Which weather conditions should a pilot report in a PIREP?

The correct choice emphasizes the importance of reporting conditions that may significantly impact flight safety. Carburetor ice is a critical situation that can incapacitate an engine, and visibility less than 3 miles presents a serious hazard for pilots in flight, particularly during takeoff and landing phases. These elements influence both the immediate safety of flight operations and the decisions made by other pilots receiving the report.

The other conditions listed may be relevant in certain contexts, but they do not pose the same levels of risk. Strong winds and turbulence, although they can affect comfort and handling, don’t inherently indicate immediate safety concerns like carburetor ice or severely reduced visibility. Reporting fog and low visibility is certainly important, but the conditions outlined in the correct choice depict a scenario with direct implications for engine performance and navigation, which are paramount for flight safety.