECREASE BUT STILL GUSTY TO 25 KT. FRONT REMAINS 
OVER W CENTRAL CARIB STALLING OVER WINDWARD PASSSAGE. LITTLE 
CHANGE TO ELY TRADES. 

FOR DAY 4 WITH UPPER TROUGH MOVING TO 55W..MID LEVEL FLOW 
BECOMES MORE WLY. NEW SHORTWAVE TROUGH MOVES TO 93W ASSOCIATED 
WITH SRN BRANCH OF WESTERLIES. ON SURFACE DAY 4 HIGH PRESSURE 
SLOWLY WEAKENING OFF CAR COAST WILL STILL MAINTAIN STRONG NE 
WINDS OVER MUCH OF REGION. RETURN FLOW BEGINS OVER GULF W OF 
90W.

FOR DAY 5 MID LEVEL TROUGHING HANGS ON ALONG 50W..SEPARATING 
HIGH PRES OVER ERN ATLC AND OVER NW CARIB. SHORTWAVE TROUGH MOVE 
TO 80W WHILE FLOW BEHIND TROUGH BECOMES MORE SWLY. ON SURFACE 
DAY 5 OLD HIGH PRESSURE SPREADS EWD WITH FAIRLY STRONG GRADIENT 
S OF 31N..THUS ELY WINDS REMAIN 20 TO 25 KT E OF 90W TO CENTRAL 
ATLC. NW GULF WINDS SELY 10 TO 15 KT.  


WARNINGS...
ATLANTIC...
NONE.

CARIBBEAN...
NONE.

GULF OF MEXICO...
GALE CONDITIONS EXPECTED GULF GMZ080..GMZ082 AND GMZ084 THU 
NIGHT AND FRI.