WSCN27 CWAO 192204 CZQX SIGMET A2 VALID 192200/200200 CWUL- CZQX GANDER DOMESTIC FIR SEV ICE FCST WI 90NM WID LINE BTN /N4508 W05135/150 S CYYT - /N4800 W04630/ SFC/FL040 STNR WKN RMK GFACN34/CZQX GANDER OCEANIC FIR/CTA SIGMET F2=