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Deep Depression ARB 02 (2008)

North Indian cyclone in 2008

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Through Iraq, Gross domestic product and United Nations

The storm sent a plume of moisture throughout the Arabian Peninsula, contributing to dust storms as far north as Iraq. However, the effects were most severe in Yemen, becoming the second-worst natural disaster in the country after deadly floods in 1996. The storm dropped heavy rainfall in a normally arid region, reaching around 91 mm (3.6 in), which caused flash flooding in valleys after waterways were unable to contain the approximately 2 billion m3 (528 billion gallons) of water that fell. Poor drainage practices and an invasive species of weed contributed to the floods, which damaged or destroyed 6,505 houses, leaving about 25,000 people homeless. The floods killed 180 people and severely disrupted the livelihoods of about 700,000 residents of Hadhramaut and Al Mahrah governorates, mostly farmers whose fields were washed away. Some of the buildings at the Shibam UNESCO World Heritage Site collapsed due to the floods. Overall damage was estimated at US$874.8 million, although residual losses from damaged infrastructure were estimated to cost an additional US$726.9 million. The overall economic impact of the storm was therefore estimated at US$1.638 billion, equating to roughly 6% of the country's gross domestic product.

After the scale of the damage became clear, the government of Yemen requested for assistance from the international community. The hardest hit areas had poor infrastructure, which caused difficulties in communications as relief goods were distributed. Nations in the region, including Saudi Arabia and the United Arab Emirates, sent money and supplies to help rebuild the damaged infrastructure and houses. Agencies under the United Nations provided food and logistical support. Relief efforts continued to make progress until 2011 due to a political uprising in Yemen.

Meteorological history

On October 11, an active phase of the Madden–Julian oscillation, in conjunction with an equatorial wind burst, produced twin areas of convection in the central Indian Ocean on both sides of the equator. The system in the southern hemisphere would become Tropical Storm Asma in the south-west Indian Ocean, and the system in the northern hemisphere would ultimately strike Yemen. The northern hemisphere system originated in the Bay of Bengal, and moved westward for much of its duration, steered by a ridge to the north along 15º N. On October 16, a low-pressure area developed over southern India near Kanyakumari. With low wind shear and warm waters of 27 to 28 °C (81 to 82 °F), the system slowly organized. On October 19, the India Meteorological Department (IMD) classified the low as a depression about 725 km (450 mi) southeast of the Yemeni island of Socotra. By that time, the convection had organized more, although it was displaced slightly from the center due to stronger wind shear.

The convection persisted along the western periphery of an elongated center, organizing enough for the American-based Joint Typhoon Warning Center (JTWC) to issue warnings on the depression on October 20, designating it Tropical Cyclone 03A. With marginally favorable conditions, the depression intensified slightly, and the IMD upgraded it to a 55 km/h (35 mph) deep depression on October 21, the same peak as the JTWC. That day, the system moved over Socotra as it reached an area of cooler water temperatures. Land interaction and dry air weakened the convection around the system as it approached the Gulf of Aden. The IMD downgraded the cyclone to depression status on October 22. On the next day, the JTWC discontinued advisories, and the IMD downgraded the system further to a remnant low to the northeast of Cape Guardafui, Somalia. The JTWC continued tracking the system as it moved northwestward, and the circulation made landfall near Ash Shihr in southeastern Yemen late on October 23, losing its identity shortly thereafter.

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