WTJP21 RJTD 240600 WARNING 240600. WARNING VALID 250600. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 2520 BUALOI (2520) UPGRADED FROM TROPICAL STORM 992 HPA AT 10.3N 131.8E SEA EAST OF PHILIPPINES MOVING NORTHWEST 08 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 210 MILES SOUTHWEST SEMICIRCLE AND 180 MILES ELSEWHERE. FORECAST POSITION FOR 250600UTC AT 12.1N 128.9E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 60 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 260600UTC AT 13.7N 123.5E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 270600UTC AT 15.2N 115.4E WITH 140 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 60 KNOTS NEAR CENTER. FORECAST POSITION FOR 280600UTC AT 17.8N 110.9E WITH 200 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 70 KNOTS NEAR CENTER. FORECAST POSITION FOR 290600UTC AT 20.8N 105.2E WITH 250 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 65 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=