The term 'TEMPO' in TAFs indicates changes are likely to occur in what time frame?

The term 'TEMPO' in Terminal Aerodrome Forecasts (TAFs) refers to expected temporary fluctuations in weather conditions that are likely to occur within a specified time frame, usually indicating that changes will happen within a one-hour period. This reflects the nature of 'TEMPO' as it signifies short-lived changes in the weather that may affect flight operations, advising pilots and air traffic controllers of potential variations in weather, such as brief showers, changes in visibility, or variations in wind speed and direction.

This is an important tool in aviation meteorology as it helps pilots prepare for and manage rapidly changing weather conditions without suggesting a long-term or persistent weather impact, which would not align with the definition of 'TEMPO'. Understanding this time frame helps ensure safety and preparedness for immediate, though temporary, changes during flight operations.