What does AGL stand for in aviation weather reporting?

AGL stands for Above Ground Level in aviation weather reporting. This term is crucial for pilots as it indicates the height of an aircraft relative to the ground directly beneath it. Understanding this measurement is essential for safe flying, particularly when considering terrain and obstacle clearance, as well as for evaluating weather phenomena that may be influenced by the proximity to the ground.

When reporting weather conditions, particularly with respect to cloud heights or visibility, AGL gives pilots a frame of reference that accurately conveys the altitude at which they might encounter significant weather events. For example, if cloud cover is reported at 1,500 AGL, that means it is at an altitude of 1,500 feet above the ground, which is important information for descent and approach planning.

Other terms provided, such as Altitude Gradient Level, Air Gradient Level, and Average Ground Level, do not have recognized meanings in aviation contexts and can lead to confusion regarding altitude reporting. Therefore, the widely accepted and correct term in this context is indeed Above Ground Level.