Cyclone Sidr (
JTWC designation:
06B, also known as
Extremely Severe Cyclonic Storm Sidr) was a
tropical cyclone that resulted in one of the worst natural disasters in
Bangladesh. The fourth named storm of the
2007 North Indian Ocean cyclone season, Sidr formed in the central Bay of Bengal, and quickly strengthened to reach peak 1-minute sustained winds of 260 km/h (160 mph), making it a Category-5 equivalent tropical cyclone on the
Saffir-Simpson Scale. The storm eventually made landfall in
Bangladesh on November 15, 2007, causing large-scale evacuations. 3,447 deaths were blamed on the storm.