WTPH23 RPMM 031800 TTT STORM WARNING 12 STS MATMO (2521) TIME 1800 UTC 00 17.7N 118.2E 985HPA 60KT P06HR WNW 10KT P+12 18.5N 115.2E P+24 19.5N 112.6E P+36 20.5N 110.6E P+48 21.6N 108.6E PAGASA=