WSCN04 CWAO 272039
CZYZ SIGMET L4 VALID 272035/280035 CWUL-
CZYZ TORONTO FIR FRQ TS OBS WI 50NM WID LINE BTN N4619 W07926 - N4713 W07800 -
N4810 W07643 TOP FL480 MOV E 35KT NC=