WVIN31 VOMM 110000 VOMF SIGMET 01 VALID 110000/110600 VOMM- VOMF CHENNAI FIR VA ERUPTION BARREN ISLAND PSN N1217 E09351 VA CLD OBS AT 101100Z FL040 N1215 E09354 - N1201 E09322 - N1221 E09318 - N1220 E09353 MOV SW 10KT FCST VA CLD +6 HR: 11/0600Z FL040 N1215 E09353 - N1202 E09314 - N1223 E09312 - N1220 E09353=