The act or process of ascertaining the force or velocity of the wind.

measuring wind speed and direction

The study of measuring and recording the direction and speed (or force) of the wind, including its vertical component. Systematic records of wind direction as indicated by wind vanes were begun in Italy in 1650 and in England in 1667. The speed of the wind was first observed by noting the rate at which light substances are carried along by the air; it is now determined by means of anemometers.