000 AGXX40 KNHC 112238 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 300 PM EDT THU JUN 11 2009 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... A RIDGE...AT THE SURFACE AND ALOFT...DOMINATES THE ENTIRE AREA WITH MAINLY GENTLE TO MODERATE BREEZE AND SMOOTH SEAS. THE EXCEPTIONS ARE THE NW CORNER OF THE GULF WHERE SLY RETURN FLOW OF 15 TO 20 KT IS BLOWING...AND S OF 22N E OF 94W WHERE NE TO E WINDS OF 15 TO 20 KT ARE ALSO EXPECTED DURING THE EVENINGS. LITTLE CHANGE IS EXPECTED IN THIS PATTERN FOR THE NEXT SEVERAL DAYS. SO...A WEAK RIDGE WILL MEANDER ACROSS THE NORTHERN GULF WATERS THROUGH MON. CARIBBEAN AND TROPICAL N ATLC W OF 55W... A SURFACE TROUGH IS OVER THE CENTRAL CARIBBEAN EXTENDING FROM 15N75W TO 10N76W. A CLUSTER OF MODERATE TO STRONG CONVECTION IS NEAR THE NORTHERN END OF THE TROUGH WHICH IS EXPECTED TO MOVE SLOWLY NW ACROSS THE WESTERN CARIBBEAN FRI REACHING THE SE GULF OF MEXICO LATE SUN. UPPER-LEVEL WINDS...AHEAD OF A DEEP LAYERED TROUGH OVER THE W CARIBBEAN...REMAIN STRONG ENOUGH TO INHIBIT ANY DEVELOPMENT OF THIS SYSTEM INTO A TROPICAL CYCLONE. E TO SE WINDS OF 20 TO 25 KT AND MAX SEAS OF UP TO 9 FT ARE FOUND BEHIND THE TROUGH AXIS TO 65W. AN EARLIER QSCAT PASS CONFIRMED THESE WIND SPEEDS. A TROPICAL WAVE...CURRENTLY ALONG 52W S OF 12N WILL ENTER THE TROPICAL N ATLC LATE THIS AFTERNOON AND MOVE INTO THE E CARIBBEAN LATE FRI THEN MOVE THROUGH THE CENTRAL CARIBBEAN SUN AND MON. SCATTERED MODERATE CONVECTION IS ALONG AND WITHIN AROUND 240 NM E OF AXIS. SUBTROPICAL ATLC W OF 65W... A DEEP LAYERED TROUGH CONTINUES TO DOMINATE THE SW N ATLC AND THE WESTERN CARIBBEAN WHILE ANOTHER UPPER TROUGH DOMINATES MUCH OF THE AREA E OF 55W. A RIDGE LIES BETWEEN THESE TROUGHS. VIS SATELLITE IMAGERY REVEALS A SWIRL OF LOW CLOUDS NEAR 29N72W ASSOCIATED WITH A SURFACE TROUGH THAT LIES ALONG 72W. THIS TROUGH IS EXPECTED TO MOVE OUT OF AREA LATE SAT. AN E TO W RIDGE WILL BUILD WWD ALONG 27N SAT THROUGH MON. WARNINGS ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FORECASTER GR. TROPICAL PREDICTION CENTER.