WVAG31 SAME 131938 SAMF SIGMET 1 VALID 131938/140138 SAME- SAMF MENDOZA FIR VA ERUPTION MT PLANCHON PETEROA 357040 PSN S3513 W07034 VA CLD OBS AT 1910Z WI S3512 W07034 - S3518 W07006 - S3526 W07013 - S3518 W07032 - S3512 W07034 SFC/FL140 MOV SE 15 KT VA CLD FCST AT 0110Z WI S3513 W07034 - S3518 W07028 - S3525 W07016 - S3529 W07026 - S3517 W07035 - S3513 W07034 SFC/FL140=