What is represented by "DZ" in METAR terminology?

In METAR terminology, "DZ" stands for drizzle. This is a specific indication of precipitation that describes very light rain, often characterized by water droplets that are smaller than typical raindrops and fall more continuously. Drizzle is considered significant enough to be reported in aviation weather reports because it can affect visibility and surface conditions.

The presence of drizzle can also indicate a certain type of weather condition that might impact flight operations, which is why it is essential for pilots and air traffic controllers to be aware of it. Other terms in METAR have distinct meanings that do not overlap with drizzle; thus, 'DZ' is uniquely identified as drizzle in this context.