000 AGXX40 KNHC 271612 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1210 PM EDT SUN JUL 27 2008 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... A SURFACE RIDGE OF HIGH PRES EXTENDS FROM THE WESTERN ATLC THROUGH THE EASTERN GULF...TO A 1016 MB HIGH PRES CELL CENTERED OVER THE WESTERN GULF. BUOYS...SHIPS...AND SCATTEROMETER DATA SHOW GENERALLY LIGHT TO MODERATE FLOW ACROSS GULF WATERS AS A RESULT. LITTLE CHANGE IS EXPECTED THROUGH MONDAY AS A BROAD UPPER TROUGH OVER THE EASTERN U.S. LIFTS OUT...ALLOWING THE RIDGE TO BUILD ALONG ROUGHLY 26N ACROSS THE GULF. FOR TUE THROUGH THE REMAINDER OF THE WEEK...A TROUGH DEVELOPS OVER THE SOUTHERN PLAINS...AS A PAIR OF TROPICAL WAVES MIGRATING THROUGH CENTRAL AMERICA. THIS WILL ALLOW WINDS TO INCREASE SLIGHTLY OVER THE WESTERN GULF ON THE WESTERN PERIPHERY OF THE SURFACE RIDGE. HOWEVER...A BROAD MID/UPPER TROUGH DIGGING THROUGH THE EASTERN U.S AND WESTERN ATLC THU AND FRI WILL WEAKEN THE SURFACE HIGH PRES SOMEWHAT...ALLOWING ONLY MODEST INCREASES IN RETURN FLOW OVER THE WESTERN GULF. CARIBBEAN... HIGH PRES NORTH OF THE AREA IS INTERACTING WITH A TROPICAL WAVE ALONG 79W MIGRATING INTO THE WESTERN CARIBBEAN...TO MAINTAIN STRONG TRADES MAINLY NEAR THE COLOMBIAN COAST AT LEAST INTO TUE. A SECOND TROPICAL WAVE CURRENTLY EAST OF THE ANTILLES WILL PUSH INTO THE EASTERN CARIBBEAN TOMORROW. WHILE THIS WILL BRING A SLIGHT INCREASE IN MOISTURE...THIS TROPICAL WAVE IS IN THE PROCESS OF SPLITTING WITH MOST OF THE ENERGY REMAINING TO THE NORTHEAST OF THE CARIBBEAN. LOOKING AHEAD...A THIRD TROPICAL WAVE FURTHER EAST INTO THE ATLC WILL ENTER THE EASTERN CARIBBEAN BY WED. WHILE THIS WILL ALLOW AT LEAST FRESH TRADES OVER THE CARIBBEAN FOR THE LATTER HALF OF THE WEEK...THE RIDGE TO THE NORTH WILL LIKELY WEAKEN AS A BROAD MID/UPPER TROUGH PUSHES THROUGH THE EASTERN U.S. AND INTO THE WESTERN ATLC. ATLC WATERS S OF 31N W OF 55W... A SURFACE RIDGE EXTENDS FROM BERMUDA THROUGH THE NORTHERN BAHAMAS...WITH GENERALLY LIGHT TO MODERATE FLOW NOTED ACROSS THE AREA NORTH OF 20N. BUOYS AND SCATTEROMETER DATA SHOW ONLY MODERATE TRADES IN THE WATERS E OF THE ANTILLES AND N OF GUYANA AS WELL. NORTHERN PORTION OF A TROPICAL WAVE CURRENTLY ALONG 50W WILL BREAK OFF AND MIGRATE TO THE NORTHWEST AS A WEAK TROUGH...REACHING ROUGHLY 28N58W BY LATE MON. MOST OF THE INCREASED WINDS/SEAS ASSOCIATED WITH THIS TROUGH WILL REMAIN EAST OF 55W. A SECOND TROPICAL WAVE FURTHER EAST WILL APPROACH THE WATERS S OF 20N BY LATE TUE...BRINGING INCREASED TRADES THROUGH THE LEEWARD ISLANDS BY MIDWEEK. TRADES WILL PICK UP BETWEEN THE VIRGIN ISLANDS AND THE TURKS/CAICOS STARTING WED AS THE TROPICAL WAVE ENTERS THE EASTERN CARIBBEAN SOUTH OF THE RIDGE AXIS. EXPECT MODERATE TO FRESH SW WINDS WILL INCREASE OFF THE N FLORIDA COAST BY THU...BETWEEN THE SURFACE RIDGE AND TROUGHING OVER THE SOUTHEAST U.S. WARNINGS... ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. .FORECASTER CHRISTENSEN. TROPICAL PREDICTION CENTER.