WSCN04 CWAO 271031
CZYZ SIGMET F3 VALID 271030/271430 CWUL-
CZYZ TORONTO FIR FRQ TS OBS WI N4720 W08534 - N4743 W08704 - N4850 W08647 -
N4830 W08220 - N4804 W08142 - N4720 W08534 TOP FL480 MOV ENE 15KT NC=