000 AGXX40 KNHC 211808 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 110 PM EST SUN JAN 21 2007 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. UPPER LEVELS... LARGE ANTICYCLONE CENTERED OVER THE ANTILLES THROUGH WEDNESDAY WILL WEAKEN SOME THURSDAY AND FRIDAY. WESTERLIES WILL BE CONFINED TO NORTH OF 25N THROUGH WEDNESDAY THEN SHIFT SOUTH TO NORTH OF 20N THURSDAY AND FRIDAY. SHORTWAVES PAST EAST TO WEST NORTH OF THE AREA THROUGH FRIDAY WITH NONE EXTENDING SIGNIFICANTLY INTO THE FORECAST AREA. SURFACE... HIGH CENTERED OVER THE ATLANTIC AREA WILL CAUSE SOUTHERLY FLOW OF UP TO 20 KT EAST OF A WEAK COLD FRONT OVER THE NORTHWEST GULF OF MEXICO. BY LATE MONDAY THE FRONT WILL EXTEND FROM THE NORTHWEST PART OF THE ATLANTIC AREA ACROSS NORTH FLORIDA TO NEAR THE TEXAS MEXICAN BORDER. HIGH BUILD OVER TEXAS TUESDAY WITH STRONG NORTHERLY WINDS OVER THE WEST GULF. BY LATE TUESDAY FRONT WILL EXTEND FROM 30N65W TO SOUTH FLORIDA TO NEAR 25N95W THEN SOUTH TO THE BAY OF CAMPECHE WITH CONTINUING STRONG NORTHERLY WINDS IN THE WEST GULF. WINDS IN THE ATLANTIC WILL BE CONFINED TO NORTH OF 26N AND BE MOSTLY WESTERLY BOTH WEST AND EAST OF THE FRONT. ON WEDNESDAY WEAK HIGH WILL SETTLE OVER THE ATLANTIC AREA WITH THE FRONT WEAKENING SOUTH OF 25N. IN THE GULF HIGH PRESSURE OVER TEXAS WILL BE REINFORCED WITH STRONG NORTHERLY WINDS OVER THE WEST GULF. WINDS WILL REACH GALE FORCE IN THE WEST GULF THURSDAY. IN THE ATLANTIC DEVELOPING LOW PRESSURE OVER THE NORTHWEST PART OF THE ATLANTIC AREA WILL INCREASE THE SOUTHERLY WINDS WITH GALE SOUTHWESTERLY FLOW DEVELOPING THURSDAY EAST OF A NEW COLD FRONT. WINDS OF 20 KNOTS OR MORE WILL BE CONFINED TO NORTH OF 25N. WINDS IN THE GULF WILL BECOME LIGHTER FRIDAY AS THE HIGH PRESSURE WEAKENS AND MOVES OVER THE SOUTHEAST U.S. THE STRONG WINDS IN THE ATLANTIC WILL MOVE EAST OF 65W BY LATE FRIDAY. WINDS IN THE TROPICAL ATLANTIC AND CARIBBEAN WILL BE LITTLE AFFECTED BY THE SYSTEMS NORTH OF 25N. ONLY ON FRIDAY WILL THE WINDS IN THE SOUTH CENTRAL PART OF THE CARIBBEAN WEAKEN SOME. TRADES IN THE TROPICAL ATLANTIC WILL BE LESS THAN NORMAL THROUGH THE PERIOD. WARNINGS... ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER LL