hi ▁upgrad ed ▁the ▁low ▁pressure ▁area ▁to ▁a ▁De pression ▁and ▁designated ▁it ▁as ▁B OB ▁ 0 1 . ▁ ▁Meteor ological ▁History ▁▁ ▁On ▁April ▁ 1 1 , ▁an ▁upper ▁air ▁circul ation ▁developed ▁over ▁the ▁And aman ▁Sea , ▁where ▁it ▁moved ▁north - east wards ▁and ▁concentr ated ▁into ▁a ▁low ▁pressure ▁tr ough ▁over ▁the ▁next ▁day . ▁The ▁United ▁States ▁J oint ▁Ty ph oon ▁Warning ▁Center ▁( J TW C ) ▁started ▁monitoring ▁the ▁system ▁as ▁a ▁tropical ▁disturb ance ▁on ▁April ▁ 1 3 , ▁while ▁it ▁was ▁some ▁ ▁south west ▁of ▁Yang on . ▁J TW C ▁reported ▁that ▁the ▁disturb ance ▁was ▁located ▁within ▁a ▁fav ou rable ▁environment ▁for ▁further ▁development ▁and ▁that ▁con ve ction ▁had ▁started ▁to ▁wrap ▁into ▁the ▁el ong ated ▁low ▁level ▁circul ation ▁centre ▁. ▁The ▁system ▁continued ▁to ▁develop ▁and ▁was ▁class ified ▁as ▁De pression ▁B OB ▁ 0 1 , ▁by ▁the ▁India ▁Meteor ological ▁Department ▁( I MD ) ▁early ▁on ▁April ▁ 1 5 . ▁ ▁Pre par ations ▁ ▁My an mar ▁The ▁Union ▁Minister ▁for ▁Social ▁W elf are , ▁Rel ief ▁and ▁Res ett lement , ▁the ▁Vice ▁President , ▁minister s ▁and ▁dis aster ▁response ▁team ▁of ▁My an mar ▁had ▁an ▁emer gency ▁meeting ▁on ▁the ▁morning ▁of ▁April ▁ 1 6 ▁to ▁prepare ▁rescue ▁teams ▁and ▁ar range ▁food ▁and ▁water ▁stock p iles ▁in ▁dis aster ▁zones . ▁ ▁And aman