WSCN05 CWAO 180400
CZUL SIGMET O3 VALID 180400/180800 CWUL-
CZUL MONTREAL FIR FRQ TS OBS WI N4950 W07422 - N4950 W07243 - N4817 W07419 -
N4834 W07504 - N4950 W07422 TOP FL430 MOV E 35KT WKN=