WTJP33 RJTD 050300 WARNING 050300. WARNING VALID 060300. STORM WARNING. TROPICAL STORM 1511 NANGKA (1511) 992 HPA AT 11.3N 164.5E MARSHALLS MOVING WEST 10 KNOTS. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES. FORECAST POSITION FOR 051500UTC AT 11.7N 161.6E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 060300UTC AT 12.1N 159.2E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=