These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean.

The season began with the formation Cyclone Maarutha on April 15 and ended with the dissipation of a deep depression on December 9.

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.

The official Regional Specialized Meteorological Centre in this basin is the IMD, while the Joint Typhoon Warning Center (JTWC) releases unofficial advisories.

Under the influence of strong monsoon surge a disturbance developed over Bay of Bengal travelled westwards and intensified to an unnamed depression.

A strong monsoon surge prevented formation of systems until a deep depression formed over West Bengal in October and caused heavy rainfall.

A couple of depressions formed between mid-October and November which continued the rain spell causing destruction of life and property.

Very Severe Cyclonic Storm Ockhi formed in early December and wreaked havoc in the countries where it impacted.

The system moved very fast under the influence of mid-latitude trough in westerlies lying over India in the middle and upper tropospheric levels.

[18] Additionally, although not directly related to the storm, the precursor low of Mora strengthened the arrival of the monsoon, which caused heavy flooding in Sri Lanka and the Andaman Islands that killed 208 people.

[19] Moving nearly north-northeastwards, it intensified into a deep depression over north Bay of Bengal in the night of 11th (1800 UTC)and peaked with estimated 3-minute sustained windspeeds of 55 km/h (35 mph).

[22] A low-pressure area consolidated into a depression over the northwestern and adjoining west-central Bay of Bengal, off the Odisha coast on July 17.

The depression moved in a generally northwestwards direction without intensifying, and made landfall on India's Odisha coast, south of Puri, at about 15:00 UTC (20:30 IST) on July 18.

Under active monsoonal conditions, a low-pressure area formed over the north Bay of Bengal, near south Bangladesh on October 8.

[36] The Madden–Julian oscillation lay over phase 4 with amplitude 1 and these conditions helped in maintaining the intensity of the system and associated convection and thus the storm intensified further into a deep depression later on the same day.

[37] An anticyclonic circulation lay over central India in the middle & upper tropospheric levels thus making the system move in a north-northwesterly direction.

The storm encountered with strong wind shear, which caused it to weaken rapidly into a low-pressure area over west Jharkhand, on October 10.

[44] Maritime ports of Chittagong, Cox's Bazar, Mongla and Payra had been advised in Bangladesh to hoist local cautionary signal number three.

[49] After landfall, the system remained near the coastline, allowing moisture incursion from the Bay of Bengal to prevent rapid weakening.

Initially tracking northwards, the system soon recurved towards the northeast before weakening into an area of low pressure early on October 22, while located over northeastern Bangladesh, Meghalaya, and southern Assam.

[58] On November 17, BOB 06 weakened off the coast of north Odisha into a well-marked low-pressure area as it encountered strong wind shear, with the IMD issuing their final advisory on the system.

[59] Depression BOB 06 caused heavy rainfall, damaging standing paddy crops in Sompeta, Vajrapukotturu, Ichchapuram, Mandasa and some other areas in Srikakulam district in Andhra Pradesh.

[65][66] On November 20, the remnant energy of Tropical Storm Kirogi led to the formation of a new low-pressure area over the Gulf of Thailand.

[67] During the next several days, the system moved into Bay of Bengal and slowly drifted westward, but the storm was unable to organize significantly, due to unfavorable conditions.

[68] Due to the storm's rapidly consolidating low level circulation center the JTWC issued a TCFA on the system, shortly before classifying it as Tropical Cyclone 03B.

The system slowly drifted westwards in the Bay of Bengal, but failed to organize rapidly due to strong wind shear.

[83] However an overall weak structure of the storm was noted and it rapidly weakened into a well-marked low-pressure area off the coast of West Bengal and Bangladesh on the evening of December 9.

[84] Due to heavy rains under the influence of the storm paddy harvests died down in some parts of Rupsa block in Balasore and some pockets in Mayurbhanj district in Odisha.

Paddy in acres of land was damaged in the rain at Badaopalasa, Bagedihi, Badepataka, Kendua, Olidihai, Burupalsa, Tupaghutu, Segeghutu, Jharadihui, Badakedam, Pokharia, Kuladiha, Rangamatia, Suruda, Anlajodi, Bahalda, Kanki, Basing and Gidighati.

[85] In Bangladesh, the maritime ports of Chittagong, Cox's Bazar, Mongla and Payra had been advised to keep hoisted local cautionary signal no three.