000 ABNT20 KNHC 212121 TWOAT TROPICAL WEATHER OUTLOOK NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 530 PM EDT THU SEP 21 2006 FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO... THE NATIONAL HURRICANE CENTER IS ISSUING ADVISORIES ON HURRICANE HELENE...LOCATED ABOUT 485 MILES EAST OF BERMUDA. SHOWER ACTIVITY ASSOCIATED WITH A LARGE TROPICAL WAVE AND A BROAD AREA OF LOW PRESSURE LOCATED 730 MILES WEST-SOUTHWEST OF THE CAPE VERDE ISLANDS HAS CHANGED LITTLE TODAY. HOWEVER...SOME GRADUAL DEVELOPMENT THIS SYSTEM IS POSSIBLE OVER THE NEXT FEW DAYS AS IT MOVES TOWARD THE WEST-NORTHWEST OR NORTHWEST AT AROUND 15 MPH. ELSEWHERE...TROPICAL STORM FORMATION IS NOT EXPECTED THROUGH FRIDAY. $$ FORECASTER MAINELLI/BEVEN