000
AGXX40 KNHC 210648
MIMATS

MARINE WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
150 AM EST SAT NOV 21 2009

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

UPPER LEVELS...
DEEP LAYER RIDGE EXTENDS FROM THE SOUTHWEST CARIBBEAN ACROSS THE 
GREATER ANTILLES AND THE NORTHERN LESSER ANTILLES TO OVER THE 
SOUTHEAST PART OF THE ATLANTIC AREA. MODERATE SOUTHWESTERLIES 
ARE TO THE NORTH AND NORTHWEST OF THE RIDGE OVER THE GULF OF 
MEXICO AND THE NORTHERN AND NORTHWESTERN PART OF THE ATLANTIC 
AREA. A SHORTWAVE IS OVER THE NORTHWEST GULF OF MEXICO AND WILL 
MOVE ACROSS THE NORTHERN GULF TODAY AND TONIGHT REACHING THE 
SOUTHEAST UNITED STATES SUNDAY TO BE ABSORBED BY THE WESTERLY 
FLOW NORTH OF THE AREA. THE RIDGE WILL CONTRACT SOME WEDNESDAY 
AS A STRONG MIDDLE LATITUDE TROUGH DEVELOPS OVER THE CENTRAL 
UNITED STATES.

SURFACE...
SHORTWAVE OVER TEXAS HAS ASSOCIATED SURFACE LOW OVER THE 
NORTHWEST GULF WITH WINDS OF 20 TO 25 KNOTS NEAR THE LOW. WINDS 
WILL BE CONFINED TO NEAR THE LOW BECAUSE THERE IS NOT MUCH OF A 
HIGH PRESSURE EITHER EAST OR WEST OF THE LOW. WEAK ASSOCIATED 
COLD FRONT WILL BECOME DIFFUSE OVER THE EASTERN GULF SUNDAY AND 
MONDAY. NEXT COLD FRONT ASSOCIATED WITH THE STRONG MIDDLE 
LATITUDE TROUGH WILL MOVE OFF THE TEXAS COAST TUESDAY AND REACH 
FROM NORTH FLORIDA TO BAY OF CAMPECHE MIDDAY WEDNESDAY AND 
CENTRAL FLORIDA TO YUCATAN PENINSULA LATE WEDNESDAY. WINDS WILL 
APPROACH GALE FORCE IN THE SOUTHWEST GULF WITH THIS FRONT. 

TRADES OF 20 KNOTS OR MORE ARE CONFINED TO SOUTH OF 17N EAST OF 
80W THROUGH TUESDAY THEN WILL WEAKEN SOME WEDNESDAY AS THE ABOVE 
MENTIONED FRONTAL TROUGH WEAKENS THE RIDGE NORTH OF THE AREA 
WEDNESDAY.
 
OTHERWISE WINDS WILL BE LESS THAN 20 KT.

WARNINGS...

ATLC...
.NONE.

CARIBBEAN...
.NONE.

GULF OF MEXICO...
.NONE.

$$
FORECASTER LL