Fastest wind speed (Doppler radar)

Scientists from the University of Oklahoma using a "Doppler on Wheels" mobile weather observatory logged an estimated wind speed of 486 +/-32 km/h (302 +/- 20 mph) associated with a large tornado near Bridge Creek, Oklahoma, USA, on 3 May 1999.

The previous record was measured using a portable 3-mm Doppler radar, which registered an estimated 460-km/h (286-mph) wind speed associated with a tornado near Red Rock, Oklahoma, USA, on 26 April 1991. For both speeds, the measurement was taken about 100-200 ft above the ground. The ground speed is not exactly known.

The fastest wind speed measured by an anemometer is 408 km/h (253 mph), recorded at Barrow Island, off Australia, during Tropical Cyclone Olivia on 10 April 1996. This is the fastest wind speed ever recorded on Earth that was not associated with a tornado. An automatic weather station on Barrow Island, Australia, registered a maximum gust of 408 km/h (220 kn; 253 mph; 113 m/s); this was evaluated by the World Meteorological Organization, who found that the anemometer was mechanically sound and the gust was within statistical probability and ratified the measurement in 2010. The anemometer was mounted 10 m (33 ft) above ground level.