WTJP21 RJTD 111800 WARNING 111800. WARNING VALID 121800. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 2523 NAKRI (2523) UPGRADED FROM TROPICAL STORM 992 HPA AT 29.4N 132.3E SEA SOUTH OF JAPAN MOVING NORTHEAST 11 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 150 MILES EAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 120600UTC AT 31.0N 134.9E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 121800UTC AT 32.1N 138.1E WITH 57 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 60 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 131800UTC AT 34.3N 147.6E WITH 100 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 141800UTC AT 34.7N 158.3E WITH 160 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 60 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=