000 AGXX40 KNHC 181829 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 130 PM EST THU DEC 18 2008 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO... CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. RADIOFAX SCHEDULE FOR GRAPHICAL WIND WAVE...SURFACE FORECAST AND PEAK WAVE PERIOD CHARTS HAS CHANGED. FOR THE ATLANTIC BASIN THIS INCLUDES 24...36...48 AND 72 HOUR WIND WAVE..24...48..72 HOUR SURFACE FORECAST AND 48 AND 72 HOUR PEAK WAVE PERIOD CHARTS. FOR ADDITIONAL INFORMATION PLEASE REFER TO THE FAX SCHEDULE ON THE NHC WEB SITE AT HTTP://WWW.NHC.NOAA.GOV/RADIOFAX.SHTML UPPER LEVELS... TROUGH OVER THE NORTHERN PART OF THE TROPICAL NORTH ATLANTIC REGION AND THE EASTERN CARIBBEAN WILL MOVE SOUTH AND WEAKEN AND DISSIPATE SUNDAY OVER NORTHERN SOUTH AMERICA. LARGE HIGH PRESSURE CENTERED OVER THE GULF OF MEXICO COVERS THE REMAINDER OF THE AREA. HIGH WILL MOVE SLOWLY EAST AND BE CENTERED EAST OF THE BAHAMAS TUESDAY AND WEDNESDAY. WESTERLIES WILL EXTEND SOUTH OVER THE NORTHERN PART OF THE GULF OF MEXICO BEGINNING SATURDAY AND ON SUNDAY ACROSS THE ENTIRE AREA NORTH OF 27N IN THE GULF OF MEXICO AND 29N IN THE ATLANTIC. BY MONDAY THE WESTERLIES WILL BE NORTH OF 25N THEN MOVE BACK NORTH OF 30N BY LATE WEDNESDAY. SURFACE... SURFACE TROUGH IS LOCATED TO THE NORTHWEST OF THE UPPER TROUGH AND WILL WEAKEN AND BECOME DIFFUSE SATURDAY. RIDGE ALONG 30N WEST OF THE TROUGH WILL MOVE TO 26N AND EXTEND ACROSS THE ENTIRE AREA BY LATE SATURDAY. COLD FRONT WILL MOVE OFF TEXAS COAST SATURDAY NIGHT AND MOVE ACROSS THE GULF REACHING THE STRAITS OF FLORIDA AND YUCATAN CHANNEL EARLY MONDAY. SOUTHERLY WINDS AHEAD OF THE FRONT WILL INCREASE SATURDAY NIGHT IN THE NORTHWEST PART OF THE ATLANTIC AND ACROSS THE ATLANTIC N OF 28N BY SUNDAY NIGHT. COLD FRONT WILL MOVE OFF GEORGIA COAST SUNDAY AND BY LATE MONDAY EXTEND THROUGH 30N65W TO EASTERN CUBA. HIGH PRESSURE NORTH OF THE FRONT WILL BRIDGE ACROSS THE FRONT TUESDAY. HIGH WILL CONTINUE TO MOVE EAST AND NEXT COLD FRONT WILL MOVE OFF TEXAS COAST WEDNESDAY. NORTHERLY WINDS WEEST OF FRONT WILL INCREASE LATE WEDNESDAY. ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER LL. TROPICAL PREDICTION CENTER.