ZCZC MIAWRKAP4 LOC TTAA00 KNHC DDHHMM BULLETIN TROPICAL STORM ANDREW ADVISORY NUMBER 9 NATIONAL WEATHER SERVICE MIAMI FL 11 PM AST TUE AUG 18 1992 ...ANDREW MAINTAINING STRENGTH WHILE MOVING WEST NORTHWESTWARD... AT 11 PM AST...0300Z...THE CENTER OF ANDREW WAS LOCATED NEAR LATITUDE 16.6 NORTH...LONGITUDE 54.4 WEST OR ABOUT 460 MILES ...740 KM...EAST OF THE LESSER ANTILLES. ANDREW IS MOVING TOWARD THE WEST NORTHWEST NEAR 18 MPH...30 KM/HR... THIS DIRECTION OF MOTION IS EXPECTED TO CONTINUE ON WEDNESDAY WITH A GRADUAL DECREASE IN FORWARD SPEED. MAXIMUM SUSTAINED WINDS REMAIN NEAR 50 MPH...85 KM/HR... SOME STRENGTHENING IS POSSIBLE DURING THE NEXT 24 HOURS. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 60 MILES ... 95 KM. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1000 MB...29.53 INCHES. REPEATING THE 11 PM AST POSITION...16.6 N... 54.4 W. MOVEMENT TOWARD ...WEST NORTHWEST NEAR 18 MPH. MAXIMUM SUSTAINED WINDS... 50 MPH. MINIMUM CENTRAL PRESSURE...1000 MB. THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT 5 AM AST...WEDNESDAY. RAPPAPORT