ZCZC MIATCPAT2 ALL TTAA00 KNHC DDHHMM BULLETIN TROPICAL STORM BONNIE ADVISORY NUMBER 6 NATIONAL WEATHER SERVICE MIAMI FL 11 PM AST THU AUG 20 1998 ...BONNIE BRUSHING THE NORTHERN LEEWARD ISLANDS... A TROPICAL STORM WARNING REMAINS IN EFFECT FOR THE U.S. AND BRITISH VIRGIN ISLANDS. A TROPICAL STORM WATCH REMAINS IN EFFECT FOR PUERTO RICO AND THE NORTHERN LEEWARD ISLANDS OF ANTIGUA...BARBUDA... ANGUILLA...ST. MAARTEN...SABA...AND ST. EUSTATIUS. AT 11 PM AST...0300Z...THE CENTER OF TROPICAL STORM BONNIE WAS LOCATED NEAR LATITUDE 19.0 NORTH...LONGITUDE 62.3 WEST OR ABOUT 85 MILES...135 KM...NORTHEAST OF ST MAARTEN IN THE NORTHERN LEEWARD ISLANDS. BONNIE IS MOVING TOWARD THE WEST NORTHWEST NEAR 24 MPH...39 KM/HR ...AND THIS MOTION IS EXPECTED TO CONTINUE ON FRIDAY WITH A GRADUAL DECREASE IN FORWARD SPEED. MAXIMUM SUSTAINED WINDS ARE NEAR 50 MPH... 85 KM/HR...WITH HIGHER GUSTS. SOME STRENGTHENING IS FORECAST DURING THE NEXT 24 HOURS. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 145 MILES ...230 KM FROM THE CENTER. THE LATEST MINIMUM CENTRAL PRESSURE REPORTED BY AN AIR FORCE HURRICANE HUNTER AIRCRAFT WAS 1001 MB...29.56 INCHES. RAINBANDS ASSOCIATED WITH BONNIE ARE SPREADING OVER THE LEEWARD ISLANDS...THE BRITISH AND U.S. VIRGIN ISLANDS...AND PUERTO RICO PRODUCING LOCALLY HEAVY SHOWERS AND STRONG GUSTY WINDS. REPEATING THE 11 PM AST POSITION...19.0 N... 62.3 W. MOVEMENT TOWARD...WEST NORTHWEST NEAR 24 MPH. MAXIMUM SUSTAINED WINDS... 50 MPH. MINIMUM CENTRAL PRESSURE...1001 MB. AN INTERMEDIATE ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT 2 AM AST FOLLOWED BY THE NEXT COMPLETE ADVISORY AT 5 AM AST...FRIDAY. MAYFIELD STRIKE PROBABILITIES ASSOCIATED WITH THIS ADVISORY NUMBER CAN BE FOUND UNDER AFOS HEADER MIASPFAT2 AND WMO HEADER WTNT72 KNHC. NNNN