WSCN25 CWAO 272237 CZUL SIGMET B2 VALID 272235/280235 CWUL- CZUL MONTREAL FIR FRQ TS OBS WI 50NM WID LINE BTN /N4423 W07820/10 N CYPQ - /N4741 W07631/60 SE CYVO TOP FL480 MOV E 35KT WKN RMK GFACN33/CZYZ TORONTO FIR SIGMET L5=