Fscale

Fscale, also known as the Fujita Scale, is a standardized system used to classify the intensity of tornadoes based on the damage they cause to structures and vegetation. Developed by Dr. Tetsuya Fujita in 1971, the scale provides a methodology for estimating tornado strength through damage assessment rather than direct measurement of wind speeds.

The Fscale categorizes tornadoes into six levels, ranging from F0 to F5. F0 tornadoes are weak, causing light damage, such as broken branches or shallow-rooted trees. F1 tornadoes produce moderate damage, including roof damage and broken windows. F2 tornadoes are considered significant, capable of tearing off roofs and overturning mobile homes. F3 tornadoes cause severe damage, with large trees snapped or uprooted and moderate to severe structural damage. F4 tornadoes are devastating, capable of destroying entire communities with well-built structures leveled. F5 tornadoes represent the most extreme category, with the capacity to cause incredible destruction, such as the complete leveling of well-constructed buildings and widespread destruction.

The Fscale is primarily based on post-storm surveys, observing the extent and type of damage caused to various structures and natural features. While it has been widely used in the United States, the scale has limitations due to its reliance on damage assessment, which can vary based on construction quality and other factors. As a result, the Enhanced Fujita Scale (EF Scale) was introduced in 2007 to improve accuracy by considering different construction standards.

Overall, the Fscale provides a useful framework for understanding tornado severity, aiding in both scientific analysis and emergency response efforts.