WSCN04 CWAO 201447 CZYZ SIGMET D2 VALID 201445/201845 CWUL- CZYZ TORONTO FIR SEV ICE (FZRA) FCST WI 30NM WID LINE BTN N4351 W07920 - N4405 W07822 - N4412 W07635 SFC/FL025 STNR WKN=