What does "AUTO" signify in a weather report?

In the context of weather reporting, "AUTO" signifies an automatic weather observation. This designation indicates that the weather report was generated by automated equipment without human intervention. Automatic weather stations are equipped with sensors that continuously monitor various weather parameters such as temperature, humidity, wind speed, and precipitation. These observations help provide real-time weather data essential for various applications, including aviation, without the delays associated with manual reporting.

This is crucial for pilots and operators of unmanned aircraft, as they rely on timely and accurate weather information to make informed decisions regarding flight operations. By understanding what "AUTO" means in a weather report, a pilot can quickly assess whether they are viewing data gathered automatically, which may be beneficial for safety and operational efficiency.