Wind direction is the direction from which the
windis blowing. It is usually reported in cardinal directions or in azimuthdegrees.
There are a variety of instruments used to measure wind direction, such as the
windsockand wind vane. Both of these instruments work by moving to minimize air resistance. The way they are pointed by prevailing winds indicates the direction from which the wind is blowing.
Modern instruments, called electronic
anemometers measure wind direction in a similar fashion but contain electronics to translate directional data from the vane into formats which computers can interpret. Many of these instruments measure wind speedas well. Although you can measure the wind direction by observing too.
Yamartino methodfor calculating the standard deviation of wind direction
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wind direction — noun : the direction from which the wind blows * * * wind direction «wihnd», the direction from which the wind is blowing, indicated by a weathercock … Useful english dictionary
wind direction — The direction from which the wind is blowing, expressed as a number from 000° to 359°. The wind direction is often indicated by three arrows when plotted on charts and maps … Aviation dictionary
wind direction — way that the wind is blowing … English contemporary dictionary
Wind shear — Wind shear, sometimes referred to as windshear or wind gradient, is a difference in wind speed and direction over a relatively short distance in the atmosphere. Wind shear can be broken down into vertical and horizontal components, with… … Wikipedia
Wind speed — is the speed of wind, the movement of air or other gases in an atmosphere. It is a scalar quantity, the magnitude of the vector of motion.Wind speed has always meant the movement of air in an outside environment, but the speed of air movement… … Wikipedia
Wind barb — Wind Barbs are symbols used on weather maps [http://polar.ncep.noaa.gov/waves/latest run/wna ecg.anim.gif] to indicate the speed and direction of wind. A barb is comprised of a minimum of two straight lines, the longest of which indicates the… … Wikipedia
wind shear — /wind/ 1. the rate at which wind velocity changes from point to point in a given direction. 2. a condition, dangerous to aircraft, in which the speed or direction of the wind changes abruptly. Cf. microburst. [1940 45] * * * Rate of change of… … Universalium
wind rose — /wind/ 1. a map symbol showing, for a given locality or area, the frequency and strength of the wind from various directions. 2. a diagram showing the relation of wind direction to other weather conditions at a given location. [1590 1600] * * * ▪ … Universalium
wind indicator — /wind/ a large weather vane used at airports to indicate wind direction. * * * … Universalium
wind tee — ☆ wind tee n. a large T shaped weather vane placed on a landing field, as to show wind direction for aircraft … English World dictionary