Tornado Alley, intense thunderstorms, Atmospheric instability, cold, dry air from Canada and the Rocky Mountains, warm, moist air from the Gulf of Mexico and hot, dry air from the Sonoran Desert, northern Texas (including the Panhandle), Oklahoma and Kansas, the Central United States. 龍捲風巷, 強烈雷暴, 大氣穩定度, 來自加拿大與洛磯山脈的乾冷氣團, 來自墨西哥灣的暖濕氣團和索諾蘭沙漠乾熱氣團, 德州北部(包括狹長地帶), 俄克拉何馬州和堪薩斯州, 美國中部.

Tornado alley: An American flag flies over a mound of debris in a neighborhood in Moore, Oklahoma, on Thursday. Soon after a killer tornado blew through the town, in the suburbs of Oklahoma City, a few days before, residents began displaying flags as symbols of hope and unity. | THE WASHINGTON POST

Tornado alley: Moore, Oklahoma, is located in an area of the US that averages 62 tornadoes a year
Ledonna and Steve Cobb: Mother pictured in iconic photo of Oklahoma tornado devastation describes how she 'held on for dear life' to stop Briarwood students from flying away | Mail Online http://www.dailymail.co.uk/news/article-2328749/Ledonna-Steve-Cobb-Mother-pictured-iconic-photo-Oklahoma-tornado-devastation-describes-held-dear-life-stop-Briarwood-students-flying-away.html
Storm chasers ride the winds undaunted by danger | The Japan TimesThe Japan Times http://www.japantimes.co.jp/news/2013/05/29/world/storm-chasers-ride-the-winds-undaunted-by-danger/#.UaYeK9JIiaT

Deadliest Tornadoes: The New 'Tornado Alley' (INFOGRAPHIC) http://www.huffingtonpost.com/2013/05/21/deadliest-tornadoes_n_3313788.html

A diagram of tornado alley's rough location (red), and its contributing weather systems
Tornado Alley - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Tornado_Alley
Sonoran Desert - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Sonoran_Desert
索諾蘭沙漠 - 維基百科，自由的百科全書 http://zh.wikipedia.org/wiki/%E7%B4%A2%E8%AF%BA%E5%85%B0%E6%B2%99%E6%BC%A0
Thunderstorm - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Thunderstorm
雷暴 - 維基百科，自由的百科全書 http://zh.wikipedia.org/wiki/%E9%9B%B7%E6%9A%B4
Atmospheric instability - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Atmospheric_instability
atmospheric stability - 大氣穩定度 http://terms.naer.edu.tw/detail/1246102/
新聞辭典／龍捲風巷 | 龍捲風襲美 | 全球觀察 | 聯合新聞網 http://udn.com/NEWS/WORLD/WORS1/7913487.shtml
地理位置獨特 「龍捲風巷」極端氣候多｜焦點新聞｜中時電子報 http://news.chinatimes.com/focus/11050105/112013052200080.html
感謝您的光臨 "est100 一些攝影", (非營利, 沒刊登廣告) . Thank you for visiting  "est100 some photos" , (non-profit , No Advertising).  ( okok ten times "1" ) http://okok1111111111.blogspot.tw/
est100 一些攝影 4 (非營利, 沒刊登廣告) 健康, 知識.   est100  some photos - 4 Health,  Knowledge  (non-profit , No Advertising) http://okok987654321.blogspot.tw/