What is the correct encoding for heavy rain and light drizzle in the reporting system?

In the context of the Limited Aviation Weather Reporting System (LAWRS), the encoding of precipitation types is designed to convey specific intensity and type of precipitation observed. Heavy rain is indicated by "+RA," while light drizzle is denoted by "DZ." When combining these two elements for reporting, the correct encoding must represent both the intensity of heavy rain and the light drizzle accurately.

The encoding "+RADZ" serves this purpose by designating heavy rain (as indicated by the +RA) alongside the drizzle (represented by DZ). This combination effectively communicates to users that not only is there heavy rain but also light drizzle occurring concurrently. Therefore, the option that captures both precipitation types correctly, reflecting their respective intensities, is "+RADZ."

Other options either represent only one aspect of this weather phenomenon or do not correctly combine heavy rain with light drizzle.