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- Q429050 subject Q8506563.
- Q429050 subject Q8960210.
- Q429050 subject Q9870773.
- Q429050 abstract "The Enhanced Fujita scale (EF-Scale) rates the strength of tornadoes in the United States and Canada based on the damage they cause.Implemented in place of the Fujita scale introduced in 1971 by Tetsuya Theodore Fujita, it began operational use in the United States on February 1, 2007, followed by Canada on April 1, 2013. The scale has the same basic design as the original Fujita scale—six categories from zero to five, representing increasing degrees of damage. It was revised to reflect better examinations of tornado damage surveys, so as to align wind speeds more closely with associated storm damage. Better standardizing and elucidating what was previously subjective and ambiguous, it also adds more types of structures and vegetation, expands degrees of damage, and better accounts for variables such as differences in construction quality.The new scale was publicly unveiled by the National Weather Service at a conference of the American Meteorological Society in Atlanta on February 2, 2006. It was developed from 2000 to 2004 by the Fujita Scale Enhancement Project of the Wind Science and Engineering Research Center at Texas Tech University, which brought together dozens of expert meteorologists and civil engineers in addition to its own resources.As with the Fujita scale, the Enhanced Fujita scale remains a damage scale and only a proxy for actual wind speeds. While the wind speeds associated with the damage listed have not undergone empirical analysis (such as detailed physical or any numerical modelling) owing to excessive cost, the wind speeds were obtained through a process of expert elicitation based on various engineering studies since the 1970s as well as from field experience of meteorologists and engineers. In addition to damage to structures and vegetation, radar data, photogrammetry, and cycloidal marks (ground swirl patterns) may be utilized when available.The scale was used for the first time in the United States a year after its public announcement when parts of central Florida were struck by multiple tornadoes, the strongest of which were rated at EF3 on the new scale. It was used for the first time in Canada shortly after its implementation there when a tornado developed near the town on Shelburne, Ontario on April 18, 2013, causing up to EF1 damage.".
- Q429050 thumbnail EF0_tornado_damage_example_(1).jpg?width=300.
- Q429050 wikiPageExternalLink fujita.html.
- Q429050 wikiPageExternalLink efscale.
- Q429050 wikiPageExternalLink program_149.htm.
- Q429050 wikiPageExternalLink FinalNWSF-scaleAssessmentGuide.pdf.
- Q429050 wikiPageExternalLink EF-scale.
- Q429050 wikiPageExternalLink F_Scale.
- Q429050 wikiPageExternalLink fema342.shtm.
- Q429050 wikiPageExternalLink s2573.htm.
- Q429050 wikiPageExternalLink sr146.pdf.
- Q429050 wikiPageExternalLink sr147.pdf.
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- Q429050 wikiPageWikiLink Q8081.
- Q429050 wikiPageWikiLink Q8506563.
- Q429050 wikiPageWikiLink Q8960210.
- Q429050 wikiPageWikiLink Q939225.
- Q429050 wikiPageWikiLink Q967509.
- Q429050 wikiPageWikiLink Q9870773.
- Q429050 comment "The Enhanced Fujita scale (EF-Scale) rates the strength of tornadoes in the United States and Canada based on the damage they cause.Implemented in place of the Fujita scale introduced in 1971 by Tetsuya Theodore Fujita, it began operational use in the United States on February 1, 2007, followed by Canada on April 1, 2013. The scale has the same basic design as the original Fujita scale—six categories from zero to five, representing increasing degrees of damage.".
- Q429050 label "Enhanced Fujita scale".
- Q429050 depiction EF0_tornado_damage_example_(1).jpg.