WSCN05 CWAO 272305 CZUL SIGMET B3 VALID 272305/280305 CWUL- CZUL MONTREAL FIR FRQ TS OBS WI 50NM WID LINE BTN N4418 W07810 - N4729 W07610 - N4737 W07337 TOP FL350 MOV E 35KT WKN=