Without a thorough engineering analysis of tornado damage in any event, the actual wind speeds needed to cause that damage are unknown. The Enhanced F-scale was implemented in February 2007.

The Fujita scale (F-Scale; / fuˈdʒiːtə /), or Fujita–Pearson scale (FPP scale), is a scale for rating tornado intensity, based primarily on the damage tornadoes inflict on human-built structures and vegetation.

2025年1月10日 · Gale tornado: 40-72 mph: Some damage to chimneys; breaks branches off trees; pushes over shallow-rooted trees; damages sign boards. F1: Moderate tornado: 73-112 mph: The lower limit is the beginning of hurricane wind speed; peels surface off roofs; mobile homes pushed off foundations or overturned; moving autos pushed off the roads; attached ...

The Enhanced Fujita scale (abbreviated as EF-Scale) is a scale that rates tornado intensity based on the severity of the damage they cause. It is used in some countries, including the United States and France. [1] The EF scale is also unofficially used in …

An F1 tornado has a rating classification of Weak. The F1 rating was replaced by EF1 under the new Enhanced Fujita Scale. From 1970 to 2002, F1 tornados account for 36% of all tornados occurence in the United States. In the 1970s, there was more damage caused by F1 tornadoes than by other Fujita categories

Fujita Damage Intensity Scale. F0 - F1 Weak Tornado; F2 - F3 Strong Tornado; F4 - F5 Violent Tornado

The Fujita Tornado Scale, usually referred to as the F-Scale, classifies tornadoes based on the resulting damage. This scale was developed by Dr. T. Theodore Fujita (University of Chicago) in 1971. MINIMAL DAMAGE: Some damage to chimneys, TV …

When using the EF-Scale to determine the tornado's EF-rating, begin with the 28 Damage Indicators. Each one of these indicators have a description of the typical construction for that category of indicator.

The original Fujita Scale and the new Enhanced Fujita 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. The "Percentage of All Tornadoes 1950-2011" pie chart reveals that the vast majority of tornadoes are either weak or do damage that can only be ...

Enhanced F Scale for Tornado Damage. An update to the the original F-scale by a team of meteorologists and wind engineers, implemented in the U.S. on 1 February 2007.