What type of precipitation does "RASN" include in its description?

The designation "RASN" is a meteorological abbreviation used to indicate a specific type of mixed precipitation that combines both rain and snow. Understanding this coding helps weather observers accurately report and interpret weather conditions.

Including both rain and snow means that the observed precipitation contains liquid water (rain) and frozen water (snow). This can occur when the temperature is hovering around the freezing point, allowing for both forms of precipitation to fall simultaneously or in close succession.

This combination can have significant implications for weather forecasting, road conditions, and public safety. Accurate reporting of this type of precipitation is essential for anticipating how conditions may evolve, especially during winter months when mixed precipitation can lead to hazardous conditions.