After tracking northeast, the system strengthened into a cyclonic storm on November 11, as maximum sustained winds exceeded 65 km/h (40 mph).

[1] At 0600 UTC on November 12, BOB 03 became a severe cyclonic storm and reached its maximum sustained wind speed of 100 km/h (60 mph),[1][nb 1] in addition to an estimated minimum barometric pressure of 984 mbar (29.1 inHg).

However, the Regional Meteorological Centre (RMC) in Kolkata, India bulletin at 0530 UTC on November 12, reported maximum sustained winds of only 55–75 km/h (35–45 mph).

The JTWC issued their final advisory on the storm at 1200 UTC on November 12, while it was centered about 200 km (125 mi) northeast of Kolkata.

According to the Odisha State Disaster Management Authority, the communication system had been activated and collectors in coastal districts were given satellite telephones.

[7] Prime Minister of Bangladesh Khaleda Zia urged senior officials in Dhaka and coastal districts to prepare for the storm.

In coastal areas, thousands of Red Crescent volunteers reported for duty in order to assist vulnerable villages in preparation of the storm.

[8] Winds destroyed bamboo huts, uprooted trees, and disrupted road transport between towns and villages on the shore of the Bay of Bengal.

[9] Heavy precipitation also lashed the capital city of Dhaka, inundating streets, which caused a shutdown of electricity and interrupting public transportation.

[7] Officials in West Bengal accused the meteorological offices of issuing warnings too late, as most of the fishermen were already in deep sea areas.

At a warehouse in Salt Lake City, Kolkata, the Indian Red Cross Society prepared to distribute 2,000 tarpaulins, 2,000 blankets, 200 kitchen sets, and 20,000 mosquito nets.