WTJP22 RJTD 071800 WARNING 071800. WARNING VALID 081800. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 2411 YAGI (2411) DOWNGRADED FROM TYPHOON 980 HPA AT 20.8N 105.7E VIETNAM MOVING SOUTHWEST SLOWLY. POSITION GOOD. MAX WINDS 60 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 40 MILES. RADIUS OF OVER 30 KNOT WINDS 180 MILES. FORECAST POSITION FOR 080600UTC AT 21.1N 104.8E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA. BECOMING TROPICAL DEPRESSION. FORECAST POSITION FOR 081800UTC AT 21.2N 103.8E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=