How do tornadoes measured




















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We encourage you to use your own good judgment about what's appropriate for you and your property and always consider safety. Connect With Us. This is done for several structures not just one, before a final EF rating is determined.

Boren Blvd. Suite Norman, OK Comments? Please Contact Us. Please try another search. Multiple locations were found. Please select one of the following:. Location Help. Customize Your Weather. Privacy Policy. Current Hazards. Current Conditions. Rivers and Lakes. Climate and Past Weather. Some damage to chimneys; branches broken off trees, shallow-rooted trees uprooted, sign boards damaged.

One F1 Weak mph Moderate damage. Roof surfaces peeled off; mobile homes pushed foundations or overturned; moving autos pushed off road. Two F2 Strong mph Considerable damage.

EF0 tornadoes have gusts of wind mph. The physical size of a tornado has little to do with its intensity, and any tornado may change size as it travels. Based on records from , just under three-quarters of all tornadoes were in the F0-F1 range, and are considered very weak. As might be expected, most of the deaths, about two-thirds, are the result of tornadoes classed as violent. Four percent of deaths occur during weak tornadoes.



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