WSAU21 AMMC 011435 YMMM SIGMET A01 VALID 011515/011915 YMMC- YMMM MELBOURNE FIR SEV TURB FCST WI S4500 E08300 - S4700 E08000 - S4230 E07500 - S3810 E07500 FL150/280 MOV E 20KT NC=