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A tropical depression or tropical low is a disturbance with a defined circulation, where the central position can be estimated, and the maximum 10-minute average wind speed is less than 34 kn (39 mph; 63 km/h) near the centre. [28]
Although the scale shows wind speeds in continuous speed ranges, the US National Hurricane Center and the Central Pacific Hurricane Center assign tropical cyclone intensities in 5-knot (kn) increments (e.g., 100, 105, 110, 115 kn, etc.) because of the inherent uncertainty in estimating the strength of tropical cyclones. Wind speeds in knots are ...
Wind speed on the Beaufort scale is based on the empirical relationship: [6] v = 0.836 B 3/2 m/s; v = 1.625 B 3/2 knots (=) where v is the equivalent wind speed at 10 metres above the sea surface and B is Beaufort scale number.
An anemometer is commonly used to measure wind speed. Global distribution of wind speed at 10m above ground averaged over the years 1981–2010 from the CHELSA-BIOCLIM+ data set [1] In meteorology, wind speed, or wind flow speed, is a fundamental atmospheric quantity caused by air moving from high to low pressure, usually due to changes in ...
This lists the fastest wind speed of a tropical cyclone per basin since 1950 (NOTE: All wind speeds are 1-minute sustained and are in mph). North Atlantic: 190 mph (1980) East Pacific: 215 mph (2015) Central Pacific: 175 mph (1994) West Pacific: 215 mph (1961) North Indian: 175 mph (2019) South Indian: 165 mph (1994) Australia: 180 mph (2006)
In the United States Charles Bush developed the first wind turbine in Ohio a year later. [3] Global Annual 50m Average Wind Speed wind atlas. The first well-known wind atlas was the European Wind Atlas, published in 1989. Russia published a wind atlas in 2000, followed by Egypt in 2006.
Category 4 hurricanes have maximum sustained winds of 113–136 knots (130–156 mph, 209–251 km/h). [1] " Sustained winds" refers to the average wind speed observed over one minute at a height of 10 meters (33 ft) above ground.
The HDP index is calculated by squaring the estimated maximum sustained wind speeds for tropical cyclones while at hurricane strength, that is, wind speeds of at least 64 knots (≥ 119 km/h; 74 mph). [4] The squared windspeeds from six-hourly recorded intervals are then summed across an entire season.
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