What two measurements does an Automated Weather Observing System (AWOS) typically provide?

An Automated Weather Observing System (AWOS) is designed to provide real-time weather data to support aviation operations. One of its primary functions is to supply critical atmospheric information that is essential for pilots before takeoff and during flight.

Barometric pressure is a fundamental meteorological measurement; it helps determine altitude, as changes in pressure can signify changes in elevation. Consequently, the altimeter setting, a derivative of barometric pressure, enables pilots to gauge their altitude accurately when flying. Together, these two measurements contribute significantly to safe and efficient flight operations, assisting pilots in maintaining the correct altitude and ensuring proper navigation.

Other options like temperature and wind speed, humidity and visibility, or wind direction and precipitation levels, while important, do not fully encapsulate the primary functions of an AWOS in terms of critical altitudinal information, which is why they do not represent the core measurements provided by AWOS.