WTJP31 RJTD 161500 WARNING 161500. WARNING VALID 171500. STORM WARNING. SEVERE TROPICAL STORM 1501 MEKKHALA (1501) 980 HPA AT 11.3N 127.8E SEA EAST OF PHILIPPINES MOVING WEST 09 KNOTS. POSITION FAIR. MAX WINDS 55 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 50 MILES. RADIUS OF OVER 30 KNOT WINDS 210 MILES NORTH SEMICIRCLE AND 150 MILES ELSEWHERE. FORECAST POSITION FOR 170300UTC AT 11.8N 126.3E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. FORECAST POSITION FOR 171500UTC AT 12.6N 124.7E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=