000
AGXX40 KNHC 161810
MIMATS

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
210 PM EDT FRI SEP 16 2011

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

GULF OF MEXICO...
WEAK COLD FRONT IN THE NORTHERN GULF ALREADY STARTING TO BECOME 
MORE DIFFUSE...AND IS EXPECTED TO DISSIPATE BY SAT AFTERNOON. 
HIGH PRES WILL BUILD ACROSS THE REGION SAT NIGHT AND SUN AS THE 
FRONTAL TROUGH FADES AWAY. TIGHTENING PRES GRADIENT IN NE GULF 
WILL INCREASE WINDS TO 15-20 KT MON AND TUE...WITH SEAS TO 4 FT.

CARIBBEAN SEA AND TROPICAL N ATLC W OF 55W...
UPPER LEVEL LOW NE OF THE VIRGIN ISLANDS AND PUERTO RICO ACTING 
TO ENHANCE CLOUDS AND SHOWERS ASSOCIATED WITH A TROUGH ALONG 57W 
IN THE TROPICAL N ATLC. THE LOW AND TROUGH ARE MOVING IN TANDEM 
THIS AFTERNOON...BUT MODEL GUIDANCE INDICATES THE THE UPPER LOW 
WILL START TO LIFT OUT NE BY SAT NIGHT WHILE THE SURFACE TROUGH 
CONTINUES TO MOVE SLOWLY WNW. LOSS OF UPPER LEVEL SUPPORT WILL 
TEND TO WEAKEN CONVECTIVE ACTIVITY NEAR THE TROUGH...SO EXPECT 
SHOWERS AND TSTMS PRIMARILY IN THE E CARIBBEAN THROUGH SUN-MON. 
HIGH PRES RIDGE OVER CENTRAL ATLC WILL EXTEND SW THROUGH MON... 
ALLOWING TRADES TO INCREASE OVER MUCH OF TROPICAL N ATLC AND 
EASTERN CARIBBEAN.

SOUTHWEST N ATLC S OF 31N W OF 55W...
WEAK COLD FRONT EXPECTED TO MOVE OFF NE FLORIDA THIS EVENING 
WILL STALL THEN DISSIPATE THROUGH SAT NIGHT WITH RIDGE BUILDING 
IN ITS WAKE. NE WINDS WILL INCREASE TO 15-20 KT IN NW PORTION 
SUN-MON WITH SEAS BUILDING TO 7 FT. TROUGH FROM 31N70W TO 22N74W 
WILL DRIFT SLOWLY W TOWARD WESTERN CUBA AND THE FLORIDA COAST 
THROUGH MON. 

WARNINGS...

GULF OF MEXICO...
.NONE.

CARIBBEAN SEA AND TROPICAL N ATLC...
.NONE.

SW N ATLC...
.NONE.
          
FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORECASTER MUNDELL