WTJP21 RJTD 020600 WARNING 020600. WARNING VALID 030600. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 2606 JANGMI (2606) 980 HPA AT 30.7N 130.6E SEA SOUTH OF JAPAN MOVING NORTHEAST 20 KNOTS. POSITION GOOD. MAX WINDS 50 KNOTS. RADIUS OF OVER 30 KNOT WINDS 270 MILES SOUTHEAST SEMICIRCLE AND 240 MILES ELSEWHERE. FORECAST POSITION FOR 021800UTC AT 33.3N 135.0E WITH 25 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS. FORECAST POSITION FOR 030600UTC AT 34.8N 140.6E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS. EXTENDED OUTLOOK. FORECAST POSITION FOR 040600UTC AT 36.3N 146.0E WITH 55 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=