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2. Wind speed - Wikipedia

   en.wikipedia.org/wiki/Wind_speed

   In Canada, reference wind pressures are used in design and are based on the "mean hourly" wind speed having a probability of being exceeded per year of 1 in 50. The reference wind pressure q is calculated using the equation q = ρv 2 / 2 , where ρ is the air density and v is the wind speed.

3. Beaufort scale - Wikipedia

   en.wikipedia.org/wiki/Beaufort_scale

   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.

4. Anemometer - Wikipedia

   en.wikipedia.org/wiki/Anemometer

   The air flow past the cups in any horizontal direction turned the shaft at a rate roughly proportional to the wind's speed. Therefore, counting the shaft's revolutions over a set time interval produced a value proportional to the average wind speed for a wide range of speeds. This type of instrument is also called a rotational anemometer.

5. Roughness length - Wikipedia

   en.wikipedia.org/wiki/Roughness_length

   Roughness length is a parameter of some vertical wind profile equations that model the horizontal mean wind speed near the ground. In the log wind profile, it is equivalent to the height at which the wind speed theoretically becomes zero in the absence of wind-slowing obstacles and under neutral conditions. In reality, the wind at this height ...

6. Wind profile power law - Wikipedia

   en.wikipedia.org/wiki/Wind_profile_power_law

   The wind profile power law relationship is = where is the wind speed (in metres per second) at height (in metres), and is the known wind speed at a reference height .The exponent is an empirically derived coefficient that varies dependent upon the stability of the atmosphere.

7. METAR - Wikipedia

   en.wikipedia.org/wiki/METAR

   Immediately after the wind direction is the wind speed, coded in two or three digits measured in knots, km/h or m/s. If during past 10 minutes, the weather station detects more than 10 kn (19 km/h; 12 mph) between minimum and maximum windspeed, METAR determines a wind gust exists and reports the maximum instantaneous windspeed.