000 ABNT20 KNHC 060534 TWOAT TROPICAL WEATHER OUTLOOK NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 200 AM EDT TUE OCT 6 2009 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... THE NATIONAL HURRICANE CENTER HAS ISSUED THE LAST ADVISORY ON TROPICAL STORM GRACE...WHICH MERGED WITH A FRONTAL BOUNDARY OVER THE FAR NORTHEASTERN ATLANTIC. SHOWERS AND THUNDERSTORMS ASSOCIATED WITH THE BROAD AREA OF LOW PRESSURE LOCATED ABOUT 800 MILES EAST OF THE LESSER ANTILLES HAVE CHANGED LITTLE IN ORGANIZATION DURING PAST SEVERAL HOURS. THIS SYSTEM STILL HAS THE POTENTIAL TO BECOME A TROPICAL DEPRESSION DURING THE NEXT DAY OR SO BEFORE UPPER-LEVEL WINDS BECOME LESS FAVORABLE FOR DEVELOPMENT. THERE IS A MEDIUM CHANCE... 30 TO 50 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES WEST-NORTHWESTWARD AT ABOUT 15 MPH. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER BROWN/ROBERTS