WTJP31 RJTD 141500 WARNING 141500. WARNING VALID 151500. STORM WARNING. TROPICAL STORM 1607 CHANTHU (1607) 990 HPA AT 25.8N 144.4E OGASAWARA SHOTO MOVING NORTH 14 KNOTS. POSITION FAIR. MAX WINDS 45 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 180 MILES EAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 150300UTC AT 27.1N 144.3E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 151500UTC AT 28.1N 143.4E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=