What is the first reportable item in the weather phenomena grouping?

The first reportable item in the weather phenomena grouping is intensity. This categorization is essential in meteorological reports, as it helps to communicate not just the presence of a weather phenomenon but also how severe it is. Intensity provides critical context for pilots, meteorologists, and other stakeholders by indicating how strong or weak the conditions are, which can greatly influence decision-making processes.

For example, intensity of precipitation can be described as light, moderate, or heavy, giving a clear understanding of what to expect. By establishing intensity as the primary descriptor, the subsequent reports can detail the type of precipitation and other factors such as duration and visibility, which can further inform assessments of overall safety and operational planning.

Understanding the role of intensity helps clarify the data provided in weather reporting, ensuring critical information is conveyed efficiently and effectively to those relying on it.