The season began on May 16 with the designation of Depression BOB 01 in the Bay of Bengal, which later became Cyclone Amphan, the strongest storm in the Bay of Bengal recorded since the 1999 Odisha cyclone and breaking the record of Cyclone Nargis of 2008 as the costliest storm ever recorded in the basin. Two more cyclones formed in the Arabian Sea, ARB 01, affecting Yemen and Oman, and Cyclone Nisarga, which made landfall in Maharashtra. After a four-month pause of activity, BOB 02 formed, causing 98 fatalities. Its remnants formed ARB 03. It was a weak storm. After 2 days, BOB 03 formed, impacting and affecting West Bengal, Bangladesh and Northeast India. It was also a weak storm, lasting for 2 days. After its break, Cyclone Gati formed, leaving 8 confirmed, 30 missing as of today, on Somalia and Yemen, where the cyclone took place. On November 23, a depression formed in the Bay of Bengal, and it strengthened into Very Severe Cyclonic Storm Nivar, two days later. It made landfall between Puducherry and Chennai close to Mahabalipuram in the midnight of November 25. It weakened into a well marked low pressure in the early hours of November 27. On November 28, a low pressure formed off the coast of Tamil Nadu, it gradually intensified into a depression, BOB 05. It later intensified into a deep depression and then into a cyclonic storm, named Cyclone Burevi. It made landfall on Sri Lanka as a weak cyclonic storm before it degenerated to an area of low pressure.
