000 AGXX40 KNHC 180643 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 145 AM EST WED NOV 18 2009 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W UPPER LEVELS... STRONG DEEP LAYER CYCLONIC CIRCULATION OVER THE CENTRAL MISSISSIPPI VALLEY WITH MODERATE SOUTHWESTERLIES OVER THE GULF OF MEXICO AND THE FAR NORTHWEST PART OF THE ATLANTIC AREA. LOW WILL MOVE NORTH AND CONTRACT SOME IN SIZE WITH MODERATE SOUTHWESTERLIES CONTINUING OVER THE GULF THROUGH FRIDAY. SHORTWAVE WILL MOVE OFF TEXAS COAST FRIDAY NIGHT. SHORTWAVE WILL MOVE NORTHEAST AND BY SUNDAY BE ABSORBED BY THE WESTERLIES OVER THE SOUTHEAST UNITED STATES. TROUGH OVER THE CENTRAL ATLANTIC FROM 65W TO 60W WILL MOVE SLOWLY EAST PASSING EAST OF 55W THURSDAY. FRIDAY THROUGH SUNDAY BROAD RIDGE OVER THE AREA SOUTH OF ABOUT 22N WITH MODERATE WESTERLIES NORTH OF 22N. SURFACE... STRONG HIGH WELL NORTH OF THE ATLANTIC AREA COUPLED WITH A SURFACE REFLECTION OF THE ATLANTIC TROUGH WILL PRODUCE NORTHEAST WINDS OF 20 KNOTS OR MORE OVER THE NORTHEASTERN PART OF THE ATLANTIC AREA BEGINNING TODAY AND CONTINUING THROUGH THURSDAY. WINDS WILL THEN MOVE EAST OF THE AREA AS THE HIGH MOVES EAST. SHORTWAVE OVER TEXAS WILL INDUCE FRONTAL TROUGH OVER WESTERN GULF OF MEXICO WITH INCREASING SOUTHEASTERLY WINDS THURSDAY NIGHT. WINDS WILL CONTINUE NEAR 20 KNOTS NEAR THE FRONT THROUGH SATURDAY NIGHT. WINDS WILL BE MAINLY DUE TO DEVELOPING LOW PRESSURE NOT A STRONG HIGH BEHIND THE FRONT OR AHEAD OF THE FRONT. BECAUSE OF THIS THERE IS SOME UNCERTAINTY AS TO HOW STRONG THE LOW AND RESULTANT WINDS WILL BE. NORTHEAST WINDS OR 20 KNOTS WILL BE OFF THE COAST OF COLOMBIA THROUGH THE PERIOD. OTHERWISE WINDS WILL BE LESS THAN 20 KT. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. $$ FORECASTER LL