WSAU21 AMMC 141447 YMMM SIGMET L02 VALID 141512/141912 YMMC- YMMM MELBOURNE FIR EMBD TS OBS WI S1540 E07500 - S1710 E07650 - S1630 E07920 - S2010 E07840 - S1940 E07500 TOP FL520 STNR NC=