What does the acronym "PIREP" stand for?

The acronym "PIREP" stands for "Pilot Report." This term refers to reports provided by pilots during flight that give real-time information about weather conditions, turbulence, and other significant occurrences encountered in the air. These reports are valuable for weather forecasting and contribute to the overall safety and effectiveness of flight operations.

Pilot Reports are vital for sharing firsthand data, which can help other pilots in the area make informed decisions about their own flights and navigate potential hazards. The insights shared in PIREPs can include details about cloud conditions, visibility, wind shear, and icing, among other critical meteorological factors.

In contrast, other options like Pre-flight Information Report, Pilot Intentions Report, and Performance Indicator Report are not standardized or widely recognized terms in aviation meteorology. Thus, they do not accurately represent the concept referred to by PIREP, which is distinctly known for its focus on pilot observations in flight.