tornado

Japanese: トルネード

A large-scale tornado that occurs mainly in North America east of the Rocky Mountains. It is a powerful vortex accompanied by a funnel cloud hanging from the base of the parent cloud (cumulonimbus), and the wind speed near the center is over 100 meters per second. A sound similar to the roar of an airplane can be heard nearby. It is about several hundred meters in diameter, and moves while causing destruction. In the United States, 600 to 700 tornadoes occur annually (May is the most common month, followed by June), causing tremendous damage to buildings and other structures, and measures are taken by issuing forecasts and warnings similar to those for typhoons in Japan. Tornadoes that occur over water are called waterspouts.
→ Related topics Downburst | Tropical cyclone

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

主として北米ロッキー山脈以東に発生する大規模な竜巻。母雲（積乱雲）の雲底からたれ下がった漏斗(ろうと)雲を伴う強烈な渦巻で，中心付近の風速は毎秒100m以上。近くでは飛行機の爆音のような音がする。直径は数百m程度で，破壊を伴いながら移動する。米国では年間600〜700個のトルネードが発生し（５月が最も多く，６月がこれに次ぐ），建物などにばくだいな被害を出し，日本の台風同様の予報や警報を発して対策を講じている。なお，水上に発生するものをウォータースパウトという。
→関連項目ダウンバースト｜熱帯低気圧

出典　株式会社平凡社百科事典マイペディアについて　情報

<<: Trunojoyo (English spelling)

>>: Dolní Věstonice (English spelling)