WTJP21 RJTD 280000 WARNING 280000. WARNING VALID 290000. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1603 MIRINAE (1603) DOWNGRADED FROM SEVERE TROPICAL STORM 992 HPA AT 20.5N 105.7E VIETNAM MOVING NORTHWEST 06 KNOTS. POSITION GOOD. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES EAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 281200UTC AT 21.1N 104.4E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA. BECOMING TROPICAL DEPRESSION. FORECAST POSITION FOR 290000UTC AT 21.9N 103.2E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=