Different wind speeds may cause similar-looking damage from place to place -- even from building to building. Without a thorough engineering analysis of tornado damage in any event, the actual wind speeds needed to cause that damage are unknown.
www.spc.noaa.gov/faq/tornado/f-scale.html www.spc.noaa.gov/faq/tornado/f-scale.html
The idea is that a "one size fits all" approach just doesn't work in rating tornado damage, and that a tornado scale needs to take into account the typical strengths and weaknesses of different types of construction.
www.spc.noaa.gov/faq/tornado/ www.spc.noaa.gov/faq/tornado/
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NOAA NWS, FEMA, and American Red Cross tornado safety and tornado preparedness guide ... MYTH: Windows should be opened before a tornado approaches to equalize pressure and minimize damage. FACT: Opening windows allows damaging winds to enter the structure. Leave the windows alone; instead, immediately go to a safe place.
www.nssl.noaa.gov/NWSTornado/ www.nssl.noaa.gov/NWSTornado/
The Fujita Tornado Intensity Scale is used to rate the intensity of a tornado by examining the damage caused by the tornado after it has passed over a man-made structure ... Such a chart became possible only after the acceptance of the Fujita Scale as the official classification system for tornado damage. It is quite...
www.tornadoproject.com/fscale/fscale.htm www.tornadoproject.com/fscale/fscale.htm
The Tornado Project is a small company that researches, compiles and makes tornado information available to tornado and severe weather enthusiasts, the public, the meteorological community and emergency management officials in the form of tornado videos, tornado books, and tornado posters. ... NWS damage photographs are here.;
www.tornadoproject.com/ www.tornadoproject.com/
But experts have no similar way to judge a tornado's force before or during its touchdown, as tornadoes arise too quickly and are too dangerous to approach by airplane. Instead, after a tornado hits, the U.S. National Weather Service uses a rating system it adopted in 1973 called the Fujita Scale.
www.pbs.org/wgbh/nova/tornado/damage.html www.pbs.org/wgbh/nova/tornado/damage.html
May 4, 1999: This mobile home park received extreme damage, but the tornado that hit it would not have caused as much damage to sturdier homes. ... Rate Tornado Damage; Assess the level of destruction left in the wake of actual tornadoes.
www.pbs.org/wgbh/nova/tornado/dama-nf.html www.pbs.org/wgbh/nova/tornado/dama-nf.html
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