Both the storms made landfall, and they, along with the deep depressions, were responsible for 128 deaths and economic losses worth at least $56.7 million (2012 USD).

The scope of this article is limited to the Indian Ocean in the Northern Hemisphere, east of the Horn of Africa and west of the Malay Peninsula.

Only two days later, the third depression of the season formed in southern Bay of Bengal and gradually strengthened into Cyclonic Storm Nilam.

On October 10, the IMD started to monitor a depression that had developed out of an area of convection, associated with the remnants of Severe Tropical Storm Gaemi about 350 km (215 mi) southeast of Kolkata, West Bengal.

[8] On October 23, the IMD reported that a depression had developed out of an area of low pressure about 800 km (495 mi) to the west of India's Amindivi Islands.

[15] The storm brought strong winds and heavy but beneficial rains within the areas of Bari region (Bossasso, Ishkushban and Bandar Beyla) according to the Somalia Water and Land Information Management.

[17] The India Meteorological Department (IMD) later upgraded the low-pressure area to a Depression on the same day, when the storm was located about 550 km (340 mi) east-northeast of Trincomalee, Sri Lanka.

Reporting that the storm reached a peak intensity of 55 knots (102 km/h; 63 mph) (1-min sustained winds), the JTWC issued their last advisory on the system.

The Puttalam – Mannar road was submerged under about a meter of water near Eluwankulama due to the overflowing of the Kala Oya river.

According to the police, a 27-year-old woman was killed when a sand rock fell on her house during heavy rains at Habaraduwa in Galle District.

It gradually drifted northwestwards and organized itself until on November 17, when the JTWC issued a TCFA on the system, reporting 30 knot winds at the center.

The same night, the JTWC initiated advisories on the system, classifying it as a tropical storm with one minute sustained winds of 35 knots.

Located just north of a subtropical ridge, BOB 03's inflow was affected by dry air that wrapped the center of the storm.

[34] At the same time, JTWC stopped tracking BOB 03, stating that the storm's wind speeds had diminished to below warning criteria.

[37] The Joint Typhoon Warning Center (JTWC) upgraded the storm into a tropical cyclone by 03:00 UTC of 23 December,[38] followed by Deep Depression status by the morning hours of the same day.