ZCZC MIATCPAT2 ALL TTAA00 KNHC DDHHMM BULLETIN TROPICAL STORM BONNIE INTERMEDIATE ADVISORY NUMBER 6A NATIONAL WEATHER SERVICE MIAMI FL 2 AM AST FRI AUG 21 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. LATER THIS MORNING...THE WATCH FOR THE LEEWARD ISLANDS COULD BE DISCONTINUED ...AND A WATCH COULD BE ISSUED FOR THE TURKS AND CAICOS ISLANDS AND THE SOUTHEASTERN BAHAMAS. AT 2 AM AST...0600Z...THE CENTER OF TROPICAL STORM BONNIE WAS LOCATED NEAR LATITUDE 19.3 NORTH...LONGITUDE 63.3 WEST OR ABOUT 90 MILES...140 KM...NORTH-NORTHWEST OF ST MAARTEN IN THE NORTHERN LEEWARD ISLANDS. THIS POSITION IS ABOUT 185 MILES EAST-NORTHEAST OF SAN JUAN PUERTO RICO. BONNIE IS MOVING TOWARD THE WEST NORTHWEST NEAR 23 MPH...37 KM/HR ...AND THIS MOTION IS EXPECTED TO CONTINUE THROUGH FRIDAY NIGHT 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. ESTIMATED MINIMUM CENTRAL PRESSURE IS 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 2 AM AST POSITION...19.3 N... 63.3 W. MOVEMENT TOWARD...WEST NORTHWEST NEAR 23 MPH. MAXIMUM SUSTAINED WINDS... 50 MPH. MINIMUM CENTRAL PRESSURE...1001 MB. THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT 5 AM AST. RAPPAPORT NNNN