000 AGXX40 KNHC 251803 RRA MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 1230 PM EDT MON JUL 25 2011 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND TROPICAL N ATLC...AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... 1018 MB SURFACE HIGH PRES IS CENTERED OVER THE NE GULF OF MEXICO NEAR 28N85W. LIGHT TO MODERATE WINDS AND SEAS OF 1 TO 3 FT DOMINATE THE ENTIRE GULF CURRENTLY. THE NORTHERN EXTENT OF A TROPICAL WAVE MOVING THROUGH THE SOUTHERN BAHAMAS...EASTERN CUBA AND JAMAICA WILL PUSH INTO THE SE AND S CENTRAL GULF TUE AND WED. WINDS WILL VEER MORE SE AND INCREASE SLIGHTLY AS THE WAVE MIGRATES INTO THE CENTRAL GULF AND DAMPENS OUT. HIGH PRES WILL BUILD OVER THE WESTERN ATLC IN THE WAKE OF THE TROPICAL WAVE THU INTO FRI. THIS WILL ALLOW THE PRES GRADIENT TO TIGHTEN...RESULTING IN EASTERLY WINDS TO 20 KT OVER THE SE GULF AND STRAITS OF FLORIDA BY FRI. CARIBBEAN AND TROPICAL N ATLC W OF 55W... A TROPICAL WAVE IS NOTED ALONG 77W EXTENDING FROM THE SOUTHERN BAHAMAS THROUGH EASTERN CUBA TO JAMAICA AND AS FAR S AS 15N. THE WAVE REMAINS WELL AMPLIFIED...AND SHOWS UP WELL IN ASCAT WIND DATA...AS WELL AS IN SATELLITE DERIVED HIGH DENSITY WINDS. A CLUSTER OF THUNDERSTORMS IS ACTIVE ALONG THE WAVE AXIS BETWEEN JAMAICA AND EASTERN CUBA. ASCAT AND WINDSAT DATA SHOW THAT WINDS ARE STILL 20 TO 25 KT IN THE S CENTRAL CARIBBEAN...AS HIGH PRES BUILDS IN THE WAKE OF THE TROPICAL WAVE. BUOYS NEAR 15N75W SHOW SIGNIFICANT WAVE HEIGHTS TO 9 FT IN THE PERSISTENT FRESH TO STRONG EASTERLY FLOW. WINDS AND SEAS WILL DIMINISH SLIGHTLY STARTING TONIGHT AS THE WAVE MOVES FURTHER WEST. A LESS AMPLIFIED TROPICAL WAVE CURRENTLY WELL TO THE EAST NEAR 42W WILL MOVE WEST OF 55W WED APPROACHING THE LESSER ANTILLES. THIS WAVE DEAMPLIFY AS IT SHIFTS INTO THE EASTERN CARIBBEAN THU AND CENTRAL CARIBBEAN FRI AND SAT. SW N ATLC... THE NORTHERN EXTENT OF A TROPICAL WAVE ALONG 77W IS MOVING THROUGH EASTERN CUBA TOWARD THE CAY SAL BANK...S OF 24N. A SURFACE RIDGE REMAINS ANCHORED ALONG 29N. 15 TO 20 KT WINDS PERSIST S OF 24N THROUGH THE TURKS AND CAICOS AND SOUTHERN BAHAMAS AS WELL AS THE APPROACHES TO THE WINDWARD PASSAGE BEHIND THE TROPICAL WAVE AXIS. THE TROPICAL WAVE WILL SHIFT WNW INTO THROUGH THE STRAITS OF FLORIDA TUE AND INTO THE SE GULF BY WED. THE RIDGE WILL REMAIN IN PLACE AND BUILD SLIGHTLY THROUGH THE LATTER HALF OF THE WEEK...MAINTAINING MODERATE TO FRESH E TO SE WINDS S OF 24N W OF 65W. WARNINGS... GULF OF MEXICO... .NONE. SW N ATLC... .NONE. CARIBBEAN AND TROPICAL N ATLC... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER CHRISTENSEN