WTJP21 RJTD 221200 WARNING 221200. WARNING VALID 231200. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. TROPICAL STORM 1610 LIONROCK (1610) 990 HPA AT 28.6N 134.0E SEA SOUTH OF JAPAN ALMOST STATIONARY. POSITION FAIR. MAX WINDS 45 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES. FORECAST POSITION FOR 231200UTC AT 27.8N 133.8E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 241200UTC AT 27.1N 133.4E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 251200UTC AT 26.4N 132.7E WITH 170 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 960 HPA, MAX WINDS 75 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=