000 ABNT20 KNHC 202121 TWOAT TROPICAL WEATHER OUTLOOK NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 530 PM EDT MON AUG 20 2007 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... THE NATIONAL HURRICANE CENTER IS ISSUING ADVISORIES ON HURRICANE DEAN...CENTERED ABOUT 270 MILES EAST OF CHETUMAL MEXICO. A LARGE BUT DISORGANIZED AREA OF SHOWERS AND THUNDERSTORMS...LOCATED A FEW HUNDRED MILES NORTHEAST OF THE NORTHERN LEEWARD ISLANDS...IS ASSOCIATED WITH A TROPICAL WAVE. UPPER-LEVEL WINDS ARE EXPECTED TO GRADUALLY BECOME MORE FAVORABLE FOR DEVELOPMENT OF THIS SYSTEM DURING THE NEXT COUPLE OF DAYS AS IT MOVES WESTWARD OR WEST-NORTHWESTWARD AT 15 TO 20 MPH. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER KNABB/ROBERTS