000
AGXX40 KNHC 180658
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
300 AM EDT SUN OCT 18 2009

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

GULF OF MEXICO...
STRONG HIGH PRES IN THE WAKE OF A COLD FRONT CURRENTLY OVER THE 
FAR NW CARIBBEAN DOMINATES THE ENTIRE GULF REGION PRODUCING 20 
TO 30 KT NLY WINDS. AN EARLIER QSCAT PASS ALONG WITH SFC DATA 
AND BUOY OBSERVATIONS CONFIRMED THESE WIND SPEEDS. BUOY 42055 IN 
THE SW PORTION OF THE GULF REPORTED NE WINDS OF 31 KT AND 
COMBINED SEAS OF 12 FT. THE HIGH PRES WILL WEAKEN AND BEGIN TO 
SHIFT E OF THE AREA SUN ALLOWING FOR WINDS AND SEAS TO DIMINISH. 
ANOTHER COLD FRONT IS EXPECTED TO MOVE INTO THE FAR NW GULF THU 
WHILE THE REMNANTS OF FIRST FRONT LIFT N AS A WARM FRONT ACROSS 
THE GULF E OF 90W. MODERATE SLY RETURN FLOW WILL DEVELOP W OF 
96W WED IN ADVANCE OF NEXT COLD FRONT ACROSS TEXAS.  

CARIBBEAN AND TROPICAL N ATLANTIC W OF 55W...
THE COLD FRONT PRESENTLY OVER THE FAR NW CARIBBEAN WILL CONTINUE 
TO MOVE SE ACROSS THE BASIN TODAY THEN STALL FROM EASTERN CUBA 
TO THE COAST OF NICARAGUA MONDAY MORNING AND GRADUALLY DISSIPATE 
THROUGH WEDNESDAY. NLY WINDS OF 20 TO 25 KT AND BUILDING SEAS TO 
10 FT WILL FOLLOW THE FRONTAL PASSAGE. A LOW LEVEL TROUGH ALONG 
83W MOVING W 10 KT WILL MERGE WITH THE APPROACHING COLD FRONT 
ALONG COASTS OF CENTRAL AMERICA DURING THE NEXT 24 HOURS. A 
TROPICAL WAVE WITH ASSOCIATED WIND SURGE...20-25 KT E WINDS 
BEHIND WAVE AXIS...IS OVER THE CENTRAL CARIBBEAN S OF JAMAICA 
AND WILL INTERACT WITH COLD FRONT ACROSS THE NW CARIBBEAN MON. 
THE WAVE WILL CONTINUE TO MOVE WWD LATE MONDAY INTO TUE REACHING 
THE YUCATAN PENINSULA AND GUATEMALA TUE EVENING. A SECOND 
TROPICAL WAVE ALONG 53W WILL MOVE ACROSS S HALF OF TROPICAL ATLC 
WATERS TODAY AND THEN ACROSS THE WINDWARD ISLANDS EARLY MONDAY 
AND ACROSS THE EASTERN CARIBBEAN MONDAY THROUGH TUE. A BROAD LOW 
LEVEL TROUGH OVER THE CENTRAL ATLC IS PRODUCING NE WINDS OF 20 
KT AHEAD OF IT AND SEAS TO 8 FT. THIS TROUGH WILL APPROACH THE 
NE PORTION OF THE TROPICAL N ATLC LATE TUE. 

SW N ATLC S OF 31N AND W OF 65W...
AT 18/0600 UTC...A COLD FRONT EXTENDS FROM 31N73W TO 23N80W WITH 
STRONG TO NEAR GALE FORCE WINDS BEHIND IT AND BUILDING SEAS TO 
12 FT. THE FRONT WILL MOVE EWD AND EXTEND FROM 31N71W TO CENTRAL 
CUBA THIS EVENING THEN FROM 31N 67W TO E CUBA MONDAY EVENING. 
THE FRONT WILL BECOME DIFFUSE LATE TUE. HIGH PRES WILL BUILD 
BEHIND THE FRONT AND WINDS WILL VEER TO THE N AND THEN NE LATE 
MONDAY WITH SEAS SUBSIDING TO 6 TO 9 FT. PRES GRADIENT BETWEEN 
THE HIGH PRES/RIDGE AND THE REMNANTS OF THE FRONT WILL INDUCE A 
BELT OF E WINDS 20 KT ACROSS THE NW BAHAMAS AND THE STRAITS OF 
FLORIDA TUE INTO WED. 

WARNINGS...

ATLC...
.NONE.

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

$$
FORECASTER GR