When should controllers solicit Pilot Reports (PIREPs)?

Controllers should solicit Pilot Reports (PIREPs) primarily during thunderstorms and under specific conditions such as icing and turbulence because these reports provide real-time, crucial information about significant weather phenomena. PIREPs are invaluable in improving situational awareness for other aircraft and can influence operational decisions, such as adjusting flight paths or altitudes to enhance safety.

During thunderstorms, pilots can offer insights on the intensity of the storm, wind shear, and turbulence, which may not be fully captured by ground-based weather systems. Similarly, reports of icing conditions help inform other pilots in the vicinity, enabling them to take necessary precautions.

While other conditions, such as ceilings above 5000 feet or visibility greater than 5 miles, are important for flight safety, they do not necessarily warrant the immediate collection of PIREPs to the same extent as critical weather phenomena like thunderstorms, turbulence, and icing. Additionally, severe weather warnings may alert controllers to potential hazards, but soliciting PIREPs during all severe weather events may not provide the specific, actionable information that is most valuable during especially hazardous conditions.