WTJP31 RJTD 190300 WARNING 190300. WARNING VALID 200300. STORM WARNING. SEVERE TROPICAL STORM 2604 SINLAKU (2604) 980 HPA AT 26.9N 150.2E SEA AROUND OF MINAMITORISIMA MOVING NORTHEAST 17 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 300 MILES SOUTHEAST SEMICIRCLE AND 180 MILES ELSEWHERE. FORECAST POSITION FOR 191500UTC AT 28.5N 154.1E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 200300UTC AT 29.2N 158.4E WITH 42 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 40 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=