How are the directions of winds aloft expressed?

Winds aloft are expressed in true degrees because meteorological data, including wind direction, is standardized for navigation and aviation purposes. This system uses a reference based on true north, which is consistent regardless of the location of the observer. In aviation and weather reporting, understanding wind direction is crucial for flight planning and safety, especially for determining takeoff and landing strategies.

True degrees provide a common frame of reference that pilots and meteorologists can rely on for accurate communication regarding wind conditions. This is essential for effective navigation and maintaining safety in flight, as wind direction can significantly influence aircraft performance and routing decisions.