000 AGXX40 KNHC 131800 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 100 PM EST THU NOV 13 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... A STRONG SHORTWAVE TROUGH OVER SOUTH TEXAS AND NORTHEAST MEXICO WILL MOVE EAST-NORTHEAST AND BE ABSORBED BY A LARGER TROUGH AS IT MOVES OVER THE NORTHWEST PART OF THE ATLANTIC AREA SATURDAY. THE SHORTWAVE TROUGH IS ENHANCING CONVECTION ACTIVITY FOCUSED ON A STATIONARY SURFACE TROUGH IN THE WEST GULF. AS THE STRONG SHORTWAVE MOVES EASTWARD THIS EFFECT WILL DIMINISH FRIDAY. A MAJOR TROUGH WILL PASS ACROSS THE SOUTHEAST UNITED STATES FRIDAY NIGHT THROUGH SATURDAY NIGHT AND MOVE OVER THE ATLANTIC SUNDAY. THE SYSTEM WILL LEAVE BEHIND MODERATE WESTERLIES NORTH OF 25N SUNDAY THROUGH TUESDAY. ELSEWHERE BROAD RIDGE WILL PREVAIL. SURFACE... STRONG HIGH CENTERED NORTH OF THE ATLANTIC AREA WITH RIDGE OVER THE AREA NORTH OF 22N. HIGH AND RIDGE WILL MOVE LITTLE THROUGH FRIDAY THEN MOVE EAST SLOWLY AHEAD OF A COLD FRONT. BY MONDAY THE RIDGE WILL WEAKEN OVER THE EASTERN PART OF THE ATLANTIC AREA. STRONG COLD FRONT ASSOCIATED WITH THE MAJOR TROUGH WILL MOVE OFF THE TEXAS COAST FRIDAY NIGHT. NORTHERLY WINDS OF 25 TO 30 KT WITH SOME GUSTS TO GALE FORCE OVER THE NORTHWEST GULF OF MEXICO. THE COLD FRONT WILL MOVE OFF THE SOUTHEAST UNITED STATES COAST OVER THE ATLANTIC SATURDAY. WINDS BEHIND THE FRONT IN THE ATLANTIC WILL BE LESS THAN IN THE GULF BECAUSE THE HIGH REMAINS OVER THE WEST GULF COAST...SO ONLY 20 TO 25 KNOT WINDS WILL FOLLOW THE FRONT IN THE ATLANTIC. BECAUSE OF THE HIGH IN THE ATLANTIC AREA SOUTHERLY WINDS AHEAD OF THE FRONT WILL BE STRONGER THAN IN THE GULF WITH 20 TO 30 KNOTS MOSTLY CONFINED TO NORTH OF 27N. BY MIDDAY SUNDAY THE FRONT WILL EXTEND THROUGH 31N70W TO ACROSS CENTRAL CUBA THEN TO HONDURAS. BY MIDDAY MONDAY THE FRONT WILL WEAKEN ALONG A LINE 31N63W TO ACROSS EAST CUBA TO NICARAGUA. THE HIGH BEHIND THE COLD FRONT WILL SETTLE OVER EAST TEXAS SUNDAY THEN WEAKEN MONDAY BUT BE REINFORCED TUESDAY. TRADES IN THE TROPICAL ATLANTIC WILL BE NEAR TO ABOVE NORMAL UNTIL THE HIGH NORTH OF THE AREA WEAKENS SUNDAY AND MONDAY. TRADES IN THE CARIBBEAN WILL BE LESS THAN NORMAL THROUGH THE PERIOD. BEHIND THE COLD FRONT THAT WILL AFFECT THE NORTHWEST CARIBBEAN BEGINNING SATURDAY NIGHT NORTHERLY WINDS OF 20 TO 25 KT ARE FORECAST. THE NORTHERLY WINDS BEHIND THE FRONT WILL CONTINUE THROUGH MONDAY AND BY TUESDAY ALSO AFFECT THE WESTERN PART OF THE SOUTHWEST CARIBBEAN. ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER LL. TROPICAL PREDICTION CENTER.