WCMX31 MMMD 240848 MMID SIGMET 2 VALID 240900/241500 MMMX- MMFO MAZATLAN OCEANICA FIR TC KRISTY OBS N1406 W11854 AT 0900Z FRQ TS FL550 WI 120NM OF CENTER MOV W 15KT INTSF. FCST TC 241500Z N1406 W12024=