000 ABNT20 KNHC 171136 TWOAT TROPICAL WEATHER OUTLOOK NWS NATIONAL HURRICANE CENTER MIAMI FL 800 AM EDT WED AUG 17 2011 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... CLOUDINESS AND SHOWERS ASSOCIATED WITH A TROPICAL WAVE OVER THE CENTRAL CARIBBEAN HAVE CHANGED LITTLE IN ORGANIZATION DURING PAST SEVERAL HOURS. THERE ARE STILL NO SIGNS OF A SURFACE CIRCULATION AND PRESSURES HAVE NOT FALLEN OVER THIS REGION. ENVIRONMENTAL CONDITIONS REMAIN CONDUCIVE FOR SOME GRADUAL DEVELOPMENT OF THIS WAVE DURING THE NEXT COUPLE OF DAYS. THIS SYSTEM HAS A MEDIUM CHANCE...30 PERCENT...OF BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES WESTWARD AT 15 TO 20 MPH. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER KIMBERLAIN