000
AGXX40 KNHC 180638
MIMATS

MARINE WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
245 AM EDT FRI SEP 18 2009

GULF OF MEXICO...A DEEP LAYERED CYCLONE OVER NORTHERN LA APPEARS 
TO BE FILLING...BUT A SERIES OF LOW LEVEL TROUGHS OR WEAK COLD 
FRONTS WILL CONTINUE ROTATE THROUGH THE PATTERN OVER THE NW 
GULF. CURRENTLY A WEAK COLD IS STALLING AND LOSING IDENTITY FROM 
THE MS DELTA TO NEAR 25N93W. EXPECT A BROAD WEAK TROUGH TO 
CONTINUE OVER THE NW GULF THROUGH SUN AND DISSIPATE SUN NIGHT. A 
BROAD TROUGH WILL DEVELOP OVER THE S CENTRAL GULF LATE IN THE 
WEEKEND AND CONTINUE INTO MON. EXPECT WINDS 10-15 KT NEAR THE 
SOUTHERN TROUGH...OTHERWISE 5 TO 10 KT ACROSS AREA THROUGH 
PERIOD.    

SW N ATLC...
A QUASI-STATIONARY TROUGH EXTENDS ALONG FROM 31N72W TO 26N75W 
ACCOMPANIED BY A 15 KT NE-SE WIND SHIFT. A SECOND TROUGH...THE 
REMNANTS OF TC FRED...IS ANALYZED S OF 27N ALONG 63W AND IS 
MOVING WNW ACCOMPANIED BY A 5-10 KT NE-SE WIND SHIFT. THE 
TROUGHS WILL SORT OF MERGE INTO A BROAD INVERTED TROUGH ALONG 
74W LATE THIS WEEKEND THAT SHOULD MOVE NW REACHING THE SE FL 
COAST LATE MON. HIGH PRES BUILDS ACROSS THE AREA FROM THE E WITH 
E-SE WINDS 10-15 KT ACROSS THE AREA BY LATE IN THE PERIOD.     

CARIBBEAN AND TROPICAL N ATLC...
SSMI AND QSCAT DATA INDICATE AN AREA OF ELY 15-20 KT TRADES OVER 
THE CENTRAL CARIBBEAN AND E-SE 15 KT WINDS OVER THE GULF OF 
HONDURAS. ELY TRADES AT 10 KT ARE EXPECTED TO INCREASE SLIGHTLY 
TO 15 KT TONIGHT THROUGH MON THEN RELAX TO MOSTLY 10 KT TUE. NLY 
SWELL IS PROPAGATING S THROUGH THE NE ATLC PASSAGES AND IS ALSO 
MIXING WITH BOTH NE AND SE SWELL E OF THE LESSER ANTILLES. A 
TROPICAL LOW PRES WELL E OF THE AREA NEAR 14N37W IS EXPECTED TO 
WEAKEN TO A TROUGH AND REMAIN E OF THE AREA THROUGH THE PERIOD. 
A MID TO UPPER CYCLONE NEAR 21N56W IS ENHANCING CONVECTION E OF 
55W BUT NOT EXPECTED TO AFFECT THE SURFACE WINDS.     

ATLC...
.NONE.

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE

$$
FORECASTER NELSON