What weather condition is represented by the abbreviation RA?

The abbreviation RA stands for "Rain" in meteorological terminology. This designation is part of the METAR (Meteorological Aerodrome Report) system, which provides weather information relevant to aviation. In aviation weather reporting, abbreviations are standardized to maintain clarity and consistency. The use of RA indicates the occurrence of precipitation in the form of rain, which is crucial for pilots and drone operators to take into account during flight operations due to its potential effects on visibility, aircraft performance, and safety.

Understanding this terminology helps operators make informed decisions regarding flight planning and operations in adverse weather conditions. The other options, while they may sound plausible, do not represent official meteorological abbreviations recognized by aviation standards. This highlights the importance of familiarizing oneself with standard abbreviations used in aviation weather reporting.