000 ABNT20 KNHC 130538 TWOAT TROPICAL WEATHER OUTLOOK NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 200 AM EDT MON SEP 13 2010 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... THE NATIONAL HURRICANE CENTER IS ISSUING ADVISORIES ON HURRICANE IGOR...LOCATED ABOUT 1000 MILES EAST OF THE NORTHERN LEEWARD ISLANDS...AND ON RECENTLY UPGRADED TROPICAL STORM JULIA...LOCATED ABOUT 60 MILES SOUTH-SOUTHEAST OF THE SOUTHERNMOST CAPE VERDE ISLANDS. CLOUDINESS AND SHOWERS REMAIN DISORGANIZED IN ASSOCIATION WITH A TROUGH OF LOW PRESSURE OVER THE CENTRAL CARIBBEAN SEA. ENVIRONMENTAL CONDITIONS APPEAR FAVORABLE FOR SOME DEVELOPMENT DURING THE NEXT COUPLE OF DAYS AS THE TROUGH MOVES WEST- NORTHWESTWARD AT 10 TO 15 MPH. THERE IS A MEDIUM CHANCE...40 PERCENT...OF THIS SYSTEM BECOMING A TROPICAL CYCLONE DURING THE NEXT 48 HOURS. REGARDLESS OF DEVELOPMENT...LOCALLY HEAVY RAINFALL IS POSSIBLE OVER PORTIONS OF HISPANIOLA... JAMAICA...AND CUBA DURING THE NEXT DAY OR TWO. THESE RAINS COULD CAUSE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES...ESPECIALLY IN MOUNTAINOUS TERRAIN. ELSEWHERE...TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS. PUBLIC ADVISORIES ON JULIA ARE ISSUED UNDER WMO HEADER WTNT32 KNHC AND UNDER AWIPS HEADER MIATCPAT2. FORECAST/ADVISORIES ARE ISSUED UNDER WMO HEADER WTNT22 KNHC AND UNDER AWIPS HEADER MIATCMAT2. $$ FORECASTER CANGIALOSI/PASCH