WSCN05 CWAO 270502
CZUL SIGMET C3 VALID 270500/270900 CWUL-
CZUL MONTREAL FIR FRQ TS OBS WI N5059 W07646 - N4941 W07602 - N4934 W07906 -
N5017 W07821 - N5059 W07646 TOP FL420 MOV ESE 20KT WKN=