WTJP21 RJTD 300600 WARNING 300600. WARNING VALID 310600. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 1610 LIONROCK (1610) 965 HPA AT 37.7N 142.0E SEA EAST OF JAPAN MOVING NORTHNORTHWEST 21 KNOTS. POSITION FAIR. MAX WINDS 65 KNOTS. RADIUS OF OVER 50 KNOT WINDS 120 MILES NORTHEAST SEMICIRCLE AND 60 MILES ELSEWHERE. RADIUS OF OVER 30 KNOT WINDS 325 MILES SOUTH SEMICIRCLE AND 240 MILES ELSEWHERE. FORECAST POSITION FOR 301800UTC AT 43.5N 135.5E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 974 HPA, MAX WINDS 55 KNOTS. BECOMING EXTRATROPICAL LOW. FORECAST POSITION FOR 310600UTC AT 43.8N 126.6E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 40 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=