WTJP21 RJTD 021200 WARNING 021200. WARNING VALID 031200. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 2606 JANGMI (2606) 980 HPA AT 32.3N 133.0E SEA SOUTH OF JAPAN MOVING NORTHEAST 23 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS. RADIUS OF OVER 30 KNOT WINDS 270 MILES SOUTHEAST SEMICIRCLE AND 240 MILES ELSEWHERE. FORECAST POSITION FOR 030000UTC AT 34.1N 137.4E WITH 25 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS. FORECAST POSITION FOR 031200UTC AT 36.0N 143.1E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS. EXTENDED OUTLOOK. FORECAST POSITION FOR 041200UTC AT 36.2N 146.8E WITH 55 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=