WVOS31 LOWM 181215
LOVV SIGMET 4 VALID 181230/181830 LOWW-
LOVV WIEN FIR VA ERUPTION MT EYJAFJALLAJOKULL LOC N6338 W01937
VA CLD OBS BLW FL200 ENTIRE FIR MOV N
FCST 1400Z VA CLD N OF LINE N4652 E01608 - N4646 E01219 MOV N
FCST 1800Z VA CLD N OF LINE N4639 E01520 - N4732 E01558 - N4740
E01213 - N4648 E01058 MOV N=