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

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.

[3] By April 14, deep convection persisted around the center of circulation;[4] following the development the RSMC in New Delhi, India designated the system as Depression BOB 01.

[12] Early on April 17, RSMC New Delhi reported that Bijli had weakened to a deep depression as it moved northwest.

[14] That night, the JTWC issued their final advisory on Tropical Cyclone 01B as it rapidly weakened over Bangladesh and Myanmar.

[16] Environmental analysis indicated that the system was in an area of favorable conditions to develop with low vertical wind shear and warm sea surface temperatures.

[16] During May 22 the disturbance developed further with a Tropical Cyclone Formation Alert being issued early the next day by the JTWC as the low level circulation center had become stronger and more defined.

[14] Early on June 21, the JTWC reported that an area of low pressure had persisted about 675 km, (420 miles), southwest of Mumbai, India.

The JTWC then cancelled their Tropical Cyclone Formation Alert, with the IMD issuing their final advisory later that day.

It hovered over Gujarat as a well marked area of low pressure before moving towards the northeast and re-emerging into the Arabian Sea where it redeveloped into a depression.

Moving slowing in a northerly direction, the system weakened into a well marked low-pressure area at 0000 UTC on 26 June over Kutch and its neighbouring regions.

[14] Early on July 20, RSMC New Delhi reported that Depression BOB 03 had formed about 120 km (75 miles) to the southeast of Digha.

[20] Early on September 3, the IMD reported that an area of low pressure had formed embedded within the monsoon off the Orissa coastline.

[14] Cyclonic Storm Phyan developed as a tropical disturbance to the southwest of Colombo in Sri Lanka late on November 4.

Over the next couple of days the disturbance gradually developed before weakening as it made landfall on Southern India on November 7.

After the disturbance had emerged into the Arabian Sea late on November 8 it rapidly became more marked with the India Meteorological Department (IMD) reporting early on November 9 that the disturbance had intensified into a Depression and designated it as Depression ARB 03 whilst the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert.

During the next day as the Depression turned towards the northeast, the IMD reported that it had intensified into a Cyclonic Storm and named it Phyan.

[30] On December 10, RSMC New Delhi announced that Depression BOB 05 had formed, about 400 km east-southeast of Batticaloa, Sri Lanka.

[32] After wandering some time to the east of Sri Lanka, the system made landfall near Trincomalee on December 14 as a Deep Depression.