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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 ...
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 ...
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.
The DOW documented the largest-ever-observed core flow circulation with a distance of 1,600 m (5,200 ft) between peak velocities on either side of the tornado, and a roughly 7 km (4.3 mi) width of peak wind gusts exceeding 43 m/s (96 mph), making the Mulhall tornado the largest tornado ever measured quantitatively. [3] 1946 Timber Lake tornado
A house was lifted off its foundation and disintegrated, and steel rods at a construction site were bent down to the ground. Video analysis indicated wind speeds of 93 m/s (208 mph; 335 km/h) at 120 metres (390 ft) above ground level. [27] Fujita's analysis would make this the first record of an F4 tornado in Japan. [28] Fujita: Jan 18 2007 Germany
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.
New mobile radar data shows that wind speeds in the recent Greenfield tornado passed 300 mph. Scientists say it's rare.
The tornado was rated as a mid-range EF4 with wind speeds estimated at 185 mph (298 km/h), reaching a peak width of 1,300 yards (1,200 m) along an 42.38-mile (68.20 km) path, remaining on the ground for 48 minutes.