WTJP31 RJTD 300300 WARNING 300300. WARNING VALID 310300. STORM WARNING. SEVERE TROPICAL STORM 2401 EWINIAR (2401) 992 HPA AT 28.4N 135.2E SEA SOUTH OF JAPAN MOVING NORTHNORTHEAST 12 KNOTS. POSITION GOOD. MAX WINDS 50 KNOTS. RADIUS OF OVER 30 KNOT WINDS 180 MILES SOUTHEAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 301500UTC AT 30.9N 137.5E WITH 45 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 992 HPA, MAX WINDS 50 KNOTS. FORECAST POSITION FOR 310300UTC AT 34.2N 141.5E WITH 65 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 992 HPA, MAX WINDS 45 KNOTS. JAPAN METEOROLOGICAL AGENCY.=