The Enhanced Fujita Scale (EF Scale)
   Go to [44]http://www.wdtb.noaa.gov/courses/EF-scale/index.html for
   more information regarding EF-Scale training by the WDTB.
   To view the Enhanced Fujita Scale Document, go to
   Dr. T. Theodore Fujita first introduced The Fujita Scale in the SMRP
   of the F-Scale. He wanted something that categorized each tornado by
   intensity and area. The scale was divided into six categories:
   Dr. Fujita's goals in his research in developing the F-Scale were
   Dr. Fujita and his staff showed the value of the scale's application
   The F-Scale then became the mainstay to define every tornado that has
   occurred in the United States. The F-Scale also became the heart of
   F-Scale, it was the Jarrell, TX tornado of May 27, 1997 and the
   the F-Scale. Meteorologists, Emergency Managers and Engineers convened
   The Fujita Scale
   The Fujita Scale is a well known scale that uses damage caused by a
   height of a damaged structure. Fujita's scale was designed to connect
   smoothly the Beaufort Scale (B) with the speed of sound atmospheric
   scale, or Mach speed (M). Fujita explains explicitly that "F-scale
   [48]Fujita Scale Table 
   Figure 2: Fujita's smoothly derived relationship of the F-Scale with
   the Beaufort Scale and the Mach Scale as explained to the right.
   The Beaufort Scale is defined by the Glossary of of Meteorology (AMS)
   (calm) to 12 (hurricane). The Mach scale is the speed of sound in the
   the F-Scale [49]http://www.spc.noaa.gov/faq/tornado/f-scale.html.
   Over the years, the F-Scale has revealed the following weaknesses:
       F-scale should be assigned?
   And the F-Scale has had its misuses over the years:
     * Judge the F-scale by the appearance of the tornado cloud
   Tornado Scale to include an estimate of f-scale damage then selecting
   the F-scale as a combination of f-scales and types of structural
   [50]Modified Fujita Scale 
   Figure 3: The "Modified" Fujita Scale. (click image to enlarge)
   The Enhanced Fujita Scale
   When the committee met to develop the Enhanced Fujita Scale (see
   there must be some conformity to that of the F-Scale that is listed in
   When using the EF-Scale to determine the tornado's EF-rating, begin
   152 mph. Now, taking this number to the [52]EF-Scale, the damage would
  44. http://www.wdtb.noaa.gov/courses/EF-scale/index.html
  45. http://www.spc.noaa.gov/cgi-bin-spc/redir.pl?url=http://www.wind.ttu.edu/EFScale.pdf&title=Enhanced+Fujita+Scale+Document
  49. http://www.spc.noaa.gov/faq/tornado/f-scale.html
  51. http://www.spc.noaa.gov/efscale/ef-scale.html
  52. http://www.spc.noaa.gov/efscale/ef-scale.html
  72. http://www.spc.noaa.gov/faq/tornado/f-scale.html