WCMX34 MMID 210257 MMID SIGMET 1 VALID 210255/210855 MMMX- MMFO MAZATLAN OCEANICA FIR/UIR TC KENNETH OBS N1212 W10700 AT 0255Z OCNL TS TOPS FL520 WI 180NM OF CENTRE MOV WNW AT 12KT INTSF. FCST 210600 N1218 W10736 211200 N1236 W10848 211800 N1248 W10954=