In this scenario
entire FIRs have been affected by VA and entire FIRs have been closed, so you can find met indications on FIRs SIGMET
LIMM SIGMET 03 VALID 170930/171300 LIMM- LIMM MILANO FIR VA CLD FCST AT 170700Z SFC/FL200 N OF LINE N4650 E02752 - N4607 W01101 FL200/FL350 N OF LINE N4729 E02844 - N4429 E00201 FCST AT 171200Z SFC/FL200 N OF LINE N4408 E02131 - N4414 W00134 FL200/FL350 N OF LINE N4440 E02059 - N4423 E01258 - N4503 E00840 - N4331 E00416=
and closure information on notams
NEW TODAY TIL 1004171800EST
SIGNIFICANT ERUPTION WITH ASH EMISSION IN PROGRESS FM VOLCANO
EYJAFJALLAJOKULL 6338N01937W /ICELAND/.
MILANO FIR CONTAMINATED FM SFC TO FL350 INCLUDED.
ALL FLT OPS SUSPENDED EXC MIL, EMERG, HUMANITARIAN AND RESCUE FLT ACCORDING TO CIVIL AVIATION AUTHORITY PROVISION:
NOTAM LI/A2109/10
Hope this helps.