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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 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 ...
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 F5 tornado was estimated to be about a mile wide and had winds over 300 mph. It traveled at a record speed of 73 mph and destroyed more than 19 communities, including over 15,000 homes.
The extraordinary damage and high recorded wind speeds leads researchers and storm chasers alike to attest that the Kellerville tornado had attained F5 strength. [ 43 ] [ 44 ] The same supercell responsible for the Kellerville tornado cycled and formed a violent tornado to the west of Allison, Texas .
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.
On May 3, 1999, an F5 tornado struck Bridge Creek and Moore, Oklahoma, with winds of over 300 mph - the highest wind speed ever recorded on Earth. Nearly 600 people were injured, and 36 were ...
The 1999 Bridge Creek–Moore tornado was a large, long-lived and exceptionally powerful F5 tornado in which the highest wind speed ever measured globally was recorded at 321 miles per hour (517 km/h) by a Doppler on Wheels (DOW) radar.