WSCN04 CWAO 270747
CZYZ SIGMET F1 VALID 270745/271145 CWUL-
CZYZ TORONTO FIR FRQ TS OBS WI 20NM WID LINE BTN N4737 W08631 - N4819 W08544 -
N4844 W08158 TOP FL520 MOV E 15KT NC=