What is the primary value of a Pilot Weather Report (PIREP) compared to other weather products?
Why →
PIREPs are firsthand observations from pilots who have recently flown through an area. The only source of actual in-flight conditions rather than modeled or forecast data. They report cloud bases and tops, turbulence intensity, icing encounters, and visibility. FAA requires ATC to solicit PIREPs when ceilings are below 5,000 feet or visibility is at or below 5 miles.The trap →
PIREPs are observations, not forecasts, and have no legal binding force. They don't replace a standard weather briefing. Their value is specifically the real-time, firsthand nature of the data.SOURCE → FAA Aviation Weather Services / PHAK Chapter 13CHECKED APR 21ACS III.A.K1MED