WVIN31 VOMM 250330 VOMF SIGMET 01 VALID 250330/250930 VOMM- VOMF CHENNAI FIR VA ERUPTION BARREN ISLAND PSN N1217 E09351 VA CLD OBS AT 250320Z SFC/FL070 WI N1220 E09351 - N1216 E09356 - N1147 E09329 - N1200 E09323 MOV SW 05KT FCST AT 0930Z SFC/FL040 WI N1220 E09351 - N1216 E09356 - N1147 E09344 - N1147 E09329 - N1200 E09323=