WSAU21 AMMC 130025 YMMM SIGMET F02 VALID 130053/130453 YMMC- YMMM MELBOURNE FIR SEV TURB FCST WI S3910 E09420 - S3540 E10030 - S5000 E11300 - S5000 E10400 FL120/250 MOV E 20KT INTSF=