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May 1997 Bangladesh cyclone
The May 1997 Bangladesh cyclone was a powerful storm that caused widespread damage and loss of life throughout Bangladesh. Originating from a near-equatorial trough on May 15, 1997, the cyclone tracked in a general northward direction throughout its existence. The system gradually intensified over the following days, reaching the equivalent of a Category 1 hurricane on the Saffir-Simpson Hurricane Scale by May 17. The following day, the storm attained its peak intensity with winds of 215 km/h (135 mph) according to the JTWC and 165 km/h (105 mph) according to the IMD along with a barometric pressure of 964 mbar (hPa; 28.47 inHg). On May 19, the cyclone made landfall near Chittagong, Bangladesh before rapidly dissipating the next day.
Prior to the storm's landfall, official in Bangladesh prompted more than 500,000 residents to evacuate from coastal areas and seek shelter. Despite the large-scale evacuation, more than 1,000 people perished as a result of the cyclone, most of which took place offshore. Numerous structures were damaged or destroyed throughout the affected region and electricity was lost for millions of people. In some areas, entire villages were leveled by the cyclone's storm surge. In the wake of the storm, water-borne diseases began to spread due to standing water and bodies being left out in the open. In response to the disaster, funds from across the globe were sent into Bangladesh to help the country recover.
==Meteorological history==
On May 13, a near-equatorial trough developed. The poorly organized system slowly tracked towards the north-northwest. The following day, deep convection consolidated around the center of circulation and the Joint Typhoon Warning Center (JTWC) classified the system as Tropical Cyclone 01B.〔 On May 15, the India Meteorological Department (IMD) also began monitoring the system; however, they classified it as Depression BOB 01. Favorable upper-level conditions and good outflow allowed the storm to intensify. Shortly after, the cyclone attained tropical storm-force winds and turned towards the northeast. While gradually increasing in forward motion, the storm continued to strengthen.〔 The IMD eventually upgraded the system to a cyclonic storm on May 16.〔
On May 17, the cyclone attained winds of 120 km/h (75 mph), equivalent to a Category 1 hurricane on the Saffir-Simpson Hurricane Scale. By May 18 an eye developed and the storm reached its peak intensity with winds of 215 km/h (135 mph).〔 At this time, the IMD assessed BOB 01 to have winds of 165 km/h (105 mph 3-minute sustained) and a barometric pressure of 964 mbar (hPa; 28.47 inHg).〔 The cyclone made landfall the following day near Chittagong, Bangladesh at this intensity.〔〔 After landfall, the storm rapidly tracked northeastward inland and dissipated early on May 20.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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