What does the acronym PIREP stand for?

The acronym PIREP stands for Pilot Report, which is a report submitted by pilots regarding the actual weather conditions they encounter during flight. This information is crucial for other pilots, air traffic control, and meteorologists as it provides real-time updates on conditions such as turbulence, icing, visibility, and cloud cover. PIREPs are collected and shared to enhance overall situational awareness and safety in aviation by reflecting the experiences of pilots in the air, thus assisting with the formulation of more accurate weather forecasts and updates.

The other options do not accurately represent the purpose or nature of a PIREP. A Public Incident Report pertains to documentation of specific in-flight issues but does not capture the broader scope of weather observations. A Post-Flight Report focuses on the aircraft's performance after a flight, while a Private Flight Report lacks relevance in this context, as it does not provide insights into weather conditions experienced during flight.