WTJP31 RJTD 202100 WARNING 202100. WARNING VALID 212100. STORM WARNING. SEVERE TROPICAL STORM 1512 HALOLA (1512) 985 HPA AT 21.9N 144.8E OGASAWARA SHOTO MOVING WEST 09 KNOTS. POSITION FAIR. MAX WINDS 55 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 50 MILES. RADIUS OF OVER 30 KNOT WINDS 150 MILES. FORECAST POSITION FOR 210900UTC AT 22.4N 142.5E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 212100UTC AT 23.0N 140.2E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 60 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=