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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. None of the tornadoes in the United States recorded before February 1, 2007, were re ...
The new scale more accurately matches wind speeds to the severity of damage caused by the tornado. [8] Though each damage level is associated with a wind speed, the Fujita scale is effectively a damage scale, and the wind speeds associated with the damage listed are not rigorously verified.
Late-May 1998 tornado outbreak and derecho – DOW recorded maximum wind speeds at 264 mph (425 km/h) at 160 ft (49 m) above ground level, which the NWS classified at almost ground level. Such wind speeds would fall well into the EF5 range on the Enhanced Fujita Scale, though the maximum damage intensity observed in the town of Spencer was F4.
The Enhanced Fujita scale measures a tornado's intensity on a scale of 1 to 5 based on its wind speed estimates and resulting damages.
Wind speed of 261 mph (420 km/h) or 116 m/s in tornadoes observed by radar, organized by the highest confirmed wind speed. Official rating Date Location Minimum peak wind speed Maximum peak wind speed Highest confirmed peak wind speed F5 May 3, 1999: Bridge Creek, Oklahoma: 281 mph (452 km/h) 321 mph (517 km/h) 321 mph (517 km/h) [d]
Timmer also noted that estimated wind speeds inside the tornado reached about 160-170 mph. The full data was released online to help aid further research from the historic intercept.
In this version, the wind speed damage indicator was introduced, which made it the first tornado intensity and damage scale to use measured wind speeds and Doppler weather radar measured wind speeds. [3] When the first official publication of the IF scale, the 9-step rating scale was kept.
An EF1 tornado has wind speeds ranging from 86 to 100 mph. An EF2 tornado has wind speeds ranging from 111 to 135 mph, and winds of that force can cause some significant damage.