WSCN07 CWAO 230549 CZQX SIGMET B2 VALID 230545/230945 CWUL- CZQX GANDER DOMESTIC FIR SEV ICE (FZRA) FCST WI 90NM WID LINE BTN N4947 W05543 - N5700 W05630 SFC/FL025 MOV WNW 10KT NC=