Meteorological information

Meteorological information is weather information relevant to a flight, such as observations, forecasts, wind, visibility, cloud, temperature and QNH. It is given before departure, by broadcast services such as ATIS or VOLMET, or directly by ATS on request or when needed. Pilots use it to plan the flight, choose routes and altitudes, and decide whether conditions remain within limits. When receiving it by radio, listen carefully, read back the parts that require repetition, and update your plan if the weather changes.