WSCN04 CWAO 271739
CZYZ SIGMET L3 VALID 271735/272135 CWUL-
CZYZ TORONTO FIR FRQ TSGR OBS WI 40NM WID LINE BTN N4629 W08222 - N4706 W08109 -
N4753 W08019 TOP FL520 MOV E 35KT NC=