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WSBZ23 SBGL 231740

SBAZ SIGMET 73 VALID 231745/231930 SBAZ - SBAZ AMAZONICA FIR EMBD TS FCST WI S0727 W04751 - S0809 W04640 - S0746 W04534 - S0618 W04448 - S0612 W04429 - S0542 W04733 - S0727 W04751 TOP FL470 MOV W 10KT INTSF=