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ZCZC MIATWOAT ALL TTAA00 KNHC DDHHMM TROPICAL WEATHER OUTLOOK NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 800 PM EDT TUE SEP 21 2010 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... THE NATIONAL HURRICANE CENTER IS ISSUING ADVISORIES ON TROPICAL STORM LISA...LOCATED ABOUT 525 MILES WEST-NORTHWEST OF THE CAPE VERDE ISLANDS...AND HAS ISSUED THE LAST ADVISORY ON HURRICANE IGOR...THAT HAS LOST ITS TROPICAL CHARACTERISTICS ABOUT 125 MILES NORTH-NORTHEAST OF ST. JOHNS NEWFOUNDLAND. 1. A TROPICAL WAVE OVER THE EASTERN CARIBBEAN SEA IS PRODUCING A LARGE AREA OF DISORGANIZED SHOWERS AND THUNDERSTORMS. ENVIRONMENTAL CONDITIONS ARE EXPECTED TO BECOME MORE FAVORABLE FOR A TROPICAL DEPRESSION TO FORM DURING THE NEXT COUPLE OF DAYS AS THE SYSTEM MOVES WESTWARD NEAR 15 MPH. THERE IS A MEDIUM CHANCE...50 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. LOCALLY HEAVY RAINFALL AND GUSTY WINDS ARE LIKELY OVER THE WINDWARD ISLANDS...THE NETHERLANDS ANTILLES...AND THE NORTHERN COASTS OF VENEZUELA AND COLOMBIA DURING THE NEXT DAY OR TWO. THESE RAINS COULD CAUSE LIFE-THREATENING FLASH FLOODS. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. $$ FORECASTER CANGIALOSI/PASCH NNNN
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