WSCN05 CWAO 270736
CZUL SIGMET C4 VALID 270735/271135 CWUL-
CZUL MONTREAL FIR FRQ TS OBS WI N5004 W07522 - N4907 W07444 - N4903 W07846 -
N4931 W07852 - N5004 W07522 TOP FL420 MOV SE 20KT NC=