The Automated Tropical Cyclone Forecasting System (ATCF) is a piece of software originally developed to run on a personal computer for the Joint Typhoon Warning Center (JTWC) in 1988, and the National Hurricane Center (NHC) in 1990. ATCF remains the main piece of forecasting software used for the United States Government, including the JTWC, NHC, and Central Pacific Hurricane Center. Other tropical cyclone centers in Australia and Canada developed similar software in the 1990s. The data files with ATCF lie within three decks, known as the a-, b-, and f-decks. The a-decks include forecast information, the b-decks contain a history of center fixes at synoptic hours, and the f-decks include the various fixes made by various analysis center at various times. In the years since its introduction, it has been adapted to Unix and Linux platforms.
"}{"type":"standard","title":"2011 Joplin tornado","displaytitle":"2011 Joplin tornado","namespace":{"id":0,"text":""},"wikibase_item":"Q2215044","titles":{"canonical":"2011_Joplin_tornado","normalized":"2011 Joplin tornado","display":"2011 Joplin tornado"},"pageid":31862312,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/en/thumb/a/aa/Photograph_of_the_2011_Joplin_tornado.jpeg/330px-Photograph_of_the_2011_Joplin_tornado.jpeg","width":320,"height":219},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/en/a/aa/Photograph_of_the_2011_Joplin_tornado.jpeg","width":382,"height":261},"lang":"en","dir":"ltr","revision":"1285987450","tid":"80f8a070-1b25-11f0-b91a-233eefa4023a","timestamp":"2025-04-17T00:47:14Z","description":"Deadly EF5 tornado in Missouri, US","description_source":"local","coordinates":{"lat":37.06055556,"lon":-94.53083333},"content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/2011_Joplin_tornado","revisions":"https://en.wikipedia.org/wiki/2011_Joplin_tornado?action=history","edit":"https://en.wikipedia.org/wiki/2011_Joplin_tornado?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:2011_Joplin_tornado"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/2011_Joplin_tornado","revisions":"https://en.m.wikipedia.org/wiki/Special:History/2011_Joplin_tornado","edit":"https://en.m.wikipedia.org/wiki/2011_Joplin_tornado?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:2011_Joplin_tornado"}},"extract":"The 2011 Joplin tornado, also referred to as simply the Joplin EF5, was a large, deadly and devastating EF5 tornado that struck the city of Joplin, Missouri, United States during the evening hours of Sunday, May 22, 2011, causing catastrophic damage to it and the surrounding regions. As part of a larger late-May sequence of tornadic activity, the extremely violent tornado began just west of Joplin at about 5:34 p.m. CDT (UTC–05:00) and quickly reached a peak width of nearly 1 mile (1.6 km) as it tracked through the southern part of the city, before later impacting rural Jasper and Newton counties and dissipating after 48 minutes on the ground at 6:12 p.m. CDT (UTC–05:00). The tornado was on the ground for a total of 21.62 miles (34.79 km).","extract_html":"
The 2011 Joplin tornado, also referred to as simply the Joplin EF5, was a large, deadly and devastating EF5 tornado that struck the city of Joplin, Missouri, United States during the evening hours of Sunday, May 22, 2011, causing catastrophic damage to it and the surrounding regions. As part of a larger late-May sequence of tornadic activity, the extremely violent tornado began just west of Joplin at about 5:34 p.m. CDT (UTC–05:00) and quickly reached a peak width of nearly 1 mile (1.6 km) as it tracked through the southern part of the city, before later impacting rural Jasper and Newton counties and dissipating after 48 minutes on the ground at 6:12 p.m. CDT (UTC–05:00). The tornado was on the ground for a total of 21.62 miles (34.79 km).
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