Severe turbulence SHOULD mean that all flights in the relevant area should be cancelled
WSAU21 ASRF 170708
YBBB SIGMET SY07 VALID 170800/171200 YSRF-
YBBB BRISBANE FIR SEV TURB FCST WI YHAY - HRD - YGDA - YSTW - S3330
E15300 - S3730 E15100 - YMCO - YSWG - YHAY BLW A100 STN NC
STS:REV SIGMET SY06 170800/171200
I assume that there are/will be no aircraft movements below A100 within this area ????
Dr 