What is the encoding for heavy rain combined with light drizzle?

The encoding for heavy rain combined with light drizzle is represented as "+RADZ." The "+" symbol indicates heavy intensity, and "RA" denotes rain. The "DZ" signifies drizzle. This combination of codes is used in aviation weather reporting to convey that both heavy rain and light drizzle conditions are present simultaneously.

The use of "+RADZ" is specifically designed to provide pilots and meteorologists with a clear understanding of the intensity and type of precipitation being reported. The encoding is standard within meteorological practice to ensure that all relevant details of the weather conditions are communicated effectively.

The other options do not adequately represent the specific combination of heavy rain and light drizzle. "RAIN" simply indicates the presence of rain without specifying its intensity or any accompanying weather phenomena. "+DZ" indicates heavy drizzle alone without reference to rain, and "+RA" indicates only heavy rain without acknowledging the drizzle component.