Which segment of a TAF would indicate temporary conditions expected?

The segment of a TAF (Terminal Aerodrome Forecast) that indicates temporary conditions expected is the "TEMPO" section. Within a TAF, the "TEMPO" qualifier is specifically used to denote significant weather changes that are expected to occur at the aerodrome but only for a limited duration, typically lasting less than an hour, and not exceeding one-third of the forecast period.

This is crucial for pilots as it highlights weather conditions that could affect flight operations temporarily. The inclusion of "TEMPO" alerts pilots to be particularly vigilant about these short-lived phenomena during their flight planning and execution.

In contrast, while "BECMG" indicates conditions that are expected to change gradually over time, "FM" denotes a specific time frame when conditions are expected to begin, and "PROB" indicates a probability of a certain weather event occurring, it doesn’t specifically denote temporary conditions.