WTJP21 RJTD 190600 WARNING 190600. WARNING VALID 200600. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 2506 WIPHA (2506) UPGRADED FROM TROPICAL STORM 980 HPA AT 20.6N 119.0E SOUTH CHINA SEA MOVING WESTNORTHWEST 11 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 270 MILES EAST SEMICIRCLE AND 240 MILES ELSEWHERE. FORECAST POSITION FOR 191800UTC AT 21.6N 115.8E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 200600UTC AT 21.7N 113.2E WITH 57 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 55 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 210600UTC AT 21.0N 109.2E WITH 100 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 220600UTC AT 20.5N 106.1E WITH 120 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 230600UTC AT 20.5N 103.3E WITH 150 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 992 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=