WTJP23 RJTD 050000 WARNING 050000. WARNING VALID 060000. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. TROPICAL STORM 1511 NANGKA (1511) 992 HPA AT 11.4N 164.7E MARSHALLS MOVING WEST 12 KNOTS. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES. FORECAST POSITION FOR 051200UTC AT 11.7N 161.8E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 060000UTC AT 12.1N 159.5E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 070000UTC AT 13.5N 155.5E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 965 HPA, MAX WINDS 70 KNOTS NEAR CENTER. FORECAST POSITION FOR 080000UTC AT 15.9N 151.9E WITH 210 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 950 HPA, MAX WINDS 85 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=