000
AGXX40 KNHC 120544
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 
145 AM TUE SEP 12 2006

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

COLD FRONT EXTENDS FROM 32N65W ACROSS S FL INTO E GULF OF 
MEXICO. FRONT EXPECTED TO MOVE E WITH DRAGGING A WEAK BOUNDARY 
SE INTO THE NW CARIBBEAN TONIGHT. THE NE PORTION OF THE FRONT 
WILL MERGE WITH TROPICAL CYCLONE GORDON THU WHILE THE SOUTHERN 
EXTENSION OF THE FRONT WILL DISSIPATE AS ATLC RIDGE BUILDS W 
ALONG 23N...TO THE S OF GORDON...ACROSS SE BAHAMAS THU AND 
ACROSS NORTHERN CUBA FRI INTO SE GULF OF MEXICO...THEN RIDGE 
BEGINS TO SHIFT E AGAIN ON SAT.

ANOTHER COLD FRONT WILL MOVE SE INTO NW GULF OF MEXICO LATE 
TONIGHT AND CONTINUE SE EXTENDING FROM FL BIG BEND TO SE TX 
SUNRISE THU...AND FROM 32N75W TO SE FL BECOMING QUASI STATIONARY 
TO SE TX SUNRISE FRI. AT SUNRISE SAT...THE FRONT WILL EXTEND 
FROM 32N70W ACROSS NW BAHAMAS THEN LOSING ITS PUSH OVER SE FL 
WITH BROAD FRONTAL REMNANTS DRIFTING N OVER GULF OF MEXICO ALONG 
25N.

WHILE FLORENCE CONTINUES MOVING NE ALONG ATLC FRONT ITS 
ASSOCIATED SWELLS WILL GRADUALLY DECREASE TO 8 FT OVER ATLC 
WATERS W OF 70W LATE THU. BY FRI SLY FLOW AHEAD OF FRONT WILL 
INCREASE WIND WAVE AGAIN ATLC WATERS N OF BAHAMAS. THIS FRONT IS 
EXPECTED TO KEEP THE INTENSIFYING TROPICAL CYCLONE GORDON E OF 
OFFSHORE WATERS ALONG 65W...BUT TRACK N OVER DISCUSSION AREA 
BETWEEN 65W-55W THROUGH SAT. GFS/NWW3 NOT HANDLING THIS SYSTEM 
VERY WELL SO I WILL BUILD WIND FIELD AND RADIUS OF SEAS ON 
GRAPHICS ALONG NHC FORECAST TRACK.   

ELY TRADES NEAR 20 KT ALONG THE S AMERICAN COAST THROUGH THE 
PERIOD. ELY TRADES SHOULD INCREASE TROPICAL ATLC WATERS AS RIDGE 
LIES ALONG 23N-24N LATE WEEK. 

NEW TROPICAL WAVE FAR E ATLC ALONG 19N HAS LARGE CYCLONIC 
ENVELOPE AND GFS IS ALL OVER THIS SYSTEM TAKING IT TO TS 
STRENGTH TONIGHT. I WILL CONSERVATIVELY MOVE A 20-30 KT LOW PRES 
W THROUGH WATERS E OF DISCUSSION AREA ON GRAPHICS THROUGH 72 
HOURS WITH MENTION OF POSSIBLE TROPICAL CYCLONE DEVELOPMENT. 
SHOULD EXPECT AT LEAST LARGE SWELLS TO AFFECT TROPICAL ATLC ZONE 
DAY 5.

WARNINGS...

ATLANTIC...
TS WARNING N OF 21N E OF 60W...AMZ087...BUT SHIFTING N OF AREA 
EARLY 1ST PERIOD.

CARIBBEAN...
NONE. 

GULF OF MEXICO...
NONE.

FORECASTER NELSON