WVRA31 RUOM 251436
UNOO SIGMET 1 VALID 251500/252100 UNOO-
UNOO OMSK FIR VA ERUPTION MT GRIMSVOTN LOC
N6425 W01720 VA CLD OBS 1200Z FL200/FL350
S OF LINE N5449 E07246 MOV N 40KMH NC=