Cyclones BOB 03 and Yemyin

Throughout three countries, 983 people were killed: 730 in Pakistan, 140 in India, and 113 in Afghanistan. In all, the storms wrought roughly $2.1 billion in damage in India and Pakistan.

Meteorological history

A low-pressure area associated with the monsoon trough was first detected by the Naval Research Laboratory in the Bay of Bengal on 17 June. Over the next few days, it developed a deep flaring convection near an exposed low-level circulation centre (LLCC) as it drifted in the open sea. Despite moderate to high vertical wind shear, the disturbance produced surface pressure falls of up to 2.7 mbar (hPa) in Port Blair, in the Andaman Islands, on 19 June. Convection persisted around the increasingly well-defined LLCC, and the disturbance continued to consolidate under favourable diffluence.

Early on 21 June, the India Meteorological Department (IMD) declared the area a depression, 430 km (270 mi) east-southeast of Kakinada, Andhra Pradesh, India. Several hours later, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert (TCFA), with winds near 30 knots (56 km/h; 35 mph). The depression moved quickly west-northwest towards the northern Andhra Pradesh coast. A subtropical ridge to the north weakened the wind shear which had been hindering the storm's development, allowing for further intensification. Later that day, the IMD upgraded the system to a deep depression. As convection organised with increasing ocean heat content, the JTWC issued its first warning on Tropical Cyclone 03B.

The deep depression made landfall near Kakinda early on 22 June local time. The JTWC issued its final advisory later, as the system began to weaken due to land interaction and wind shear. The next day, the IMD downgraded it to a depression while it crossed the Deccan Plateau. The final warning was issued on 24 June, despite the storm having moved into the Arabian Sea.

The JTWC noted in its Significant Tropical Weather Outlook for the North Indian Ocean on 24 June that strong monsoonal low-level flow contributed to increased cyclonic vorticity, with low vertical wind shear and warm sea surface temperatures. It warned that these factors could lead to a rapid regeneration of the cyclone. Early on 25 June, the JTWC issued the second TCFA for this system as its LLCC crossed the coast into the Arabian Sea. Shortly after the JTWC resumed advisories on the depression, while IMD considered it as a separate system from BOB 03.

As it moved northwest just off the Pakistani coast, winds of about 26 knots (48 km/h; 30 mph) and a surface pressure of 990 mbar (hPa) were observed in Karachi near midday on 25 June. According to the PMD, the centre of the system reached within 90 km (56 mi) of Karachi. With favourable conditions and deep convection, the system intensified into a deep depression that day. After further organization, it made its second landfall at about 0300 UTC 26 June along the Makran coast, near Ormara and Pasni, Balochistan Province, in southwestern Pakistan. Upon reaching land, the cyclone began to weaken slowly, and the JTWC issued its last advisory late on 26 June.