Detailed weather conditions at airports are easy to obtain through a metar, ATIS, AWOS or ASOS. Conditions such as winds, temperatures, cloud conditions and visibilities are measured by ground-based equipment and can be obtained through frequencies, phone numbers, iPad apps and some panel-mounted avionics. But weather conditions are harder to measure in the air. That’s where you come in. Pireps provide pilots with the most accurate weather information and can help others make a go/no-go decision.