WSGL31 BGSF 041135 BGGL SIGMET U03 VALID 041230/041530 BGSF- BGGL NUUK FIR SEV TURB FCST AT 1230Z WI N6357 W05134 - N6403 W04822 - N6636 W04958 - N6602 W05148 - N6443 W05154 - N6357 W05134 SFC/FL110 WKN FCST AT 1530Z WI N6639 W05420 - N6710 W04945 - N6604 W04927 - N6531 W05324 - N6639 W05420=