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Cyclone Sidr

North Indian Ocean cyclone in 2007

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Save the Children estimated between 3,100 and 10,000 deaths associated with the cyclone, while the Red Crescent Society reported on November 18 that the number of deaths could be up to 15,000. Other aid agencies have also estimated a death toll of up to 15,000. International groups pledged US$95 million in assistance, while damage estimated at 196.25 billion taka (US$2.31 billion).

Meteorological history

On November 9, an area of disturbed weather developed southeast of the Andaman Islands, with a weak low-level circulation near the Nicobar Islands. Initially moderate upper-level wind shear inhibited organization, while strong diffluence aloft aided in developing convection. Vertical shear decreased greatly as the circulation became better defined, and a Tropical Cyclone Formation Alert was issued on November 11 while located a short distance south of the Andaman Islands. Around the same time, the India Meteorological Department (IMD) designated the system as Depression BOB 09. The Joint Typhoon Warning Center (JTWC) upgraded it to Tropical Cyclone 06B after Dvorak estimates indicated winds of 65 km/h (40 mph). Later that day, it intensified into a deep depression as it moved slowly north-westward.

The IMD upgraded the system to Cyclonic Storm Sidr early on November 12. The system then began to intensify quickly as it moved slowly northwestward, and the IMD upgraded it to a severe cyclonic storm later that day and a very severe cyclonic storm early the next day. On the morning of November 15, the cyclone intensified to reach peak winds of 215 km/h (135 mph) according to the IMD, and a peak of 260 km/h (160 mph) according to the JTWC best track. Sidr officially made landfall around 17:00 UTC later that day, with sustained winds of 215 km/h (135 mph). It weakened rapidly after landfall and the final advisories were issued early on November 16.

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