WSCN04 CWAO 272236
CZYZ SIGMET N2 VALID 272235/280235 CWUL-
CZYZ TORONTO FIR FRQ TSGR OBS WI 20NM WID LINE BTN N4402 W08146 - N4252 W08208 -
N4158 W08313 TOP FL500 MOV E 30KT NC=