Definition
Terminal Aerodrome Forecast (TAFs) is an aviation weather forecast specifically issued for an airport or aerodrome. It predicts expected weather conditions—such as wind, visibility, clouds, and significant weather events—within a defined radius (typically 5 statute miles) over a forecast period of 24–30 hours.
Usage
Pilots, drone operators, and air traffic personnel rely on TAFs to plan flights with awareness of upcoming weather changes. TAFs provide structured, time-segmented forecasts that help determine whether conditions will remain safe and compliant for flight operations.
Relevance to the Industry
For drones, especially BVLOS, advanced, or commercial operations, TAFs play a critical role in pre-flight risk assessment and mission planning. Weather can change rapidly, and TAFs highlight expected shifts that may affect:
• Wind limits and gusts
• Visibility fluctuations
• Cloud ceiling changes
• Thunderstorms or precipitation
• Operational go/no-go decisions
TAFs help remote pilots anticipate conditions beyond the immediate METAR snapshot, improving safety and regulatory compliance.
How Does a TAFs (Terminal Aerodrome Forecast) Work?
A TAF consists of coded segments that describe expected aviation weather over time. Each new line—introduced with FM, TEMPO, or PROB—indicates a change or probability of new conditions.
• FM: Rapid, lasting change
• TEMPO: Temporary conditions expected
• PROB: Probability of a specific condition occurring
The TAF updates several times per day and gives operators a future-focused weather outlook essential for mission planning.
Example in Use
A drone operator planning a construction mapping mission sees that a TAF predicts increasing winds with gusts above the aircraft’s limits starting at 1500Z. The pilot adjusts the schedule to fly earlier in the day to ensure safe performance.
Frequently Asked Questions About TAFs (Terminal Aerodrome Forecast)
How is a TAF different from a METAR?
A METAR describes current weather; a TAF predicts future weather.
Do all aerodromes issue TAFs?
No. Only designated airports with certified forecasting capability produce official TAFs.
How often are TAFs updated?
Typically four times daily, though updates may occur more frequently in changing conditions.
Related acronyms in use.
