Which Way is the Winding Blowing?

By defintion the weather is "the state of the atmosphere at a given time and place, with respect to variables such as temperature, moisture, wind velocity, and barometric pressure." And to measure the weather; many inventions have been created specifically for keeping track and predicting atomospheric conditions. For example: wind velocity or speed and direction is measured by an anemometer, thermometers measure temperature by using materials that change in some way when they are heated or cooled, and a barometer is an instrument for measuring atmospheric pressure. Photo: NASA