IMD 21Z升ESCS TROPICAL CYCLONE ADVISORY NO. 12 FOR NORTH INDIAN OCEAN (THE BAY OF BENGAL AND ARABIAN SEA) VALID FOR NEXT 120 HOURS ISSUED AT 0000 UTC OF 18.05.2020 BASED ON 2100 UTC OF 17.05.2020. SUB: EXTREMELY SEVERE CYCLONIC STORM ‘AMPHAN’ (PRONOUNCED AS UM-PUN) OVER CENTRAL PARTS OF SOUTH BAY OF BENGAL AND ADJOINING CENTRAL BAY OF BENGAL