WTPH20 RPMM 310600 TROPICAL CYCLONE WARNING 18 FINAL TROPICAL STORM YUTU (1826) ANALYSIS 310600UTC PSTN 18.0N 117.5E MOVE WNW 10KT PRES 990HPA MXWD 45KT 30KT 180NM NE 150NM SE 160NM SW 190NM NW FORECAST 24H 010600UTC PSTN 20.0N 116.4E CATE TROPICAL STORM FORECAST 48H 020600UTC PSTN 21.2N 116.4E CATE TROPICAL DEPRESSION FINAL WARNING PHILIPPINE ATMOSPHERIC GEOPHYSICAL AND ASTRONOMICAL SERVICES ADMINISTRATION=