WSCN24 CWAO 180831
CZYZ SIGMET P4 VALID 180830/181230 CWUL-
CZYZ TORONTO FIR FRQ TS OBS AT 0830Z WI 40NM WID LINE BTN /N4847 W07804/45 N
CYVO - /N4606 W07922/15 S CYYB TOP FL460 MOV ENE 25KT WKN
RMK GFACN33/CZUL MONTREAL FIR SIGMET U2=