What specific weather conditions would not be included in the TEMPO group of a TAF?

The TEMPO group in a Terminal Aerodrome Forecast (TAF) represents temporary weather conditions that are expected to occur, which may last for a brief period within the forecast period. These conditions typically include fluctuations in phenomena like precipitation, visibility, and wind.

Regarding weather conditions that are not included in the TEMPO group, sustained significant weather conditions that persist for many hours are excluded. The focus of the TEMPO group is on short-lived conditions, while prolonged weather phenomena would be covered in the main body of the TAF.

Sunny skies, wind conditions, and cold weather alerts can all be addressed within forecasts, but they may not specifically fit within the temporary conditions captured by TEMPO. In contrast, a sustained condition, such as a long-lasting adverse weather effect, is deemed too permanent for inclusion in the ephemeral nature of the TEMPO group. This understanding is essential for pilots and flight planners when interpreting TAFs effectively for flight safety and operational planning.