What is the key purpose of a turbulence group in a TAF?

The key purpose of a turbulence group in a TAF (Terminal Aerodrome Forecast) is to forecast turbulence. This segment of the forecast provides pilots with crucial information about expected turbulent conditions in the atmosphere, which can significantly impact the safety and comfort of a flight. Understanding where turbulence may occur allows flight crews to make informed decisions regarding altitude and flight paths, contributing to operational safety.

In a TAF, turbulence information is specifically coded and detailed to enhance situational awareness for pilots. By noting turbulence forecasts, pilots are better equipped to prepare for varying flight conditions, which is vital for safety during takeoff, landing, and while in cruise flight.

The other options, such as providing visibility ranges, indicating cloud coverage, or reporting wind speed, serve different functions within a TAF and do not directly address the purpose of informing about turbulence conditions.