WTJP31 RJTD 201500 WARNING 201500. WARNING VALID 211500. STORM WARNING. SEVERE TROPICAL STORM 1512 HALOLA (1512) 990 HPA AT 21.6N 145.8E OGASAWARA SHOTO MOVING WEST 09 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 150 MILES. FORECAST POSITION FOR 210300UTC AT 22.0N 143.5E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 211500UTC AT 22.7N 141.0E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=