WSAU21 AMMC 041852

YMMM SIGMET F04 VALID 042000/042200 YMMC-

YMMM MELBOURNE FIR SEV TURB FCST WI S4010 E08740 - S3920 E09020 -

S4640 E09650 - S5000 E10720 - S5000 E09420 FL250/300 MOV E 10KT WKN=