WSZA21 FAOR 170931 FACA SIGMET I02 VALID 171000/171400 FAOR- FACA CAPE TOWN FIR EMBD TS FCST WI S3138 E01500 - S3153 E01851 - S3624 E01957 - S3700 E02155 - S3700 E01500 TOP FL350=