In a TAF, what does the abbreviation "HZ" indicate?

The abbreviation "HZ" in a Terminal Aerodrome Forecast (TAF) stands for haze. Haze refers to atmospheric conditions that reduce visibility due to the presence of particulates or moisture in the air. It's important in aviation to indicate reduced visibility conditions, as haze can greatly affect a pilot’s ability to see the runway and other critical visual cues during takeoff and landing.

Understanding the correct interpretation of "HZ" is crucial for pilots and meteorologists alike, as it assists in planning and executing safe flight operations. While other weather phenomena like heavy rain, high winds, and freezing fog are also significant in aviation forecasts, they are represented by different abbreviations. Recognizing these unique codes helps to ensure clear communication of weather conditions in a standardized way.