000 ABNT20 KNHC 281503 TWOAT TROPICAL WEATHER OUTLOOK NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1130 AM EDT THU SEP 28 2006 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... THE NATIONAL HURRICANE CENTER IS ISSUING ADVISORIES ON RECENTLY-UPGRADED TROPICAL STORM ISAAC... LOCATED ABOUT 665 MILES EAST-SOUTHEAST OF BERMUDA. A TROPICAL WAVE ACCOMPANIED BY A SMALL LOW PRESSURE SYSTEM IS CENTERED ABOUT 70 MILES EAST-NORTHEAST OF BARBUDA IN THE NORTHERN LEEWARD ISLANDS. CONVECTION HAS BECOME A LITTLE MORE CONCENTRATED THIS MORNING AND SOME SLOW DEVELOPMENT IS POSSIBLE OVER THE NEXT DAY OR TWO AS THE SYSTEM MOVES WEST-NORTHWESTWARD AT ABOUT 10 MPH. REGARDLESS OF DEVELOPMENT... SHOWERS AND THUNDERSTORMS SHOULD OVERSPREAD THE NORTHERN LEEWARD ISLANDS TODAY AND TONIGHT... PRODUCING BRIEF PERIODS OF HEAVY RAIN AND GUSTY WINDS. ELSEWHERE...TROPICAL STORM FORMATION IS NOT EXPECTED THROUGH FRIDAY. $$ FORECASTER BLAKE/STEWART