2020 North Indian Ocean cyclone season

Super cyclonic storm (IMD)
Category 5 tropical cyclone (SSHWS)
Duration	May 16 – May 20
Peak intensity	240 km/h (150 mph) (3-min)  920 hPa (mbar)

At 00:00 UTC on May 16, a depression formed in the southeast Bay of Bengal and was identified as BOB 01. Six hours later, the Indian Meteorological Department (IMD) upgraded the system to a deep depression. The system began bringing torrential rainfall to Sri Lanka and Southern India. Around 15:00 UTC, the system further developed into Cyclonic Storm Amphan.[2][3] That morning, landslide and flooding warnings were hoisted for parts of eastern Sri Lanka and the Indian state of Kerala were given expectations of torrential rainfall in the coming days.[4] By 09:00 UTC of May 17, Amphan had intensified into a very severe cyclonic storm. Within 12 hours, the storm had developed an eye and started to rapidly intensify, becoming an extremely severe cyclonic storm. According to the JTWC, it explosively intensified from a Category 1-equivalent cyclone to a Category 4-equivalent cyclone in just 6 hours. The following morning around 10:30 UTC, the IMD upgraded Amphan to a super cyclonic storm with 3-minute sustained winds of 240 km/h (150 mph) and a minimum pressure of 920 hPa (27.46 inHg). This marked the second year in a row featuring a super cyclonic storm, the previous year seeing Kyarr in the Arabian Sea. On May 20, at approximately 17:30 IST, the cyclone made landfall near Bakkhali, West Bengal after weakening subsequently. It rapidly weakend once inland, and dissipated on the next day. It left behind a trail of catastrophic damage, and was later confirmed to be the costliest storm ever in the basin.

Depression (IMD)
Duration	May 29 – May 31
Peak intensity	45 km/h (30 mph) (3-min)  1000 hPa (mbar)

A depression formed overland near Salalah, Oman on May 29.

The Public Authority for Civil Aviation (PACA) in Oman advised residents to exercise caution and not to venture to low-lying areas or sea. The Supreme Committee asked people to remain at home in non-emergency circumstances.[5] The hospital in Sadah was evacuated as the depression intensified.[6] Over 200 mm (7.9 in) of rain fell in Dhofar Governorate on May 29;[7] some areas received the equivalent of two years of rainfall.[8] The highest precipitation total was measured in Mirbat, where 1,055 mm (41.5 in) of rain fell.[9] Two days of heavy rainfall, accumulating to 260 mm (10 in), caused floods in Salalah.[10] Operations at the port of Salalah were interrupted by the tropical depression.[11] Residents in central Salalah experienced disruptions to power and water services. Military police were dispatched to clear roads and airlift people marooned by the floods.[12] Engineering teams from the Ministry of Defence were deployed to restore utilities and render air where necessary.[13] Two people were found dead in a wadi due to flash floods,[14] while another person died and three were injured when a building collapsed.[8] More than 50 people were rescued from floods.[15]

Severe cyclonic storm (IMD)
Category 1 tropical cyclone (SSHWS)
Duration	June 1 – June 4
Peak intensity	110 km/h (70 mph) (3-min)  990 hPa (mbar)

During May 31, an area of low pressure developed over the south-eastern Arabian Sea and remained as a well marked low pressure area over the same region until the evening. It strengthened into a depression over the east-central and south-east Arabian Sea in the early morning of June 1 when it was centered about 340 km south-west of Goa, 630 km south-southwest of Mumbai and 850 km south-southwest of Gujarat. On June 2, around noon, the prevailing deep depression intensified into a cyclonic storm thereby receiving the name Nisarga. Nisarga intensified into a severe cyclonic storm before making landfall near the coastal town of Alibag in Maharashtra at 12:30 (IST) on June 3. The cyclone subsequently weakened into a deep depression by June 4.[16]