Which weather condition does HZ refer to?

The term "HZ" is commonly used to refer to haze, which is a weather phenomenon characterized by the presence of particulate matter, such as dust or smoke, in the atmosphere. This reduces visibility and can impact flight operations. Haze occurs when humidity and temperature conditions allow these particles to remain suspended in the air, leading to a decrease in visual clarity. Understanding haze is crucial for UAS operators, as it can significantly affect the safety and effectiveness of drone operations. Recognizing the impact of haze on visibility underscores the importance of monitoring weather conditions before conducting flight missions, ensuring that pilots make informed decisions based on the environment.