Easterlies – Definition


Usually applied to the broad patterns of persistent winds with an easterly component, such as the easterly trade winds.


Air that flows in relation to the earth’s surface, generally horizontally. There are four areas of wind that are measured: direction, speed, character (gusts and squalls), and shifts. Surface winds are measured by wind vanes and anemometers, while upper level winds are detected through pilot balloons or aircraft reports.