WTJP31 RJTD 030900 WARNING 030900. WARNING VALID 040900. STORM WARNING. SEVERE TROPICAL STORM 2606 JANGMI (2606) 985 HPA AT 35.8N 142.9E SEA EAST OF JAPAN MOVING EASTNORTHEAST 28 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS. RADIUS OF OVER 30 KNOT WINDS 350 MILES EAST SEMICIRCLE AND 240 MILES ELSEWHERE. FORECAST POSITION FOR 032100UTC AT 36.7N 146.1E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS. FORECAST POSITION FOR 040900UTC AT 36.8N 148.0E WITH 42 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 984 HPA, MAX WINDS 50 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=