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Extremely Severe Cyclonic Storm Hudhud was a strong tropical cyclone that caused extensive damage and loss of life in eastern India and Nepal during October 2014. Hudhud originated from a low pressure system that formed under the influence of an upper-air cyclonic circulation in the Andaman Sea on October 6. Hudhud intensified into a cyclonic storm on October 8 and as a Severe Cyclonic Storm on October 9. Hudhud underwent rapid deepening in the following days and was classified as a Very Severe Cyclonic Storm by the IMD. Shortly before landfall near Visakhapatnam, Andhra Pradesh, on October 12, Hudhud reached its peak strength with three-minute wind speeds of and a minimum central pressure of . The system then drifted northwards towards Uttar Pradesh and Nepal, causing widespread rains in both areas and heavy snowfall in the latter. Hudhud caused extensive damage to the city of Visakhapatnam and the neighbouring districts of Vizianagaram and Srikakulam of Andhra Pradesh. Damages were estimated to be 21908 crore (US$3.4 billion) by the Andhra state government. At least 124 deaths have been confirmed, a majority of them from Andhra Pradesh and Nepal, with the latter experiencing an avalanche due to the cyclone. ==Meteorological history== Under the influence of an upper-air cyclonic circulation,a low-pressure area formed over the Andaman Sea on October 6.〔(【引用サイトリンク】url=http://www.webcitation.org/6T90ov8CS )〕 It slowly consolidated and was upgraded to a depression by the India Meteorological Department (IMD) on October 7. While over open waters, the depression continued to encounter a favorable environment, and a tropical cyclone formation alert (TCFA) was issued by the Joint Typhoon Warning Center (JTWC), followed by IMD upgrading the storm into a deep depression.〔(【引用サイトリンク】url=http://www.webcitation.org/6TE3F245V )〕〔(【引用サイトリンク】url=http://www.webcitation.org/6T90ZVBJX )〕 In the early hours of October 8, the JTWC started issuing its advisories for the system as it recorded tropical storm winds at the storm's centre.〔(【引用サイトリンク】url=https://web.archive.org/web/20141008033457/http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/warnings/io0314web.txt )〕 The IMD later reported that the deep depression made its first landfall over Long Island, Andaman, and had reached cyclonic storm intensity, naming it ''Hudhud''.〔(【引用サイトリンク】url=https://web.archive.org/web/20141008072444/http://www.rsmcnewdelhi.imd.gov.in/images/bulletin/indian.pdf )〕 After entering the Bay of Bengal, Hudhud continued to intensify the following day, and was upgraded to a severe cyclonic storm. Early on October 10, the JTWC classified the storm as a Category 1 tropical cyclone after it formed a microwave eye feature and was located in an environment favorable for further intensification with moderate wind shear.〔(【引用サイトリンク】url=http://www.webcitation.org/6TDsq5GQz )〕 The IMD upgraded Hudhud to a very severe cyclonic storm later the same day, and the JTWC further upgraded the storm to a Category 2 tropical cyclone.〔(【引用サイトリンク】url= http://www.webcitation.org/6TEAIVGSI )〕 On October 11, Hudhud underwent rapid intensification and developed an eye at its center. In the following hours, the storm reached its peak intensity with a minimum central pressure of and three-minute average windspeeds of . Maintaining intensity, it made landfall over Visakhapatnam, Andhra Pradesh at noon of October 12, near . The maximum wind gust recorded by the High Wind Speed Recorder (HWSR) instrument of the Cyclone Warning Center in Visakhapatnam was . Measured by the Doppler weather radar stationed in the city, the storm's eye was in diameter. The strength of the winds disrupted telecommunication lines and damaged the Doppler radar, inhibiting further observations.〔(【引用サイトリンク】url=http://www.webcitation.org/6TsV5gEgN )〕 Bringing extensive damage to the coastal districts of Andhra Pradesh, Hudhud gradually weakened as it curved northwards over land. The storm continued its weakening trend and was last noted as a well-marked low pressure area over east Uttar Pradesh on October 14.〔(【引用サイトリンク】url = http://www.webcitation.org/6TKrYxxhR )〕 Unlike most BoB storms that dissipate quickly over land, Hudhud has been the only TC whose remnant ever reached as far north as the Himalayas.〔(Wang et al. 2015) https://www.researchgate.net/publication/283425229_THE_DEADLY_HIMALAYAN_SNOWSTORM_OF_OCTOBER_2014_SYNOPTIC_CONDITIONS_AND_ASSOCIATED_TRENDS〕 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 Hudhud」の詳細全文を読む スポンサード リンク
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