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Near the tornado's peak intensity, they recorded a wind speed of 115–120 meters per second (260–270 miles per hour; 410–430 kilometers per hour). Though the portable radar had the uncertainty of ±5–10 metres per second (11–22 mph; 18–36 km/h), this reading was probably within the F5 range, confirming that tornadoes were capable of ...
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.
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.
271 mph (436 km/h) A Doppler on Wheels observed the entire lifecycle of an EF2 tornado in Goshen County, Wyoming. The radar also observed a peak wind speed of 271 mph (436 km/h) at 15–20 m (49–66 ft) above the ground level. [45] F4 May 30, 1998: Spencer, South Dakota: 234 mph (377 km/h) 266 mph (428 km/h) 264 mph (425 km/h)
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. [119]
For comparison, the strongest detected winds in a United States tornado (during the 1999 Oklahoma tornado outbreak) would be T11 using the following formulas: v = 2.365 (T+4) 3/2 m/s v = 8.511 (T+4) 3/2 km/h v = 5.289 (T+4) 3/2 mph v = 4.596 (T+4) 3/2 kn. where v is wind speed and T is TORRO intensity number. Wind speed is defined as a 3-second ...
New mobile radar data shows that wind speeds in the recent Greenfield tornado passed 300 mph. Scientists say it's rare.
Degree of Damage (DoD) / Measured IF# Speed: One Second Measurement: mph: km/h: m/s: DoD 0 / IF0: 44.1–58: 71–95: ... Wind engineering; Lists of tornadoes and ...