|
Intense Tropical Cyclone Indlala was a tropical cyclone that caused severe damage in Madagascar in 2007. The 12th tropical system, 9th named storm, and 5th intense tropical cyclone of the 2006-07 South-West Indian Ocean cyclone season, Indlala developed on March 3, 2007 as a tropical depression. It moved westward and was upgraded to Tropical Depression 12 on March 6. In an area of favorable environment for tropical cyclone formation, it tracked westward, steadily intensifying. It was upgraded to Moderate Tropical Storm Indlala on March 12. It continued to intensify and became a Severe Tropical Storm the next day. It then became a Tropical cyclone that same day as it moved westward and was upgraded to Intense Tropical Cyclone Indlala as it reached its peak intensity of 155 mph shortly before making landfall in the northeastern section of Madagascar. The storm resulted in 150 fatalities in Madagascar. 126 people were also reported missing, and 125,000 people were directly affected by the storm. Severe flooding, high wind and storm surge pounded the coastal areas, while inland, flooding from heavy rainfall caused extreme damage. In Maroanstetra, one of the hardest hit regions, the entire region was flooded, and 90 percent of the surrounding villages were flooded. Ten percent of the concrete houses and 35 percent of traditional wood houses were destroyed there. Damage totaled to US$240 million.〔http://shequ2.tool.hexun.com/ExpertFiles/20080409/363810/F9579F9BD58D1773D30999ADE1C96211.pdf〕 ==Meteorological history== Indlala's origins were from a large monsoonal low pressure system on March 3, 2007, near 14.9°N, 61.8°N. The low pressure system began to intensify, with deep convection developing around the center of circulation. The system began to track westward with an increasingly better-defined center. Lower-level inflow was favorable for tropical cyclone development, but upper-level divergence was weak. The system was then upgraded to Tropical Depression 12, with the increased convection and a well-defined center. However, within 12 hours, the storm entered an area of high wind shear which led to the northeastern section of the storm's circulation to be exposed. The system reorganized and was once again in a steady intensification period. On March 12, the system was upgraded to Moderate Tropical Storm Indlala. The system continued to intensify and later that day on March 12, the storm was upgraded to Severe Tropical Storm Indlala. It remained in an area of favorable development and began to show an eye on satellite images. The next day, Indlala was upgraded to Tropical Cyclone Indlala. A well-defined eye persisted while the storm was still steadily intensifying. It continued moving west, then turned on a more west-southwestward track, around the northeastern periphery of a sub-tropical ridge, towards a weakness in the ridge located over Madagascar. Upper-level outflow remained good, and convection was banding around the center. This proved that the cyclone remained a healthy storm.〔 On March 14, the storm was upgraded to Intense Tropical cyclone Indlala with all the features of a well-developed and healthy tropical cyclone. The storm turned on a southwestward track, and reached its peak intensity of 935 hPa on March 14.〔 Indlala, now at its peak intensity, was just miles off the coast of Madagascar.〔 On March 15, the system made landfall on the Masoala Peninsula, in Madagascar, as an intense tropical cyclone.〔(【引用サイトリンク】title=Intense Tropical cyclone Indala advisory #19 )〕 No sooner had Indlala made landfall, when it was downgraded to Tropical Cyclone Indlala, with the northern section of the circulation exposed. The system turned to the south over land, dissipating on March 18.〔http://www.webcitation.org/5nZju6Waz〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cyclone Indlala」の詳細全文を読む スポンサード リンク
|