WTJP21 RJTD 310000 WARNING 310000. WARNING VALID 010000. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. SEVERE TROPICAL STORM 2606 JANGMI (2606) 980 HPA AT 20.9N 128.2E SEA SOUTH OF OKINAWA MOVING NORTHNORTHWEST 09 KNOTS. POSITION FAIR. MAX WINDS 60 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 75 MILES. RADIUS OF OVER 30 KNOT WINDS 240 MILES. FORECAST POSITION FOR 311200UTC AT 22.5N 127.5E WITH 25 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 010000UTC AT 24.3N 127.0E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 965 HPA, MAX WINDS 70 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 020000UTC AT 29.2N 129.0E WITH 55 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. FORECAST POSITION FOR 030000UTC AT 33.7N 137.1E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 040000UTC AT 35.8N 145.4E WITH 100 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 050000UTC AT 36.9N 151.7E WITH 120 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 984 HPA, MAX WINDS 45 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=