WTJP21 RJTD 231200 WARNING 231200. WARNING VALID 241200. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. SEVERE TROPICAL STORM 1610 LIONROCK (1610) 975 HPA AT 26.9N 134.0E SEA SOUTH OF JAPAN MOVING SOUTHSOUTHWEST SLOWLY. POSITION FAIR. MAX WINDS 60 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 30 MILES. RADIUS OF OVER 30 KNOT WINDS 120 MILES. FORECAST POSITION FOR 241200UTC AT 26.0N 133.4E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 960 HPA, MAX WINDS 75 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 251200UTC AT 25.4N 133.0E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 945 HPA, MAX WINDS 85 KNOTS NEAR CENTER. FORECAST POSITION FOR 261200UTC AT 25.1N 132.7E WITH 170 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 940 HPA, MAX WINDS 90 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=