WTJP21 RJTD 190600 WARNING 190600. WARNING VALID 200600. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 2604 SINLAKU (2604) DOWNGRADED FROM SEVERE TROPICAL STORM 985 HPA AT 27.4N 151.0E SEA AROUND OF MINAMITORISIMA MOVING NORTHEAST 17 KNOTS. POSITION FAIR. MAX WINDS 45 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 300 MILES SOUTHEAST SEMICIRCLE AND 180 MILES ELSEWHERE. FORECAST POSITION FOR 191800UTC AT 29.0N 155.5E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 40 KNOTS NEAR CENTER. FORECAST POSITION FOR 200600UTC AT 29.3N 160.1E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 994 HPA, MAX WINDS 40 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=