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Tornado intensity is the measure of wind speeds and potential risk produced by a tornado. Intensity can be measured by in situ or remote sensing measurements, but since these are impractical for wide-scale use, intensity is usually inferred by proxies , such as damage.
The highest wind speed ever measured in a tornado, which is also the highest wind speed ever recorded on the planet, is 301 ± 20 mph (484 ± 32 km/h) in the F5 Bridge Creek-Moore, Oklahoma, tornado which killed 36 people. [120] The reading was taken about 100 feet (30 m) above the ground. [3]
The old scale lists an F5 tornado as wind speeds of 261–318 mph (420–512 km/h), while the new scale lists an EF5 as a tornado with winds above 200 mph (322 km/h), found to be sufficient to cause the damage previously ascribed to the F5 range of wind speeds.
Straight-line wind damage: A fast-moving squall line of severe thunderstorms can produce straight-line winds on the order of those estimated with EF0 or, in rarer cases, EF1 tornadoes. Downed ...
The storm was driving maximum sustained winds of 85 mph and moving north at 9 mph. Tornadoes were possible late Wednesday on the western Florida Peninsula and southern Alabama, the hurricane ...
A tornado is seen West of Dodge City, Kansas moving North on May 24, 2016 in Dodge City, Kansas. Tornadoes are "violently rotating columns of air" in contact with the ground, according to NWS .
Frame-home structural damage cannot exceed total destruction and debris dispersal, which constitutes F5 damage. A tornado with wind speeds greater than 319 miles per hour (513 km/h) is possible, as the 1999 Bridge Creek-Moore Tornado did have 321 mph (517 km/h) winds, but that measurement was not near ground level.
The tornado that touched down in Urbandale was from a storm that was part of a forming derecho — a fast-moving line of thunderstorms that can produce high winds. It moved more quickly than the ...