In what manner is wind direction expressed in a TAF?

In a TAF (Terminal Aerodrome Forecast), wind direction is expressed in degrees true north. This means that when reading the wind direction in a TAF, the values given indicate the angle from true north, which is a fixed geographic reference. For example, a wind direction of 270 degrees means the wind is blowing from the west.

This method provides a standardized way to interpret wind data, which is essential for flight planning and operations. Using true north eliminates potential confusion that could arise from magnetic variations, which can differ depending on the geographic area and can change over time. Thus, conveying wind direction in degrees true north ensures consistency and clarity in meteorological communication.

This clarity is particularly important for pilots and air traffic controllers, as it directly impacts flight safety and navigation. The other methods of expressing wind direction, such as magnetic north or cardinal directions, are less precise in this context and do not align with the conventions used in TAF reports.