WSAU21 AMMC 031828 YMMM SIGMET P02 VALID 031854/032254 YMMC- YMMM MELBOURNE FIR EMBD TS FCST WI S1310 E08130 - S1840 E08240 - S2230 E07600 - S1840 E07730 - S1430 E07500 - S0910 E07500 TOP FL520 STNR NC=