The intensity indicators for rain are:

The intensity indicators for rain categorize precipitation based on its strength and impact, which is crucial for weather observation and forecasting. The correct classification distinguishes between light, moderate, and heavy rain.

In this scheme, light rain is represented by a negative indicator (-), indicating that the intensity is less impactful or minimal. Moderate rain is represented by a blank or neutral indicator ( ), signifying that it falls between light and heavy in terms of intensity and therefore has a moderate effect. Heavy rain is denoted by a positive indicator (+), reflecting a significant and more impactful level of rainfall.

This classification allows meteorologists and aviation personnel to communicate effectively about weather conditions, enabling them to gauge potential effects on visibility, aircraft operations, and safety protocols. Using this standardized method helps ensure clarity and consistency in weather reporting.