WTJP31 RJTD 212100 WARNING 212100. WARNING VALID 222100. STORM WARNING. TROPICAL STORM 1610 LIONROCK (1610) 990 HPA AT 28.8N 133.1E SEA SOUTH OF JAPAN ALMOST STATIONARY. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES NORTH SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 222100UTC AT 28.5N 132.9E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=