What does the "+" prefix denote when attached to weather abbreviations in aviation?

The "+" prefix attached to weather abbreviations in aviation is used to indicate severe intensity. In the context of aviation weather reporting, various intensifiers are applied to precipitation types to provide pilots and meteorologists with clear information regarding weather conditions. For instance, using a "+" before rain or snow signifies that the precipitation is occurring at a severe or intense level, which can significantly impact flight safety and operations. Understanding these indicators is critical for pilots in planning and making decisions based on current and anticipated weather conditions.