What intensity indicator corresponds with heavy rain?

The intensity indicator for heavy rain is represented by a single plus sign (+). This designation signifies that the rainfall is sufficiently significant to be categorized as heavy, which typically means that the rate of precipitation is at a level that can lead to puddling and potentially localized flooding.

In meteorological observations, different intensity indicators are used to provide a standardized means of communicating the severity of rainfall events. Light rain is indicated by a minus sign (-), which denotes minimal precipitation that typically does not impact visibility or ground conditions substantially. Moderate rain, represented by no indicator ( ), suggests a more noticeable level of precipitation that may begin to affect outdoor conditions but is still manageable. Very heavy rain is indicated by three plus signs (+++), signifying extremely high rainfall rates that often lead to serious flooding and dangerous conditions.

Understanding these indicators helps observers accurately report weather conditions and informs the public and emergency services regarding potential weather-related impacts.