What is Fujita?
Fujita scale (F-scale), also known as Fujita-Pearson scale, is a scale used to assign the intensity evaluation to tornadoes. The assessment of the assigned tornado is based on the amount of tornado damage that tornado causes vegetation, landscape and artificial structures. In 1971, Tetsuya Theodore "Ted" Fujita of the University of Chicago, in cooperation with Allen Pearson, first introduced a scale. At that time, Pearson was the head of the national forecast for the Storms forecast, the predecessor of the Storm prediction center, in Kansas City, Missouri.
After a tornado, engineers and meteorologists, the official assessment of Fujita after visual surveys of the area will assign a cyclone. These surveys are carried out according to land and/or soil, depending on circumstances and availability. Tornadoes can also be used to determine the patterns of ground swirling called "cycloid signs". Eyewitness accounts, media reports and recordings and radio monitoring can also be used in the Neboder to exactly evaluate the tornado. Rating
usingFujita-Pearson scales have been retroactively applied to tornadoes reported since 1950 forward. This rating assignment was included in the National Oceanic and Atmospheric Administration (NOAA). The evaluation was also applied to numerous strong, infamous tornadoes that occurred before 1950.
Improved Fujita scale officially replaced the original Fujita scale in the United States in 2007 using EF0 evaluation via EF5 rather than F0 via F5. In short, F0/EF0 indicates damage to light; F1/EF1 indicates slight damage; F2/EF2 indicates considerable damage; F3/EF3 indicates serious damage; F4/EF4 indicates devastating damage and F5/EF5 indicates incredible damage. Neither Fujita nor improved scale Fujita is a scale of wind speed or wind, but the scale of damage, although levels with the levels of SV each correlation with a series of wind speed. LiftThe epic scale Fujita arose as a result of research that indicated wind speeds for a stronger tornado on the original Fujita scale, to a large extent they were overrated to a large extent.
Improved scale Fujita takes into account the quality of the building. It also standardizes different types of structures. In addition, both systems are basically the same. According to the National Meteorological Service (NWS) in the United States, there are no plans to re -evaluate past tornadoes using an improved Fujita scale, and it is unlikely that a higher percentage of future cyclones will receive the level of "5" rating for the switch.
Improved scale Fujita, as well as its predecessor, which is still used in parts of a world other than the United States, is still a measure of damage that uses wind speed estimates. The new scale was used in the United States for the first time a year after the announcement of February 2006, and Was applied to a tornado rash that torn the middle Florida. The strongest rating on the improved scale Fujita, EF5, wasFor the first time the devastating tornado, which in May 2007 flattened the small town of Greensburg in Kansas.