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.
Under the influence of an active Intertropical Convergence Zone, the season got off to one of its earliest starts on record, with a depression developing over the Andaman Sea during January 4.
[1][2] By June 18, the monsoon covered most of the North Indian Ocean and parts of Gujarat, Konkan & Goa, Odisha, Jharkhand, Bihar and Gangetic West Bengal.
[2] During June 19, an eastward propagation of the Madden–Julian oscillation over the maritime continent, lead to the season's first area of low pressure developing over coastal parts of Bangladesh.
[2] During the final week of June the monsoon weakened, which led to the emergence of heatwave conditions over eastern parts of coastal India.
[2] Over the next two weeks a trough of low pressure and a cyclonic circulation, helped advance the monsoon into remaining parts of the Arabian Sea, central and north-western India.
[2] Over the next couple of weeks the monsoon gradually withdrew from the Arabian Sea, north-western and central parts of India, before Very Severe Cyclonic Storm Hudhud formed on October 7.
[2] After Hudhud had moved northwards and weakened into an area of low pressure, the southwest monsoon withdrew from the rest of India, Sri Lanka and the North Indian Ocean by October 18.
[2] Under the influence of an active Intertropical Convergence Zone (ITCZ), a low-pressure system formed over the Bay of Bengal on January 2, slowly organizing as it moved into a favorable environment.
It slowly consolidated, prompting IMD to classify it as a Depression on May 21, followed by JTWC issuing a Tropical Cyclone Formation Alert (TCFA) in the following hours.
The JTWC cancelled the TCFA issued for the system, stating that high wind shear had caused the convection to start dissipating.
On June 11, the system was upgraded to Cyclonic Storm intensity and was named Nanauk by the IMD as it continued to intensify under favorable environmental conditions.
As it tracked further northwestwards, the storm encountered moderate vertical wind shear, dry air and low sea surface temperatures, causing it to weaken rapidly into a Depression on June 13.
[2] Over the next day an area of low pressure formed, under the influence of this cyclonic circulation and rapidly concentrated into a Depression during July 21, over Odisha and West Bengal.
Waterlogging was reported in the cities of Cuttack and Bhubaneshwar, and nearly 200 villages were affected after the Baitarani river swelled more than two meters over its flood danger level.
Hudhud underwent rapid intensification in the following days, intensified into a Very severe cyclonic storm and developed a well-defined eye feature.
Shortly before landfall near Visakhapatnam, Andhra Pradesh on October 12, Hudhud reached its peak strength with three-minute wind speeds of 175 km/h (109 mph) and a minimum central pressure of 950 hPa (28.05 inHg).
It slowly consolidated and a Tropical Cyclone Formation Alert (TCFA) was issued by the Joint Typhoon Warning Center (JTWC) on October 24.
[31][32][33] On October 28, Nilofar underwent rapid intensification throughout the day, reaching a peak strength of 950 mbar (28.05 inHg) with wind speeds exceeding 205 km/h (127 mph), tied with Hudhud.