000 AGXX40 KNHC 210721 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 320 AM EDT SUN AUG 21 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... A WEAK SURFACE RIDGE WILL MEANDER ACROSS THE NORTHERN WATERS THROUGH THE PERIOD WITH INTERMITTENT HIGH PRES CENTERS ALONG THE RIDGE AXIS. A WEAK COLD WILL STALL OVER THE N AND NE COASTAL PLAINS TUE NIGHT AND WED. AN INVERTED TROUGH EXTENDING N FROM THE REMNANTS OF TROPICAL STORM HARVEY WILL MOVE SLOWLY W ACROSS THE BAY OF CAMPECHE FROM THROUGH TONIGHT. N ATLC S OF 31N W OF 55W...CARIBBEAN SEA AND TROPICAL N ATLC S OF 22N W OF 55W... TROPICAL STORM IRENE HAS DEVELOPED IN THE ATLC JUST E OF THE LEEWARD ISLANDS. STRONG BANDS OF CONVECTION ARE NOTED MAINLY ON THE SOUTHERN PERIPHERY OF THE STORM...AS IT BECOMES A LITTLE BETTER ORGANIZED. WITH HIGH PRES N OF THE AREA...THERE IS A BROAD AREA WELL TO THE NORTH OF THE CENTER. PER THE CURRENT NHC FORECAST...IRENE WILL MOVE THROUGH THE LEEWARDS TODAY...TO THE SOUTH OF PUERTO RICO TONIGHT...THEN INTENSIFYING TO HURRICANE STRENGTH AS IT MOVES TOWARD THE SOUTHERN COAST OF HISPANIOLA MON. IRENE THEN MOVES ACROSS HAITI AND THE WINDWARD PASSAGE INTO EASTERN CUBA AS A TROPICAL STORM TUE INTO WED...THEN TOWARD THE STRAITS OF FLORIDA THU. MARINERS SHOULD MONITOR AS THIS SYSTEM WILL IMPACT THE SW ATLC S OF 25N...AND THE NE AND CENTRAL CARIBBEAN TO THE N OF 14N...AS WELL AS MOST OF THE TROPICAL ATLC ZONE. IN THE WESTERN CARIBBEAN...E WINDS TO DIMINISH BELOW 20 KT W GULF OF HONDURAS THIS MORNING AS T.S. HARVEY MOVES FURTHER INLAND AND WEAKENS. A RIDGE WILL REMAIN IN PLACE FROM BERMUDA TO CENTRAL FLORIDA THROUGH THE MIDDLE OF NEXT WEEK. WARNINGS... GULF OF MEXICO... .NONE. CARIBBEAN AND TROPICAL N ATLC... .AMZ082...TROPICAL STORM CONDITIONS EXPECTED N OF 17N E OF 80W TUE NIGHT THROUGH WED. .AMZ086...TROPICAL STORM WARNING N OF 15N E OF 70W. HURRICANE CONDITIONS EXPECTED N OF 16N BETWEEN 65W AND 71W MON MORNING THROUGH TUE. .AMZ087...TROPICAL STORM WARNING FROM 15N TO 18N W OF 57W. SW N ATLC... .AMZ080...TROPICAL STORM CONDITIONS EXPECTED S OF 26N W OF 72W TUE THROUGH THU. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER CHRISTENSEN